Cathodic Protection Report

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(1)ZAMZAMA CONDENSATE PIPELINE CP SYSTEM FOR. BHP BILLITON BY. NURICON PETROSERVICES (PTE.) LIMITED 4th Floor, Mubarak Manzil, 39 Garden Road, Karachi, Pakistan Phn : 92-21-273 5051 ( 4 Lines ) Fax : 92-21-273 4162 Email : [email protected].

(2) Report for: Client: Doc. Title Project:. BHP BILLITON NPSL Reference: PETROCHEM ENGG. & IND. CONSULTANTS Contract No: CP SYSTEM OF 6” DIA 28 Km PIPELINE Zamzama Condensate Pipeline CP System Design for BHP BILLITON. PETROCHEM:07/002 PEC/NU-2006/002 Doc. No.: Main Report. CATHODIC PROTECTION SURVEY RESULTS & SYSTEM DESIGN FOR:. BHP BILLITON. FACILITIES:. BHP GAS FIELDS, SIND, PAKISTAN. PROJECT:. ZAMZAMA CONDENSATE PIPELINE CP SYSTEM DESIGN REVIEW. CLIENT:. PETROCHEM ENGG. & INDUSTRIAL CONSULTANTS. CONTRACT DOC NO.. PEC/NU-2006/002. CONTRACT DATE:. APRIL 10, 2006. FIELD SURVEY BY:. MAQSOOD-UZ-ZAMAN, NPSL, KARACHI ASIF SIDDIQUI, NPSL, KARACHI TARIQ JAMEEL, NPSL, KARACHI PERVAIZ ABBASI, NPSL, KARACHI BURHAN, NPSL, KARACHI. REPORT BY:. MAQSOOD-UZ-ZAMAN, NURICON PETROSERVICES, KARACHI, PAKISTAN. FINAL REPORT DATE:. DECEMBER 2006. NPSL REFERENCE NO.. PETROCHEM :07/002. NURICON PETROSERVICES (PTE.) LTD. 4th Floor, Mubarak Manzil, 39 Garden Road, Karachi Phn : (92-21) 273 5051 ( 4 Lines ) Fax : (92-21) 273 4162. 1 E-mail : [email protected].

(3) Report for: Client: Doc. Title Project:. BHP BILLITON NPSL Reference: PETROCHEM ENGG. & IND. CONSULTANTS Contract No: CP SYSTEM OF 6” DIA 28 Km PIPELINE Zamzama Condensate Pipeline CP System Design for BHP BILLITON. PETROCHEM:07/002 PEC/NU-2006/002 Doc. No.: Main Report. TABLE OF CONTENTS. LIST OF ABBREVIATIONS............................................................................................. 3 INTRODUCTION & BACKGROUND ............................................................................. 5 SCOPE OF WORK............................................................................................................. 6 OBJECTIVE ....................................................................................................................... 6 SOIL RESISTIVITY SURVEY ......................................................................................... 6 DESIGN CONCEPTS ........................................................................................................ 7 BILL OF QUANTITIES ................................................................................................... 10 APPENDIX:. SOIL RESISTIVITY. APPENDIX:. SOIL CONDUCTIVITY / RESISTIVITY. APPENDIX:. DESIGN CALCULATIONS. APPENDIX:. DRAWINGS. 1. Schematic Arrangement of CP System Along Pipeline ROW ..........................................................................Drawing No. CP-LAY-01 2. Typical Shallow Vertical Groundbed Details ....................Drawing No. SVGB-LAY-01 3. Typical Anode Junction Box (AJB) Details .........................Drawing No. TYP-AJB-01 4. Typical Burial Detail for Pair of Earthing Electrodes & their Cable Connections to Insulating Flanges ............................................................................ Drawing No. EE-01 5. Typical Cable Connections to the Pipeline ........................Drawing No. TYP-CCON-01 6. Test Post Details ............................................................Drawing No. TP-01sheets 1 & 2 7. Typical Cable Trench Details ...........................................................Drawing No. CT-01 8. Current Measuring Test Station.................................................. Drawing No. CMTS-01. NURICON PETROSERVICES (PTE.) LTD. 4th Floor, Mubarak Manzil, 39 Garden Road, Karachi Phn : (92-21) 273 5051 ( 4 Lines ) Fax : (92-21) 273 4162. 2 E-mail : [email protected].

(4) Report for: Client: Doc. Title Project:. BHP BILLITON NPSL Reference: PETROCHEM ENGG. & IND. CONSULTANTS Contract No: CP SYSTEM OF 6” DIA 28 Km PIPELINE Zamzama Condensate Pipeline CP System Design for BHP BILLITON. PETROCHEM:07/002 PEC/NU-2006/002 Doc. No.: Main Report. LIST OF ABBREVIATIONS π. 3.14.... (a constant). ρb. Backfill resistivity (ohm-m). ρs. Soil resistivity (ohm-m). A AC or ac AP BHPB BHPBP. Ampere Alternating Current Anodic protection. BHP Billiton BHP Billiton Pakistan. CP CPP CPS. da. Cathodic Protection Casing potential profile Cathodic Protection System. Casing to Soil Potential (with respect to Saturated Cu-CuSO 4 Reference Electrode) Diameter of anode.. db DC or dc Dia ft, in, ICCP. Diameter of anode column/canister inclusive of backfil. Direct Current Diameter Foot, inch Impressed Current Cathodic Protection. ICCPS KM or km La Lb m. Impressed Current Cathodic Protection System Kilometer Length of anode. Length of anode column/canister including backfil Meter. mA MV or mv cm mm Na. Miliampere Milivolt Centimeter Millimeter No of anodes. NPSL PE Petrochem. Nuricon Petroservices (Pte.) Limited Polyethylene Petrochem Engineering (Pvt.) Limited Polarization Potential (with respect to Saturated Cu-CuSO 4 Reference Electrode). CSP. Potential. NURICON PETROSERVICES (PTE.) LTD. 4th Floor, Mubarak Manzil, 39 Garden Road, Karachi Phn : (92-21) 273 5051 ( 4 Lines ) Fax : (92-21) 273 4162. 3 E-mail : [email protected].

(5) Report for: Client: Doc. Title Project:. BHP BILLITON NPSL Reference: PETROCHEM ENGG. & IND. CONSULTANTS Contract No: CP SYSTEM OF 6” DIA 28 Km PIPELINE Zamzama Condensate Pipeline CP System Design for BHP BILLITON. PETROCHEM:07/002 PEC/NU-2006/002 Doc. No.: Main Report. PVC Rc Rg. Pipe to Soil Potential (with respect to Saturated Cu-CuSO 4 Reference Electrode) Polyvinyl Chloride Compound Cable resistance Resistance of single anode. Rgt ROW Rs Rt S. Resistance of multiple anodes to remote earth Right of way Resistance of structure to remote earth Total circuit resistance Spacing between the anode columns (wherever applicable). Sa Sav SCP SCPS sqm. Spacing between bottom and top of consecutive anodes Center to center spacing between vertical anode/backfill columns Sacrificial Cathodic Protection Sacrificial Anode Cathodic Protection System Square meter. SSP. Structure to Soil Potential (with respect to Saturated Cu-CuSO4 Reference Electrode). TEG. Thermo-electric generator. PSP. NURICON PETROSERVICES (PTE.) LTD. 4th Floor, Mubarak Manzil, 39 Garden Road, Karachi Phn : (92-21) 273 5051 ( 4 Lines ) Fax : (92-21) 273 4162. 4 E-mail : [email protected].

(6) Report for: Client: Doc. Title Project:. BHP BILLITON NPSL Reference: PETROCHEM ENGG. & IND. CONSULTANTS Contract No: CP SYSTEM OF 6” DIA 28 Km PIPELINE Zamzama Condensate Pipeline CP System Design for BHP BILLITON. PETROCHEM:07/002 PEC/NU-2006/002 Doc. No.: Main Report. DESIGN REPORT FOR 6” X 28 KM CONDENSATE PIPELINE FROM BHP’S ZAMZAMA GAS FIELD TO PARCO’S BUBAK STATION This document outlines the Cathodic Protection System Design and Engineering for the Ø6”x 28 km 3LPE coated Condensate Pipeline from BHP Billiton’s Zamzama Gas Field to Parco Booster Pumping Station at Bhubak. Petrochem Engineering is the consultant for design and engineering of the pipeline for BHP and they acquired the services of Nuricon Petroservices (Pte.) Limited (NPSL) to Design and Engineer the CP system for this pipeline and to carry out pre design surveys for this purpose. Zamzama is located near Dadu, Sind and is about 330 km northwest of Karachi, Pakistan. The pipeline would carry gas condensate from condensate tanks at Zamzama to condensate storage tanks at Bhubak for onward sale and distribution. INTRODUCTION & BACKGROUND Before carrying out the actual Soil Resistivity Survey by NPSL, the BHPB provided some soil resistivity data of the surrounding areas and sought NPSL advice whether a sacrificial anode system based on zinc ribbon can be designed for the pipeline or not. In response NPSL recommended an Impressed Current CP system as it was most suitable for that environment though they did not rule out the possibility of a Sacrificial CP system based on the zinc anode ribbon. BHPB in response advised to design a zinc ribbon based system and on NPSL’s recommendation they agreed on the discrete anode system as in NPSL’s opinion ribbon system did not prove successful in that area for other BHPB lines. After agreement for the type of CP system based on the BHPB provided data, NPSL team mobilized to the site and collected soil resistivity measurement data. The data showed that the soil resistivity in the upper layer is generally high averaging 52.87 ohm- m with few locations suitable for making the groundbeds. Preliminary design and the groundbed calculations including proposed groundbed locations were reported to BHPB that were in principal, agreed by them with few changes. Subsequently NPSL team was again mobilized to site to mark the precise groundbed locations on the drawings and also to confirm the resistivities. It was found that the resistivities of the upper layer have been changed that necessitated to take the resistivities of the deeper soil layers which were taken by using Geonics Model EM34 Soil Conductivity Meter. It is noted that the upper soil stratum is susceptible to the seasonal changes due to varying degrees of rain fall and cultivation cycles. Fertilizer, irrigation, seasonal water ponds are responsible for changes in the resistivities.. NURICON PETROSERVICES (PTE.) LTD. 4th Floor, Mubarak Manzil, 39 Garden Road, Karachi Phn : (92-21) 273 5051 ( 4 Lines ) Fax : (92-21) 273 4162. 5 E-mail : [email protected].

(7) Report for: Client: Doc. Title Project:. BHP BILLITON NPSL Reference: PETROCHEM ENGG. & IND. CONSULTANTS Contract No: CP SYSTEM OF 6” DIA 28 Km PIPELINE Zamzama Condensate Pipeline CP System Design for BHP BILLITON. PETROCHEM:07/002 PEC/NU-2006/002 Doc. No.: Main Report. As a result of the resistivity changes the finally proposed groundbeds are kept deeper. Since higher resistivity reduces the groundbed current output therefore higher number of anodes is required but higher number of anodes would increase the installation cost therefore two anodes per anode column are proposed to limit the installation cost by reducing the boreholes to half. Total four groundbeds are proposed, two at the ends and two in between. Test Posts are designed to reduce the risk of vandalism which is a common problem in that area. NPSL proposed the average distance between test stations as 1.0 km to facilitate coating and Close Interval Potential Surveys (CIPS) in future however BHPB opted for a distance of 2.5 km between the subsequent test stations. To our understanding BHPB would install some Radio Transmitter test stations on experimental basis along the pipeline. Grounding or Earthing zinc electrodes are also proposed along with the surge diverters, to be installed across the insulating flanges. SCOPE OF WORK The detailed design report shall comprise the minimum requirement for the design, material, installation and commissioning for the external cathodic protection system to be installed for 6“x28 km Condensate pipeline from ZamZama to Parco’s Bubak Station. The Cathodic Protection System shall be designed as a stand alone system capable for operating independently of any other existing cathodic protection systems and shall be a sacrificial anode system. OBJECTIVE The cathodic protection system objective is to prevent pipeline from corrosion by making it sufficiently cathodic by supplying current to the pipeline from anodes so that the polarization potential along the whole pipeline is between -850 to -1200 mv with respect to the Cu-CuSO4 half cell. SOIL RESISTIVITY SURVEY Soil Resistivity survey was done by Wenner 4 Pin Method at 1.25 m and 2.5 m pin spacing at every 500 m along the entire pipeline right of way (ROW). The average resistivity is estimated to be 52.87 ohm- m and the data is appended at Appendix-Soil Resistivity. There were very few low resistivity locations where groundbed could be suitably placed. After acquiring this resistivity data and the approval of preliminary calculations, 4 Pin method was repeated at the precise groundbed locations however it was revealed that the resistivities have been changed and resistivities of deeper soil layers would need to be surveyed that may be less susceptible to the environmental changes. For this purpose Geonics Model EM34 was used to measure the soil conductivities that were converted to resistivities. NURICON PETROSERVICES (PTE.) LTD. 4th Floor, Mubarak Manzil, 39 Garden Road, Karachi Phn : (92-21) 273 5051 ( 4 Lines ) Fax : (92-21) 273 4162. 6 E-mail : [email protected].

(8) Report for: Client: Doc. Title Project:. BHP BILLITON NPSL Reference: PETROCHEM ENGG. & IND. CONSULTANTS Contract No: CP SYSTEM OF 6” DIA 28 Km PIPELINE Zamzama Condensate Pipeline CP System Design for BHP BILLITON. PETROCHEM:07/002 PEC/NU-2006/002 Doc. No.: Main Report. This method induces electromagnetic current into the soil and measures the induced current, knowing that the induction is proportional to the conductivities. This data is given at Appendix-Soil Conductivity/Resistivity. The analyses of all the acquired data lead to the conclusion that deeper groundbeds would be required to get the sufficient amount of protection current. It also necessitated the use of additional anodes than the required by anode weight calculations. DESIGN CONCEPTS The system design considerations are: Pipeline Information Diameter: Length: Wall Thickness: Coating Type: Coating Conductance: Isolation:. The pipeline has a nominal diameter of 6 inches and outer diameter of 6.625” (0.168 meter). The length of pipeline is about 28 km. The minimum wall thickness of the pipeline is 6 mm. 3 Layer Polyethylene Has an average coating conductance of 1.89x10-4 S/m2 at the end of its design life of 25 years. Electrically isolated from metallic structures along the ROW as well as at both the ends.. CP System Information Type: Anodes Material: Anode Size: Anode Weight: Package:. Sacrificial Groundbeds Zinc 2”x2”x60” long (50x50x1500 mm) 60 lbs (27.27 kg) The anodes are to be packaged in 50% hydrated gypsum (CaSO4) and 50% bentonite clay mixture. Package dimensions are given in the relevant drawing. No. of Groundbeds: Four: A, B, C and D Anode Columns: Each groundbed has 6 anode columns and 2 anodes per column. This is to reduce the installation complexities and costs since the holes are deeper than the normal for sacrificial anodes. Location of Groundbeds: See following table.. NURICON PETROSERVICES (PTE.) LTD. 4th Floor, Mubarak Manzil, 39 Garden Road, Karachi Phn : (92-21) 273 5051 ( 4 Lines ) Fax : (92-21) 273 4162. 7 E-mail : [email protected].

(9) Report for: Client: Doc. Title Project:. BHP BILLITON NPSL Reference: PETROCHEM ENGG. & IND. CONSULTANTS Contract No: CP SYSTEM OF 6” DIA 28 Km PIPELINE Zamzama Condensate Pipeline CP System Design for BHP BILLITON. PETROCHEM:07/002 PEC/NU-2006/002 Doc. No.: Main Report. Serial. Groundbed Identification. 1.. A. 0+556. Zamzama Plant, near grave yard. Anodes and junction box to be installed within the plant fencing. Depth of inactive column: 26 meters.. 2.. B. 8+375. This location is near Goath (village) Gullan Punhwar. Depth of inactive column: 26 meters.. 3.. C. 19+318. This location is near the back of grid station. Depth of inactive column: 15 meters.. 4.. D. 27+720. Preferably within the Parco boundary wall where the pipeline enters the pumping station boundary. BHPB to decide with PARCO. Depth of inactive column: 10 meters.. Test Stations:. Serial. Chainage. Location/Remarks. See the following table. Test Stations with only two wires for only potential monitoring purpose are identified as TS whereas test stations having four or more wires, intended for potential monitoring as well as Line Current measuring, are identified as TS/CMP. Test stations are designed to reduce the risk of vandalism.. Type. Chainage. Identification. 1.. Potential Monitoring 0+000 & Current Measuring. 2.. Potential Monitoring. 2+500. TS. 3.. Potential Monitoring. 5+000. TS/CMP. 4.. Potential Monitoring. 7+500. TS. 5.. Potential Monitoring. 10+000. TS. 6.. Potential Monitoring. 12+500. TS/CMP. 7.. Potential Monitoring. 15+000. TS. TS/CMP Across insulating flange; can also measure current. NURICON PETROSERVICES (PTE.) LTD. 4th Floor, Mubarak Manzil, 39 Garden Road, Karachi Phn : (92-21) 273 5051 ( 4 Lines ) Fax : (92-21) 273 4162. Remarks. 8 E-mail : [email protected].

(10) Report for: Client: Doc. Title Project:. BHP BILLITON NPSL Reference: PETROCHEM ENGG. & IND. CONSULTANTS Contract No: CP SYSTEM OF 6” DIA 28 Km PIPELINE Zamzama Condensate Pipeline CP System Design for BHP BILLITON. Chainage. Identification. Serial. Type. 8.. Potential Monitoring. 17+500. TS. 9.. Potential Monitoring. 20+000. TS. 10.. Potential Monitoring. 20+950. TS. 11.. Potential Monitoring. 21+100. TS. 12.. Potential Monitoring. 23+500. TS/CMP. 13.. Potential Monitoring. 26+000. TS. 14.. Potential Monitoring. 27+700. TS. 15.. Potential Monitoring N/A & Current Measuring. PETROCHEM:07/002 PEC/NU-2006/002 Doc. No.: Main Report. Remarks. TS/CMP Across insulating flange; can also measure current. Cased Crossings:. There are no cased crossings along the pipeline ROW.. Earthing Electrodes:. Earthing electrodes are used at insulating flanges to shunt the electric surges as well as to bypass the lightening surge. This may also provide a little protection on the non-protected side of the insulating flange. Four electrodes, 1.4x1.4x60” each, are to be packaged in 50-50 bentonite/gypsum mixture. Electrodes are to be paired diagonally and joined diagonally.. Surge Diverters:. To diffuse the electric and lightening surges across the insulating flanges the surge diverters are proposed to supplement the action of earthing electrodes.. Cables:. All the proposed cables would have PVC insulation & sheath having stranded high purity annealed copper conductor and a voltage grade of 600/1000. Anode cable s would have 16 mm2 conductors, whereas negative cable would have a 50 mm2 conductor. All cables for test stations and earthing electrodes would have conductor size of 6 mm2 . Each anode of a particular groundbed is proposed to have equal anode-cable lengths to keep the cable resistance and hence the anode output, uniform.. NURICON PETROSERVICES (PTE.) LTD. 4th Floor, Mubarak Manzil, 39 Garden Road, Karachi Phn : (92-21) 273 5051 ( 4 Lines ) Fax : (92-21) 273 4162. 9 E-mail : [email protected].

(11) Report for: Client: Doc. Title Project:. BHP BILLITON NPSL Reference: PETROCHEM ENGG. & IND. CONSULTANTS Contract No: CP SYSTEM OF 6” DIA 28 Km PIPELINE Zamzama Condensate Pipeline CP System Design for BHP BILLITON. PETROCHEM:07/002 PEC/NU-2006/002 Doc. No.: Main Report. BILL OF QUANTITIES Serial. Description. Unit. Quantity. 1a.. Zinc anodes of 50x50x1500 mm having net metal weight of 27.27 kg (60 lb) with carbon steel insert and zinc conforming to American Military standard for pure zinc. Anode cable, 25 sqmm x 41 meter long, single core stranded copper with PVC insulation and PVC sheath of 600/1000 volt grade should be mechanically tightened to the steel insert and should also be brazed to it. This joint should be potted with the epoxy and top of the anode around this joint to be coated with epoxy to avoid preferential corrosion. Also, the joint should be strong enough to hold the weight of the anode and packaged backfill.. Each. 24. 1b.. Zinc anodes of 50x50x1500 mm having net metal weight of 27.27 kg (60 lb) with carbon steel insert and zinc conforming to American Military standard for pure zinc. Anode cable, 16 sqmm x 31 meter, single core stranded copper with PVC insulation and PVC sheath of 600/1000 volt grade should be mechanically tightened to the steel insert and should also be brazed to it. This joint should be potted with the epoxy and top of the anode around this joint to be coated with epoxy to avoid preferential corrosion. Also, the joint should be strong enough to hold the weight of the anode and packaged backfill.. Each. 12. 1c.. Zinc anodes of 50x50x1500 mm having net metal weight of 27.27 kg (60 lb) with carbon steel insert and zinc conforming to American Military standard for pure zinc. Anode cable, 16 sqmm x 26 meter, single core stranded copper with PVC insulatio n and PVC sheath of 600/1000 volt grade should be mechanically tightened to the steel insert and should also be brazed to it. This joint should be potted with the epoxy and top of the anode around this joint to be coated with epoxy to avoid preferential corrosion. Also, the joint should be strong enough to hold the weight of the anode and packaged backfill.. Each. 12. 2.. 4-Electrode Zinc Earthing Cell (each electrode of size 1.4”x1.4”x60”) packaged in 50-50 bentonite/gypsum mixture. Electrodes to be diagonally paired and connected and each pair to have 5 meter cable to connect to the insulating flanges.. Package. 2. NURICON PETROSERVICES (PTE.) LTD. 4th Floor, Mubarak Manzil, 39 Garden Road, Karachi Phn : (92-21) 273 5051 ( 4 Lines ) Fax : (92-21) 273 4162. 10 E-mail : [email protected].

(12) Report for: Client: Doc. Title Project:. BHP BILLITON NPSL Reference: PETROCHEM ENGG. & IND. CONSULTANTS Contract No: CP SYSTEM OF 6” DIA 28 Km PIPELINE Zamzama Condensate Pipeline CP System Design for BHP BILLITON. Serial. Description. PETROCHEM:07/002 PEC/NU-2006/002 Doc. No.: Main Report. Unit. Quantity. 3.. Cadweld Charges, 15 gram. Each. 40. 4.. Cadweld Mould. Each. 1. 5.. Test Stations (see drawing No. TYP-TP-01).. Each. 10. 6.. Test Station/Current Measuring Post having 6 each M6 Terminals. Terminals to be of stainless steel, copper or brass, complete with terminal box, fixtures and accessories.. Each. 5. 7.. Anode bond box, to be able to accommodate 13 shunts, 12 anode cables, one No. Negative Cable and one Test Cable. Junction box to be complete with all fixtures and accessories including bus bar.. Each. 4. 8.. Royston Handy Caps with primer or Raychem's Perp Repair system for coating repair, and covering of cadweld.. Each. 40. 9.. Stubs, 50x50x6 mm each (to be cut from ? 6” pipe piece), to be welded on the pipeline for cadwelding/cable connections to the pipe. Welding to be done by the pipeline contractor.. Each. 40. 10.. Negative cable, 50 mm2 Cu/PVC/PVC, single core stranded, 600/1000 volt grade.. Meter. 40. 11.. Test cable, 6 mm2 Cu/PVC/PVC, single core stranded, 600/1000 volt grade. Black Color.. Meter. 550. 12.. Test cable, 6 mm2 Cu/PVC/PVC, single core stranded, 600/1000 volt grade. Red Color.. Meter. 500. 13.. Test cable, 6 mm2 Cu/PVC/PVC, single core stranded, 600/1000 volt grade. Blue Color.. Meter. 40. 14.. Miscellaneous items e.g., cable lugs, nut-bolts, negative & test cables, coating repair material, sand, cement, crush for junction boxes’ grouting, etc.. Lot. 1. 15.. SERVICES - Installation, Test and Commissioning. Lump Sum. 1. 16.. Surge Diverters ( see attached data sheet ). Each. 2. NURICON PETROSERVICES (PTE.) LTD. 4th Floor, Mubarak Manzil, 39 Garden Road, Karachi Phn : (92-21) 273 5051 ( 4 Lines ) Fax : (92-21) 273 4162. 11 E-mail : [email protected].

(13) POWER SUPPLY SYSTEMS Isolating spark gaps. Dimension drawing EXFS. EXFS L / EXFS KU EXFS L200. Installation of EXFS. For indirect connection/earthing of functionally separate parts of installations when being affected by lightning. EXFS L ...: Ex Isolating spark gap for aboveground installation. Unit for lightning equipotential bonding according to IEC 62305 for hazardous areas (Zone 2) Corresponds to "ATEX Directive" 94/9/EC Corrosion-resistant enclosure of zinc die casting with plastic cover and flexible conductor connection For bridging insulating pieces, insulating flanges, etc. in cathodic protected pipe sections. EXFS L200 Lightning impulse current (10/350 µs) current (10/350) Classfication of lightning current carrying capability acc. to prEN 50164-3 Nominal discharge current (8/20 µs) current (8/20). 50 kA N 100 kA. 100% lightning impulse sparkover voltage Lightning impulse sparkover voltage. <= 2.5 kV. Power frequency sparkover voltage (50 Hz) sparkover voltage (50 Hz). <= 1.2 kV. Type of protection according to EN 50014, EN 50021 acc. to EN 50014, 50021 Operating temperature range Degree of protection Approvals, Certifications Length of enclosure length Diameter of enclosure Ø Enclosure material material Connecting cable cable Cable length Suitable for flange size size. [TU]. II 3 G EEx nC II T4 -20°C...+80°C IP 54 ZELM 03 ATEX 3192X 90 mm 63 mm zinc die casting, plastic H01N2-D 25 mm2 with cable lug and M10 screw/nut 200 mm 120-230 mm. Ordering information Type Part No. Packing unit. EXFS L200 923 061 1 pcs.. Change in form and technology, with masses, weights and materials we reserve ourselves in the sense of the progress of the technology. The illustrations are noncommittal.. Seite 1© Copyright 2005 DEHN + SÖHNE GmbH + Co. KG Hans-Dehn-Str. 1 Postfach 1640 D-92306 Neumarkt Tel. 09181 906-0 www.dehn.de [email protected].

(14) APPENDIX: SOIL RESISTIVITY.

(15) BHP BILLITON PAKISTAN. Appendix-Soil Resistivity. CP of Dia. 6"x28 km Zamzama-Bhubak Condensate Pipeline. SOIL RESISTIVITY OBSERVATIONS DATA SHEET Cathodic Protection System for 6''dia 28km Condensate Pipeline Resistivites taken from BHP Zamzama plant to Parco Bubak station S. No Pin Spacing Ohms Pin Spacing Ohms Remarks 1 1.25 4.8 37.70 2.5 3.3 51.84 Farms (June 5, 2006) 2 1.25 1.4 11.00 2.5 0.4 6.28 - do 3 1.25 6.16 48.38 2.5 4.71 73.98 - do 4 1.25 3.67 28.82 2.5 0.67 10.52 - do 5 1.25 2.4 18.85 2.5 2 31.42 - do 6 1.25 1.8 14.14 2.5 1.5 23.56 - do 7 1.25 7.1 55.76 2.5 5.3 83.25 - do 8 1.25 0.4 3.14 2.5 0.2 3.14 straws & bushes 9 1.25 3.8 29.85 2.5 0.4 6.28 smooth surface 10 1.25 2.2 17.28 2.5 0.9 14.14 Farms 11 1.25 9.4 73.83 2.5 8.9 139.80 - do 12 1.25 5.1 40.06 2.5 4.9 76.97 - do 13 1.25 13.1 102.89 2.5 12.7 199.49 - do 14 1.25 3.3 25.92 2.5 1.4 21.99 Wadara Swalah Goth 15 1.25 0.3 2.36 2.5 0.2 3.14 Farm - Proposed Groundbed Location 16 1.25 155 1217.37 2.5 140 2199.11 dry land greaveyard June 6,2006 17 1.25 5.1 40.06 2.5 1.6 25.13 Farms 18 1.25 15 117.81 2.5 12 188.50 - do 19 1.25 7 54.98 2.5 5 78.54 - do 20 1.25 10 78.54 2.5 7 109.96 - do 21 1.25 8 62.83 2.5 6 94.25 - do 22 1.25 0.3 2.36 2.5 0.2 3.14 - do 23 1.25 4.4 34.56 2.5 1.6 25.13 - do 24 1.25 4.1 32.20 2.5 3.1 48.69 - do 25 1.25 7 54.98 2.5 2 31.42 - do 26 1.25 0.76 5.97 2.5 0.67 10.52 - do 27 1.25 0.68 5.34 2.5 0.42 6.60 - do 28 1.25 2.7 21.21 2.5 2.4 37.70 wet soil 29 1.25 3.6 28.27 2.5 1.6 25.13 farms 30 1.25 2.6 20.42 2.5 1.2 18.85 turning point road crossing 31 1.25 1.6 12.57 2.5 1.1 17.28 farms 32 1.25 1.2 9.42 2.5 0.58 9.11 saikh colony/ road crossing 33 1.25 0.84 6.60 2.5 0.77 12.10 Farms 34 1.25 6.8 53.41 2.5 3.5 54.98 - do 35 1.25 2.4 18.85 2.5 1.8 28.27 - do 36 1.25 3 23.56 2.5 1 15.71 - do 37 1.25 4 31.42 2.5 2 31.42 water chanel SNG pipeline crossing 38 1.25 2 15.71 2.5 0.9 14.14 Farms 39 1.25 5 39.27 2.5 3 47.12 - do 40 1.25 4 31.42 2.5 1 15.71 - do 41 1.25 4 31.42 2.5 2 31.42 - do 42 1.25 0.6 4.71 2.5 0.4 6.28 - do -. Nuricon Petroservices (Pte.) Limited 4th Floor Mubarak Manzil 39 Garden Road, Karachi Tel. (+92-21) 273 5051-4 Lines, Fax: 273 4162. Page 1 of 2.

(16) BHP BILLITON PAKISTAN. Appendix-Soil Resistivity. S. No Pin Spacing Ohms Pin Spacing Ohms 43 1.25 0.9 7.07 2.5 0.3 44 1.25 8 62.83 2.5 5.2 45 1.25 3.8 29.85 2.5 0.2 46 1.25 5.1 40.06 2.5 1.8 47 1.25 5.1 40.06 2.5 3.1 48 1.25 6.1 47.91 2.5 3 49 1.25 1.4 11.00 2.5 0.7 50 1.25 4 31.42 2.5 2 51 1.25 5 39.27 2.5 0.3 52 1.25 0.77 6.05 2.5 0.72 53 1.25 0.65 5.11 2.5 0.29 54 1.25 0.6 4.71 2.5 0.4 55 1.25 3.1 24.35 2.5 2.4 56 1.25 2.8 21.99 2.5 1.7 57 1.25 2.5 19.63 2.5 1.8 58 1.25 4 31.42 2.5 3 59 1.25 7 54.98 2.5 3 60 1.25 6 47.12 2.5 4 61 3 3.1 58.43 4 2.6 62 1.25 10 78.54 2.5 7.9 63 3 5.5 103.67 4 4.6 Average 52.8673 Average 6-Nov-06 S. No Pin Spacing Ohms Data acquired on 6 Nov 2006 1 2.0 3 37.70 2 2.0 1.4 17.59 3 4 5 6 7. 2.0 2.0 2.0 2.0 2.0. 0.8 3.2 0.7 0.4 1.2. 10.05 40.21 8.80 5.03 15.08. 4.71 81.68 3.14 28.27 48.69 47.12 11.00 31.42 4.71 11.31 4.56 6.28 37.70 26.70 28.27 47.12 47.12 62.83 65.35 124.09 115.61 75.71. CP of Dia. 6"x28 km Zamzama-Bhubak Condensate Pipeline. Remarks Farm - Proposed Groundbed Location Farms - do - do - do - do - do - do - do - do cotton factory Farms - do - do Parco bubak outside boundary wall inside Parco Bubak inside Parco Bubak outside Zamzama plant near fencing June 7,2006 outside Zamzama plant near fencing. Pin Spacing Ohms. Remarks. 4.0 4.0. 3.5 1. 87.96 25.13. 4.0 4.0 4.0 4.0 4.0. 0.5 1.6 1 0.5 0.9. 12.57 40.21 25.13 12.57 22.62. At chainage 7+000 8.375 km near Graveyard (Gullan Punhwar Goth) " " Near grid station's back " ". 10-Nov-06 Serial 1. 2. 3. 4. 5. 6.. Pin Spacing (m) 2 4 6 Resistivities (ohm-m) 24.20 30.40 36.50 31.90 82.20 140.60 2.61 3.69 29.30 27.30 29.70 20.40 22.00 27.00 25.90 29.30 29.20. Remarks Zamzama plant grave yard Chainage 7+000 Corner of Jiven Khan Jamali goath road 100 meter inside from corner Near grid station Outside Parco bhubak terminal. Nuricon Petroservices (Pte.) Limited 4th Floor Mubarak Manzil 39 Garden Road, Karachi Tel. (+92-21) 273 5051-4 Lines, Fax: 273 4162. Page 2 of 2.

(17) APPENDIX:. SOIL CONDUCTIVITY / RESISTIVITY.

(18) BHP BILLITON, PAKISTAN. CP of Dia. 6"x28 km Zamzama-Bhubak Condensate Pipeline. Appendix - Soil Conductivity/Resistivity. APPARENT SOIL CONDUCTIVITY / RESISTIVITY ACQUIRED BY GEONICS MODEL EM34 Apparent Soil Conductivity (mS/m) Coil Spacing 10 m 20 m 40 m Location Dipole=> HD VD HD VD HD VD Depth=> 7.5 m 15 m 15 m 30 m 30 m 60 m Behind Grid Station E/W 60.00 55.00 89.00 100.00 90.00 167.00 N/S 70.00 70.00 82.00 107.00 68.00 162.00 Averages 65.00 62.50 85.50 103.50 79.00 164.50 7+00 km from Zamzama E/W 26.00 16.00 24.00 40.00 48.00 74.00 N/S 17.00 32.00 26.00 42.00 52.00 71.00 * Averages BHP Plant, outside fencing near graveyard 38.00 41.00 47.00 52.00 72.00 104.00 Averages Outside Bhubak west wall N/S 88.00 118.00 111.00 264.00 E/W 70.00 59.00 75.00 75.00 Averages. Apparent Soil Resistivity (ohm-m) Coil Spacing 10 m 20 m 40 m HD VD HD VD HD VD 7.5 m 15 m 15 m 30 m 30 m 60 m. Layer Resistivities (ohm-m) 0 - 10 m 10 - 20 m 20 - 40 m. 16.67 18.18 11.24 10.00 11.11 14.29 14.29 12.20 9.35 14.71 15.85 10.69. 5.99 6.17 9.49. 15.85. 8.07. 8.54. 38.46 62.50 41.67 25.00 20.83 58.82 31.25 38.46 23.81 19.23 47.76 32.23. 13.51 14.08 16.92. 47.76. 24.33. 11.47. 26.32 24.39 21.28 19.23 13.89 25.35 20.25. 9.62 11.75. 25.35. 16.86. 8.28. 12.77. 8.04. 11.36 8.47 9.01 3.79 14.29 16.95 13.33 13.33 12.77 9.87. -. -. * At all groundbed locations resistivity is lower than 8.54 ohm-m below the depth of 26 m. Nuricon Petroservices (Pte.) Ltd.. Page 1 of 1.

(19) APPENDIX: DESIGN CALCULATIONS.

(20) BHP BILLITON, PAKISTAN. Appendix - Design Calculations Rev1. CP Design Calculations for Dia. 6" x 28 km Codensate Pipeline Formulae: α = sqrt(r * g). Equation-1. Rg = sqrt (r/g). Equation-2. Ed = Ex Cosh (α * x). Equation-3. Ex = Ed / Cosh (α * x). Equation-4. Ix = Id * Exp(-a*x). Equation-5. Rso = Rg * Coth (α*x). Equation-6. 1/2. Equation-7. Rg = (r/g) Where:. α = Attenuation Constant Rg = Characteristic Resistance of the pipeline, ohm r = Unit lineal resistance, ohms/unit length g = Unit lineal conductance to earth, S/unit length x = No. of unit lengths (distance, in meters here) Ed = Potential rise at drain point, v Id = Current at drain point or Initial point, A Rso = Open circuit resistance of the finite or isolated pipeline, ohm Resistivity of steel = r = ρ * L/A. 13.4 µohm-cm 0.134 µohm-m Equation-8. Where: ρ = resistivity, ohm-meter L = Length of pipe or rod, meter 2 A = Crossectional Area of Casing, m r = Resistance of Casing of Length L 1/r = Conductance along 1 meter of casing/pipe, S. Nuricon Petroservices (Pte.) Ltd.. CP of Dia. 6"x28 km Zamzama-Bhubak Condensate Pipeline.

(21) BHP BILLITON, PAKISTAN. CP of Dia. 6"x28 km Zamzama-Bhubak Condensate Pipeline. Appendix - Design Calculations Rev1. Calculations System Pipe OD (m) Wall Thickness (m) Average Soil Resistivity along ROW (ohm-m) 2 Crossectional area (m ) Pipeline Resistance (ohm/m) Specific coating conductance (S/sqm) Lineal coating conductance (S/m) Lineal resistance of Pipeline (ohm/m) Lineal conductance (S/m) α Rg (sqrt(r/g)) x Rso (ohm). Zn 0.168 0.006 52.870 0.00325 4.12E-05 1.89E-04 9.98E-05 4.12E-05 9.98E-05 6.42E-05 0.643 8375 m 1.309. Zn 0.168 0.006 52.870 0.00325 4.12E-05 1.89E-04 9.98E-05 4.12E-05 9.98E-05 6.42E-05 0.643 19318 m 0.760. Zn 0.168 0.006 52.870 0.00325 4.12E-05 1.89E-04 9.98E-05 4.12E-05 9.98E-05 6.42E-05 0.643 28000 m 0.679. Zn 0.168 0.006 52.870 0.00325 4.12E-05 1.89E-04 9.98E-05 4.12E-05 9.98E-05 6.42E-05 0.643 28000 m 0.679. Zn 0.168 0.006 52.870 0.00325 4.12E-05 1.89E-04 9.98E-05 4.12E-05 9.98E-05 6.42E-05 0.643 8375 m 1.309. Zn 0.168 0.006 52.870 0.00325 4.12E-05 1.89E-04 9.98E-05 4.12E-05 9.98E-05 6.42E-05 0.643 10943 m 1.061. Zn 0.168 0.006 52.870 0.00325 4.12E-05 1.89E-04 9.98E-05 4.12E-05 9.98E-05 6.42E-05 0.643 19625 m 0.755. Zn 0.168 0.006 52.870 0.00325 4.12E-05 1.89E-04 9.98E-05 4.12E-05 9.98E-05 6.42E-05 0.643 28000 m 0.679. Zn 0.168 0.006 52.870 0.00325 4.12E-05 1.89E-04 9.98E-05 4.12E-05 9.98E-05 6.42E-05 0.643 19318 m 0.760. Zn 0.168 0.006 52.870 0.00325 4.12E-05 1.89E-04 9.98E-05 4.12E-05 9.98E-05 6.42E-05 0.643 10943 m 1.061. Zn 0.168 0.006 52.870 0.00325 4.12E-05 1.89E-04 9.98E-05 4.12E-05 9.98E-05 6.42E-05 0.643 8682 m 1.271. Zn 0.168 0.006 52.870 0.00325 4.12E-05 1.89E-04 9.98E-05 4.12E-05 9.98E-05 6.42E-05 0.643 28000 m 0.679. Zn 0.168 0.006 52.870 0.00325 4.12E-05 1.89E-04 9.98E-05 4.12E-05 9.98E-05 6.42E-05 0.643 19625 m 0.755. Zn 0.168 0.006 52.870 0.00325 4.12E-05 1.89E-04 9.98E-05 4.12E-05 9.98E-05 6.42E-05 0.643 8682 m 1.271. 8.54 3 0.01 6 6 0 0.616. 8.54 3 0.01 6 6 0 0.616. 8.54 3 0.01 6 6 0 0.616. 8.54 3 0.01 6 6 0 0.616. 8.54 3 0.01 6 6 0 0.616. 8.54 3 0.01 6 6 0 0.616. 8.54 3 0.01 6 6 0 0.616. 8.54 3 0.01 6 6 0 0.616. 8.54 3 0.01 6 6 0 0.616. 8.54 3 0.01 6 6 0 0.616. 8.54 3 0.01 6 6 0 0.616. 8.54 3 0.01 6 6 0 0.616. 8.54 3 0.01 6 6 0 0.616. 8.54 3 0.01 6 6 0 0.616. 0.28 v 1.10 v 0.60 v 0.00 v B-D 0.36 A 0.62 A. 0.26 v 1.10 v 0.60 v 0.00 v C 0.39 A. 0.28 v 1.10 v 0.60 v 0.00 v C-A 0.36 A. 0.32 v 1.10 v 0.60 v 0.00 v C-B 0.30 A. 0.34 v 1.10 v 0.60 v 0.00 v C-D 0.27 A 0.63 A. 0.26 v 1.10 v 0.60 v 0.00 v D-A 0.39 A. 0.28 v 1.10 v 0.60 v 0.00 v D-B 0.36 A. 0.145 v 0.10 A. 0.085 v 0.06 A 0.952 v. 0.148 v 0.11 A. 0.252 v 0.15 A. 0.291 v 0.15 A. 0.085 v 0.06 A 0.698 v. 0.145 v 0.10 A. 0.34 v 1.10 v 0.60 v 0.00 v D-C 0.27 A 0.39 A 2.03 A 0.291 v 0.15 A. 0.052 27.27 0.0840 0.8 35.2. 0.052 27.27 0.0840 0.8 35.0. Groundbed Resistance Soil resistivity (ohm-m) Anode/bfill length (m) Anode diameter after 80% consumed ( m) Annode spacing (m) No. of anodes Internal resistance (ohm) Groundbed resistance (ohm). Potential Attenuation & Groundbed Output Voltage swing at drain point based on Rso & Id, Ed 0.34 v 0.28 v 0.26 v 0.26 v 0.34 v 0.32 v Anode Potential (v) 1.10 v 1.10 v 1.10 v 1.10 v 1.10 v 1.10 v Pipeline Potential (v) 0.60 v 0.60 v 0.60 v 0.60 v 0.60 v 0.60 v Anode Polarization (v) 0.00 v 0.00 v 0.00 v 0.00 v 0.00 v 0.00 v A-B A-C A-D B B-A B-C Groundbed No. Current returned by each side of groundbed, Id (A) 0.26 A 0.36 A 0.39 A 0.39 A 0.26 A 0.30 A Total current output of one groundbed (A) 0.39 A Total current output of all groundbeds (A) Ex 0.296 v 0.148 v 0.085 v 0.085 v 0.296 v 0.252 v Ix 0.15 A 0.11 A 0.06 A 0.06 A 0.15 A 0.15 A * Total Potential Shifts at A, B, C & D Locations (v) 0.869 v 0.955 v * The limit ofactual Potential is -1.10 volt, the Anode Open Circuit Potential Groundbed Life Output/anode (A) put/anode (A) 0.032 Anode weight (kg) 27.27 Anode capacity(A-y/kg) 0.0840 Anode utilization factor 0.8 Life (y) 57.0. Nuricon Petroservices (Pte.) Ltd.. 0.052 27.27 0.0840 0.8 35.0. 0.032 27.27 0.0840 0.8 57.0.

(22) BHP BILLITON, PAKISTAN. Appendix - Design Calculations Rev1. Current Requirement Room Temp. Current Density (A/sqm) 0.025 Current adjustment for temp. (A/sqm/C) 0.001 Current Density at 40 Celsius (A/sqm) 0.040 Initial Coating Breakdown 0.05% Yearly increase in Coating Breakdown 0.02% Coating Breakdown after 20 years 0.55% Current density for coated pipe after 25 years (A/sqm) 0.00022 Initial Current Density for coated pipe (A/sqm) 0.00002 Average Current Density for coated pipe (A/sqm) 0.00012 Pipe OD (m) 0.168 Pipeline length (m) 30,000 Pipeline area (sqm) 15,860 Required current based on average density (A) 1.90 Anode Requirement (Zn) Anode consumption (kg/A-y) Utilization factor Required current output (A) Desired minimum life (y) Required anode metal weight (kg) Weight of one anode Required anodes based on weight (ea) Required No. of anodes based on current output Required No. of Groundbeds Proposed No. of anodes (ea) Recommended No. of groundbeds (ea). Nuricon Petroservices (Pte.) Ltd.. 11.90 0.80 1.90 25.00 707.73 27.27 26.00 40.00 4 48 4. CP of Dia. 6"x28 km Zamzama-Bhubak Condensate Pipeline.

(23) APPENDIX: DRAWINGS.

(24) Insulating Flange. Near Graveyard. Surge Diverter & Earthing Electrodes. 8375. Groundbed See Drg. No. SVGB-01 for details.. Pchem:07/002 N.T.S.. REF: SCALE:. Rev No:. 1. DESIGNED BY:. Rev. Dt:. MZT. Drawn by:. mzt Nov 6, 2006. Aug 10, 2006. CP-LAY-01. Design & Engg. of CP System for 6"x28 km Condensate Pipeline DRAWING NO:. Test Stations at every 2.5km. See drg. No. TP-01 for details. 8682. Parco Boundary Wall. Surge Diverter & Earthing Electrodes. Sheet No: 1 of 1. APPROVED BY:. MZT. SMZ. Within or outside the wall of PARCO Terminal. CHECKED BY:. BHP BILLITON. DATE:. Schematic arrangement of CP system along pipeline ROW. HONOR: NURICON PETROSERVICES (PTE.) LTD.. PETROCHEM. Groundbed See Drg. No. SVGB-01 for details.. PROJECT:. TITLE:. CLIENT:. Current Measuring Test Station See Drg. No. CMTS-01 for details.. 10943. Pipeline. Insulating Flange.

(25) 50x50x1500 Zn Anode. Native Backfill. Bore hole. 50x50x1500 Zn Anode. Anode Cable. Packaged Backfill. PACKAGE DETAIL. Cables in the trench to AJB. Di = Inactive Depth. NGL. Pipeline. Anode Cables. SCALE:. N.T.S.. Pchem:07/002. Rev No:. 1. DESIGNED BY:. Rev. Dt:. MZT. mzt Nov 06, 2006. Drawn by:. SVGB-LAY-01 REF:. DRAWING NO:. Design & Engg. of CP System for 6"x28km Condensate Pipeline July 31, 2006. PROJECT: DATE:. 6000. Sheet No: 1 of 1. APPROVED BY:. CHECKED BY:. BHP BILLITON. 6000. HONOR: NURICON PETROSERVICES (PTE.) LTD. TITLE: Typical Shallow Vertical Groundbed Details. CLIENT:. 5. All dimensions are in mm unless specified otherwise.. 4. Negative (50 sqmm)cable is to be cadwelded to the pipeline.. 3. Refer to drawing No. AJB-01 for Anode Junction Box details.. AJB. PETROCHEM. Negative Cable from AJB. 2. Refer to drawing No. CT-01 for trenching detail.. 1. See Detail A for anode burial.. NOTE. Anode Column. 6000. Anode Junction Box. MZT. SMZ.

(26) N.T.S.. Pchem:07/002 SCALE:. Rev No:. 1. DESIGNED BY:. Rev. Dt:. MZT. mzt Nov 6, 2006. Drawn by:. TYP-AJB-01 REF:. DRAWING NO:. Design & Engg. of CP System for 6"x28km Condensate Pipeline Aug 14, 2006. PROJECT: DATE:. Sheet No: 1 of 1. APPROVED BY:. CHECKED BY:. HONOR: BHP BILLITON NURICON PETROSERVICES (PTE.) LTD.. PETROCHEM. TITLE: Typical Anode Junction Box (AJB) Details. CLIENT:. MZT. SMZ.

(27) Bore hole. To Insulating Joint. NGL. Erthng Electrode Burial Detail. Native Backfill. Electrode Cables. 50x50x1500 Zn Earthing Electrodes. Packaged Backfill. BHP BILLITON. N.T.S.. Rev No:. DESIGNED BY:. Rev. Dt:. MZT. Drawn by:. Pchem:07/002 SCALE:. REF:. EE-01. July 31, 2006. DATE:. DRAWING NO:. Design & Engg. of CP System for 6"x28 km Condensate Pipeline. MZT. Sheet No: 1 of 1. APPROVED BY:. CHECKED BY:. Typical Burial Detail for Pair of Earthing Electrodes & their Cable Connections to Insulating Flanges. HONOR: NURICON PETROSERVICES (PTE.) LTD.. PETROCHEM. PROJECT:. TITLE:. CLIENT:. MZT. SMZ.

(28) HONOR: NURICON PETROSERVICES (PTE.) LTD.. PETROCHEM. N.T.S.. Pchem:07/002 SCALE:. Rev No:. 1. DESIGNED BY:. Rev. Dt:. MZT. mzt Nov 28 ,2006. Drawn by:. TYP-CCON-01 REF:. DRAWING NO:. Design & Engg. of CP System for 6"x28 km Condensate Pipeline July 31, 2006. PROJECT:. Sheet No: 1 of 1. APPROVED BY:. CHECKED BY:. BHP BILLITON. DATE:. TITLE: Typical Cable Connections to the pipeline. CLIENT:. MZT. SMZ.

(29) Pipeline. Detail AA. Cadweld. Concrete Block. NGL. See detail B on Sheet 2. A. N.T.S.. Rev No:. DESIGNED BY:. MZT Rev. Dt:. Drawn by:. Pchem:07/002. TP-01 REF:. DRAWING NO:. Design & Engg. of CP System for 6"x28km Condensate Pipeline July 31, 2006. PROJECT: DATE:. SCALE:. Pipeline. mzt. Sheet No: 1 of 2. APPROVED BY:. CHECKED BY:. HONOR: BHP BILLITON NURICON PETROSERVICES (PTE.) LTD.. PETROCHEM. TITLE: Test Post Details. CLIENT:. Cadweld. Cable. 1:2:6 Lean Concrete. 1m x 1m x 1m Concrete Block. Tinned Bush. A. MZT. SMZ.

(30) DETAIL B. Test Cable. Cable Strands. Cable Insulation. Heat shrink tube. N.T.S.. Rev No:. DESIGNED BY:. MZT Rev. Dt:. Drawn by:. Pchem:07/002 SCALE:. TP-01 REF:. DRAWING NO:. Design & Engg. of CP System for 6"x28km Condensate Pipeline July 31, 2006. PROJECT: DATE:. mzt. Sheet No: 2 of 2. APPROVED BY:. CHECKED BY:. HONOR: BHP BILLITON NURICON PETROSERVICES (PTE.) LTD.. PETROCHEM. TITLE: Test Post Details. CLIENT:. Tinned Bush. MZT. SMZ.

(31) N.T.S.. Rev No:. DESIGNED BY:. MZT Rev. Dt:. Drawn by:. Pchem:07/002 SCALE:. CT-01 REF:. DRAWING NO:. Design & Engg. of CP System for 6"x28km Condensate Pipeline July 31, 2006. PROJECT: DATE:. mzt. Sheet No: 1 of 1. APPROVED BY:. CHECKED BY:. HONOR: BHP BILLITON NURICON PETROSERVICES (PTE.) LTD.. PETROCHEM. TITLE: Typical Cable Trench Details. CLIENT:. Sand. Cables. MZT. SMZ. Backed Clay Tiles or Bricks. Warning Tape. Native Soil Backfill. NGL.

(32) Pchem:07/002 N.T.S.. SCALE:. Rev No:. DESIGNED BY:. Rev. Dt:. MZT. Drawn by:. CMTS-01 REF:. DRAWING NO:. July 31, 2006. DATE:. mzt. Sheet No: 1 of 1. APPROVED BY:. CHECKED BY:. BHP BILLITON. Design & Engg. of CP System for 6"x28 km Condensate Pipeline. Current Measuring Test Station. HONOR: NURICON PETROSERVICES (PTE.) LTD.. PETROCHEM. PROJECT:. TITLE:. CLIENT:. MZT. SMZ.

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