Direction of the swell and current

8.1.4.3.2.1 Bay of Campeche and Litoral Tabasco: The heading of the swell shall be considered with the most probable wave direction. A heading of S 11° 15‟ E, while the speed direction is parallel to the bathymetry (See figure 5). The barometry is considered uniform and regular.

8.1.4.3.2.2 North Zone and Lankahuasa: The heading of the swell shall be considered with the most probable wave direction. A heading of S 78° 45‟ W, while the current velocity direction is parallel to the bathymetry (See figure 7). The barometry is considered uniform and regular.

Figure 7. Direction of the swell and current for a return period of 100 years in North Zone and Lankahuasa

8.1.5 Design deliverable documentation

As minimum, three sets of copies shall be submitted at the end of the design project, both in print and electronic version (AutoCAD and Window environment) to the requesting Pemex area, as minimum the following:

Design bases:

 Basic information that involves all the aspects considered in the design:

 Calculation reports.

o Determination of thickness for internal pressure, high temperature and review for other effects.

o Flexibility analysis (riser, free span, crossings, interconnections, among others).

o Vortices analysis.

o Hydrodynamic stability analysis.

o Cathodic protection.

o Riser clamps design.

 Flowcharts.

 Particular specification sheets.

 Project drawings (when the operating conditions are higher than 90°C, a note shall be attached to each drawing indicating the following: after the pipeline construction is finished, a detailed geophysical survey shall be carried out, which provides the profile of the pipeline along the corridor as to detect free spans and irregularities for relevant stress analysis and avoid of upheaval or lateral buckling problems).

 Isometrics

 Work volume.

 Requisitions.

In addition, the user or PEMEX shall specify the technical basis of the bidding, the documentation and additional scope of the deliverable documentation and information.

9. RESPONSIBILITIES

9.1 Petróleos Mexicanos and subsidiary entities

9.1.1 Submitting the information required by this reference Standard to the design services provider for the development of the hired activities.

9.1.2 Granting the necessary document approvals before, during and at the end of the activities required by this reference Standard.

9.1.3 Carrying out or ensuring that the verification of compliance with the requirements of the reference Standard is carried out in a documented manner.

9.2 Pemex Exploration and Production Technical Standardization Sub-Committee

Receiving, analyzing and attending comments and improving suggestions to the requirements established in this standard to keep its content and requirements updated;

with the purpose to make sure that the operations carried out for the design of the subsea pipeline are executed in a precise, reliable and safe way.

9.3 Contractors

9.3.1 The contractor of the design services for subsea pipelines shall demonstrate that the company is experienced in the development of designs for similar project.

9.3.2 If applicable, it shall prove that it has qualified or specialist personnel available in the design of subsea pipelines area.

9.3.3 The contractor shall have sufficient equipment, instrumentation and appropriate infrastructure available for executing the activities and obligations required by this standard.

9.3.4 The contractor shall provide, to PEMEX representative, access to the facilities and information related with the activities required by this NRF during the validity of the contract.

10. CONCORDANCE WITH MEXICAN OR INTERNATIONAL STANDARDS

This standard is not in concordance with any Mexican or international standard.

11. BIBLIOGRAPHY

This standard is based on the technical bibliographic references indicated below:

ISO 13623:2000 Petroleum and natural gas industries-pipeline

API SPEC. 5L /ISO 3183 Specification for Line Pipe.

Forty-Fourth Edition, October 2007.

API RP 1111-1999 Recommended Practice for Design, Construction

API RP 1111-1993 Recommended Practice for Design, Construction, Operation and Maintenance of Offshore Hydrocarbon Pipelines. Second edition, November/1993.

ASME B31.G. Manual for Determining the

Remaining Strength of Corroded Pipelines, 1991.

ASME B31. 4-2006 Pipeline Transportation Systems for Liquid Hydrocarbons and other Liquids.

ASME B31. 8-2207 Gas Transmission and Distribution Piping Systems.

ASTM A 36/1 36M-05 Standard Specification for Carbon Structural Steel, 2005.

ASTM A 53/A 53M-06a Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc –Coated, Welded and Seamless, 2006.

Bea Robert Risk based criteria for Design and Requalification of Pipelines and Risers in the Bay of Campeche.

Det Norske Veritas (DNV) (Rules for Submarine Pipeline Systems, 1981/

Diavaz, S.A. de C.V. Inspecciones a ductos ascendentes en 1996, para

IMP Obtención de factores de

diseño por esfuerzos

IMP “Análisis de riesgo para

líneas submarinas

1997. Bay”. October 1997).

Oceanweather Update of Meteorological and Oceanographic Hindcast Data and Normal and Extremes, Bay of Campeche). Oceanweather, November / 1996.

Oceanweather Update of MetaOcean

Design Data for Zone North and Bay of Campeche, Oceanweather, July / 2006.

Especificación Técnica P.2.0721.04-2009

Sistemas de protección del ducto ascendente en la zona de mareas y oleaje para temperatura alta.

(Riser protection system in splash and wave zone for high temperatures”.

12.

Annex A. Oceanographic information for the Gulf of Mexico

.

Figure A-1. Velocities of current on the surface at 50% and 95% depth for Bay of Campeche and Litoral Tabasco (Return period of 10 years)

Figure A-2. Velocities of current on the surface at 50% and 95% depth for North Zone and Lankahuasa (Return period of 10 years)

Figure A-3. Maximum and significant wave height for Bay of Campeche and Litoral Tabasco (Return period for 10 years)

Note: Only applicable for hydrodynamic stability.

Figure A-4. Maximum and significant wave height for North Zone and Lankahuasa (Return Period of 10 years)

Note: Only applicable for hydrodynamic stability.

Figure A-5. Velocities of current on the surface at 50% and 95% depth for Bay of Campeche and Litoral Tabasco (Return period of 100 years)

Figure A-6 (Velocities of current on the surface at 50 and 95% depth for north Zone and Lankahuasa (Return period of 100 years)

Figure A-7. Maximum and significant wave height of Bay of Campeche and Litoral Tabasco (Return period of 100 years)

NOTE: Only applicable for hydrodynamic stability.

Figure A-8. Maximum and significant wave height for North Zone and Lankahuasa (Return period of 100 years)

NOTE: Only applicable for hydrodynamic stability.

Annex B. Conversion of the gas and light oil production in Thousands of Heavy Oil Barrels Daily Equivalent

.

1) The production of the gas pipelines shall be converted into Thousands of Heavy Oil Barrels Daily Equivalent using the following formula:

1 MBCPED= 139,798 m3 (4, 937 million cubic feet) of gas per day.

2) The production of the light oil pipelines shall be convert into Thousands of Heavy Oil Barrels Daily Equivalent using the following formula:

1 MBCPED = 140,83m³ (140, 83 m²) 0,886 thousands of barrels) of light oil per day.