TABLE OF CONTENT TABLE OF CONTENT TABLE OF CONTENT TABLE OF CONTENT 1. Scope and Definisions 1. Scope and Definisions 1. Scope and Definisions 1. Materials and Equipment
2. Design 2. Design 2. Design 2. Welding
3. Materials 3. Materials 3. Materials 3. Piping System Component and
Fabrica-4. Dimensional Requirements 4. Dimensional Requirements 4. Dimensional Requirements tion Details
5. Fabrication, Assembly and Erection 5. Fabrication, Assembly and Erection 5. Construction, Welding and Assembly 4. Design, Installation and Testing 6. Examination, Inspection and Testing 6. Inspection and Testing 6. Inspection and Testing 5. Operation and Maintenance Procedure
7. Non Metallic Piping and Piping Lined 7. Operation and Maintenance Procedure 6. Corrosion Control
with Non Metal 8. Corrosion Control 7. Miscellaneous
-Central and district heating plants 8. Piping for Category M-Fluid Sevice 8. Offshore Gas Transmission 9. High Pressure Piping
SCOPE SCOPE SCOPE SCOPE
Power & auxiliary service piping system : All Fluid piping : Piping Transporting Liquid : Gas Transmission & Distribution System : - Electric generation system - Chemicals - Oil, condensate, natural gasoline, NGL, - Gas pipeline
- Industrial and Institutional plants - Petroleum product Liquid anhydrous ammonia & Liquid - Gas compressor station - Gas, Steam, Air and Water Petroleum product between Tank farms, - Gas metering and regulation station - Fluidized solid Natural Gas Processing plant, Refinery, - Gas main and service line - Refrigerant Station, Ammonia Plants, Terminals.
WALL THICKNESS CALCULATION WALL THICKNESS CALCULATION WALL THICKNESS CALCULATION WALL THICKNESS CALCULATION
t
m =t
+ At
m =t
+ ct
m =t
+ At
m =t
+ Ca
t
= P Dt
= P Dt
= Pi Dt
= P D2( SE + Py ) 2( SE + PY ) 2 S 2 S F E T
SE = Stress Value (Appendix - A) S = Stress Value (Table - A1) S = 0.72 x E x SMYS S = SMYS y = Temperature derating factor E = Joint efficiency A = Allowance for threading & grooving F = Design factor A = Allowance for threading & grooving Y = Temperature derating factor and corrosion E = Joint efficiency
and corrosion c = Allowance for threading & grooving T = Temperature derating factor and corrosion
Notes : Notes : Notes : Notes :
Under thickness tolerance to be included Under thickness tolerance to be included Under thickness tolerance to be included Under thickness tolerance to be included Allowance for threading & groving and
Common materials wt tolerance corrosion has to be included
A 53 wt tolerance (-)12.5 % F = 0.80 (Class 1 Div. 1)
A 106 wt tolerance (-)12.5 % F = 0.72 (Class 1 Div. 2)
A 671 wt tolerance (-)0.01 inch F = 0.60 (Class 2)
API 5L wt tolerance (-)12.5 % (Table - 9 ) F = 0.50 (Class 3)
A 312 wt tolerance (-) % F = 0.40 (Class 4)
HYDROTEST REQUIREMENTS HYDROTEST REQUIREMENTS HYDROTEST REQUIREMENTS HYDROTEST REQUIREMENTS
Not less than 1.50 times Design Pressure, Not less than 1.50 times Design Pressure, Not less than 1.25 times Design Pressure, Min. 1.25 x MOP (Class 1 Div. 1), 2 hrs min minimum of 10 minutes at least 10 minutes at least 4 hours Min. 1.10 x MOP (Class 1 Div. 2), 2 hrs min
Min. 1.5 x MOP (Class 2), 2 hrs min Min. 1.5 x MOP (Class 3 & 4), 2 hrs min
PWHT REQUIREMENTS PWHT REQUIREMENTS PWHT REQUIREMENTS PWHT REQUIREMENTS
For CS, nominal thickness larger than 3/4" For CS, nominal thickness larger than 3/4" For CS, nominal thickness larger than 1 1/4" For CS, nominal thickness larger than 1 1/4" (for branch connection thickness through (for branch connection use Header to (for branch connection use Header to the weld @ any plane is more than 1 1/2") determine thickness) determine thickness)
(Table 331.1.1 and Para 331.1.3) (for thickness less than 1 1/2" may be (no waiver close for onshore para 825.2) accepted if min.preheat 93o C is used)
RADIOGRAPHIC REQUIREMENTS RADIOGRAPHIC REQUIREMENTS RADIOGRAPHIC REQUIREMENTS RADIOGRAPHIC REQUIREMENTS
Less than 400o
C, Visual Minimum 5% Circum butt weld examined Minimum 10% of weld to be radiograph Minimum 10% of weld @ Class 1 400o
C and over, RT for larger NPS 2" fully by random radiography Min. 90% radiograph for weld at populated Minimum 15% of weld @ Class 2 area, heavy traffic and offshore. Minimum 40% of weld @ Class 3 Minimum 75% of weld @ Class 4 100% of weld @ compression, crossing and offshore.
Acceptance criteria & procedure API 1104 Acceptance criteria & procedure API 1104
WELDING PROCEDURE & QUALIFICATION WELDING PROCEDURE & QUALIFICATION WELDING PROCEDURE & QUALIFICATION WELDING PROCEDURE & QUALIFICATION To follow ASME Section IX To follow ASME Section IX To follow API 1104 & ASME Section IX To follow API 1104 & ASME Section IX
TEMPERATURE RANGE TEMPERATURE RANGE TEMPERATURE RANGE TEMPERATURE RANGE
For CS (-)20o F -- 800o F For CS (-)20o F -- 800o F For CS (-)20o F -- 250o F For CS (-)20o F -- 400o F
MATERIAL COMPARISON MATERIAL COMPARISON MATERIAL COMPARISON MATERIAL COMPARISON
A179 (Hex & Condenser Tube) - Listed A179 - Listed A179 - Not Listed A179 - Not Listed A312 (Austenitic Stainless) - Not Listed A312 - Listed A312 - Not Listed A312 - Not Listed A333 (Low Temperature Steel) - Listed A333 - Listed A333 - Not Listed A333 - Listed
ASME B31.3 ASME B31.1
ANHYDROUS AMMONIA AND ALCOHOLS " HYDROCARBONS, LIQUID PETROLEUM GAS
" LIQUID TRANSPORTATION SYSTEM FOR " GAS TRANSMISSION AND DISTRIBUTION PIPING SYSTEM"
PIPING CODE COMPARISON (PLANT PIPING & ONSHORE PIPING)
" PROCESS PIPING " " POWER PIPING "
ASME B31.3 ASME B31.1
ANHYDROUS AMMONIA AND ALCOHOLS " HYDROCARBONS, LIQUID PETROLEUM GAS
" LIQUID TRANSPORTATION SYSTEM FOR " GAS TRANSMISSION AND DISTRIBUTION PIPING SYSTEM"
PIPING CODE COMPARISON (PLANT PIPING & ONSHORE PIPING)
" PROCESS PIPING " " POWER PIPING "
ASME B31.4 ASME B31.8
SPECIFIC REQUIREMENT SPECIFIC REQUIREMENT SPECIFIC REQUIREMENT SPECIFIC REQUIREMENT
Fluid service : Block & Isolating Valves : Block & Isolating Valves : - Normal Fluid Main Line block valves shall be installed Sectionalizing valve are required : Base using Chapter I to VII upsteram side of major river crossing and Spacing 32 km @ Class 1 - Category D public water supply reservoirs. Spacing 24 km @ Class 2 Non flameable & non toxic For down stream install block valve or Spacing 16 km @ Class 3 Design pressure max. 150 psig check valve. Spacing 8 km @ Class 4 Design temp. (-) 20o
F - 366o
F Block valves shall be installed 12 km spa- (May be adjusted slighly to permits more - Category M cing for LPG in industrial, commercial and accesable location)
Dangerous fluid wich base Code not industrial area. Blowdown valves for depressurizing
enough. line section should be installed on each
- HP fluid service side of the sectionalizing valves)
Owner choice to use Chapter IX Area classification :
Class 1 div. 1 : Mountain, farmland (0 - 10 bldgs), Ht = 1.25 MOP Class 1 div. 2 : Mountain, farmland (0 - 10 bldgs), Ht = 1.10 MOP Class 2 : Industrial & country area. (11 - 15 bldgs)
Class 3 : Shopping Centre & Recidential (more than 45 bldgs) Class 4 : Multistory & Heavy traffic
TABLE OF CONTENT TABLE OF CONTENT TABLE OF CONTENT
1. Scope and Definisions
1. Materials and Equipment
1. General
2. Design
2. Welding
2. Design Philosophy
3. Materials
3. Piping System Component and Fab. details
3. Design Premise and Documentation
4. Dimensional Requirements
4. Design, Installation and Testing
4. Loads
5. Construction, Welding and Assembly
5. Operation and Maintenance Procedure
5. Design Criteria
6. Inspection and Testing
6. Corrosion Control
6. Line Pipe
7. Operation and Maintenance Procedure
7. Miscellaneous
7. Components and Assembly
8. Corrosion Control
8. Offshore Gas Transmission
8. Corrosion Protection and Weigh Coating
A800 Offshore Gas Transmission
9. Installation
A810 Materials and Equipment
10. Operation, Inspection and Repair
A820 Welding Offshore Pipeline
11. Requalification
A830 System Component & Fab. details
10. Comentary (Informative)
A840 Design, Installation and Testing
A850 Operation and Maintenance
A860 Corrosion control of Offshore Pipelines
A800 Offshore Gas Transmission
SCOPE
SCOPE SCOPEPiping Transporting Liquid :
Gas Transmission & Distribution System :
Submarine pipeline system for the
- Oil, condensate, natural gasoline, NGL,
- Gas pipeline
transportation of fluids.
Liquid anhydrous ammonia & Liquid
- Gas compressor station
Petroleum product between Tank farms,
- Gas metering and regulation station
Natural Gas Processing plant, Refinery,
- Gas main and service line
Station, Ammonia Plants, Terminals.
WALL THICKNESS CALCULATION WALL THICKNESS CALCULATION WALL THICKNESS CALCULATION
t m =
t + A
S h
< F1 S T
t 1 =
t - tfab - tcor
t =
P D
t =
P D
Pli - Pe
< Pb ( t1 )
2( SE + Py )
2( SE + PY )
gSc x gm
S = 0.72 x E x SMYS
S = SMYS
A = Allowance for threading & grooving and
F
1= Design factor
P
b,s( t
1) =
2 t1
x
f
y x2
corrosion
T = Temperature derating factor
D - t1
V 3
Yielding
P
b,u( t
1) =
2 t1
x
f
u x2
D - t1
1.15
V 3
Bursting
P
li=
Pd x ginc + rcont x g x h
Notes :
Notes :
Under thickness tolerance already included
Under thickness tolerance already included
t
1= wall thickness
Allowance for threading & grooving and
t = nominal wall thickness
corrosion has to be included
t
fab= fabrication thickness tolerance
F = 0.72 (Pipeline)
t
cor= corrosion allowance
F = 0.50 (Platform piping & riser)
P
li= local incidental pressure
P
e= external pressure
f
y= SMYS
f
u= SMTS
g
inc= 1.05 ……1.10
1.1
g
SC= 1.046 …..1.138
1.138
g
m= 1.15 ….…1.00
1
HYDROTEST REQUIREMENTS HYDROTEST REQUIREMENTS HYDROTEST REQUIREMENTS
Not less than 1.25 times Design Pressure,
Min. 1.25 x MOP (Pipeline), 2 hrs min
Normal
P
lt> = 1.05 x P
li, 24 hrs
at least 4 hours
Min. 1.40 x MOP (Platform Piping & Riser),2 hrs
Low
P
lt> = 1.03 x P
li, 24 hrs
" LIQUID TRANSPORTATION SYSTEM FOR HYDROCARBONS, LIQUID PETROLEUM GAS
ANHYDROUS AMMONIA AND ALCOHOLS "
" GAS TRANSMISSION AND DISTRIBUTION PIPING SYSTEM "
PIPING CODE COMPARISON (OFFSHORE PIPELINE)
ASME B31.4
ASME B31.8
DNV 2000
" OFFSHORE STANDARD OS - F101 SUBMARINE PIPELINE "
" LIQUID TRANSPORTATION SYSTEM FOR HYDROCARBONS, LIQUID PETROLEUM GAS
ANHYDROUS AMMONIA AND ALCOHOLS "
" GAS TRANSMISSION AND DISTRIBUTION PIPING SYSTEM "
PIPING CODE COMPARISON (OFFSHORE PIPELINE)
ASME B31.4
ASME B31.8
DNV 2000
" OFFSHORE STANDARD OS - F101 SUBMARINE PIPELINE "
PWHT REQUIREMENTS PWHT REQUIREMENTS PWHT REQUIREMENTS
For CS, nominal thickness larger than 1 1/4"
For CS, nominal thickness larger than 1 1/4"
For CS, nominal thickness larger than 50 mm
(for branch connection use Header to
(for branch connection use Header to
unless CTOD testing shows acceptable
determine thickness)
determine thickness)
values in the as weld condition
(for thickness less than 1 1/2" may be
(may be waive with demonstration of WPS)
accepted if min.preheat 93
oC is used)
RADIOGRAPHIC REQUIREMENTS RADIOGRAPHIC REQUIREMENTS RADIOGRAPHIC REQUIREMENTS
Minimum 10% of weld to be radiograph
100% of weld
100% of weld
Min. 90% radiograph for weld at populated
area, heavy traffic and offshore.
Acceptance criteria and Procedure API 1104
Acceptance criteria and Procedure API 1104
Acceptance criteria and Procedure to follow
this Code
WELDING PROCEDURE & QUALIFICATION WELDING PROCEDURE & QUALIFICATION WELDING PROCEDURE & QUALIFICATION
