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Welded Steel Pipe
API 5L Welded Pipe
Grade: API 5L grade b, x42, x46, x52, x56, x60, x65, x70, x80
Manufacturing Types: erw, lsaw, ssaw
Range of Thickness: sch10 to sch160
Ends Type: beveled ends, plain ends
Range of Length: 20ft, 40ft or customized
Surface Appearances: natural, varnished, black painting, 3pe, fbe, etc
Range of Thickness: SCH 10 to SCH 160
Protection Caps in plastic or iron available
Standard
Specification
API 5L welded steel pipe types on oil pipelines include spiral submerged arc welded pipe (SSAW), longitudinal submerged arc welded pipe (LSAW), and electric resistance welded pipe (ERW).
There are many grades of raw materials for API 5L steel pipes like: GR.B, X42, X46, X52, X56, X60, X70, X80, etc. ANSI / API 5L specifies the manufacture of two product levels (PSL1 and PSL2).
Pipeline pipes should be subjected to water pressure tests one by one, and the standard does not provide for non-destructive substitution of water pressure. This is also a big difference between API standards and Chinese standards. API 5l psl1 does not require non-destructive inspection, API 5l psl2 should be non-destructive inspection one by one.
Applied for petroleum and natural gas industries, oil industries requirements for transportation and are expected working in extreme situations, low and high temperatures, corrosion resistance for corrosive environments, and for sour services in H2S conditions.
API 5L Welded Line Pipe Range
API 5L Welded Pipe Specification |
API 5L / ISO 3183 Hot Rolled. |
API 5L Welded Pipe Grades |
API 5L Grade B PSL1, PSL 2 / API 5L X42 PSL1, PSL 2 / API 5L X46 PSL1, PSL 2 / API 5L X52 PSL1, PSL 2 / API 5L X56 PSL1, PSL 2 / API 5L X60 PSL1, PSL 2 / API 5L X65 PSL1, PSL 2 / X70 PSL1, PSL 2 / API 5L X70 PSL1 / PSL2 / API 5L X80 PSL1, PSL 2 / ISO 3183 L245 PSL1, PSL 2, ISO 3183 L290 PSL1, PSL 2, ISO 3183 L320 PSL1, PSL2, ISO 3183 L360 PSL1, PSL 2, ISO 3183 L390 PSL1, PSL 2, ISO 3183 L415 PSL1, PSL 2, ISO 3183 L450 PSL1, PSL 2, ISO 3183 L485 PSL1, PSL 2 |
API 5L Welded Pipe Type |
LSAW Pipes (Longitudinal Submerged Arc Welded Pipes ) |
API 5L Welded Pipe Outer Diameter Size |
12" NB to 150" NB (Nominal Bore Size) |
API 5L Welded Pipe Wall Thickness |
Schedule 20 to Schedule XXS (Heavier On Request) Up to 250 mm Thickness |
API 5L Welded Pipe Length |
5 to 7 Meters, 09 to 13 Meters, Single Random Length, Double Random Length And Customize Size. |
API 5L Welded Pipe Ends |
Plain Ends / Beveled Ends / Coupling |
API 5L Welded Pipe Delivery Conditions |
As Rolled, Normalizing Rolled, Thermomechanical Rolled / Formed, Normalizing Formed, Normalized and Tempered / Quenched and Tempered - BR / N / Q /T |
API 5L Welded Pipe Coating |
Epoxy Coating / Colour Paint Coating / 3LPE Coating. |
API 5L Welded Pipe Other Testing |
NACE MR0175, NACE TM0177, SOUR SERVICE, NACE TM0284, PWHT, HIC TEST, SSC TEST, SWC, H2 SERVICE, IBR, IPS-M-PI190, IPS-M-PI-221 APPENDIX G Etc. |
API 5L Welded Pipe Dimension |
All Pipes Is Manufactured and Inspected / Tested to the Relevant standards including ASTM, ASME, API. |
API 5L Welded Pipe Value Added Services |
Draw / Expansion / Machining / Sand Blasting / Shot Blasting / Galavanizing / Heat Treatment |
API 5L Welded Pipe Packaging |
Loose / Bundle / Wooden Pallet / Wooden box-a / Plastic Cloth Wraps / Plastic End Caps / Beveled Protector |
API 5L Welded Pipe Shipment & Transportation |
By Road - Truck / Train, By Sea - Break-bulk Conventional Vessel / FCL (Full Container Load) / LCL (Less Container Load) / 20 Feet Container / 40 Feet |
API 5L Welded Pipe Material Test Certificate |
Manufacturer Test Certificate As Per EN10204 3.1, 3.2 / Laboratory Test Certificate From NABL Approved Lab./ Under Third Party Inspection Agency Like SGS, TUV, DNV, LLOYDS, ABS ETC |
API 5l Weldedline Pipe Psl1 Chemical Properties
|
Mass Fraction, based upon heat and product analyses |
|||||||
Steel grade |
C |
Mn |
P |
S |
V |
NB |
Ti |
|
(Steel name) |
max |
max. |
min. |
max. |
max. |
max. |
max. |
max. |
L175 or A25 |
0.21 |
0.60 |
|
0.030 |
0.030 |
- |
|
|
L175P or A25P |
0.21 |
0.60 |
0.045 |
0.800 |
0.030 |
|
|
|
L210 or A |
0.22 |
0.90 |
- |
0.030 |
0.030 |
- |
- |
- |
L245 or B |
0.26 |
1.20 |
|
0.030 |
0.030 |
c,D |
c,D |
D |
L290 or X42 |
0.26 |
1.30 |
|
0.030 |
0.030 |
D |
D |
D |
L320 or X46 |
0.26 |
1.40 |
- |
0.030 |
0.030 |
D |
D |
D |
L360 or X52 |
0.26 |
1.40 |
|
0.030 |
0.030 |
D |
D |
D |
L390 or X56 |
0.26 |
1.40 |
|
0.030 |
0.030 |
D |
D |
D |
L415 or X60 |
0.26 |
1.40 |
- |
0.030 |
0.030 |
f |
f |
f |
L450 or X65 |
0.26 |
1.45 |
|
0.030 |
0.030 |
f |
f |
f |
L485 or X70 |
0.26 |
1.65 |
|
0.030 |
0.030 |
f |
f |
f |
API 5l Welded Line Pipes PSL2 Chemical Composition
Mass Fraction, based upon heat and product analyses |
Carbon Equivalent % max |
||||||||||
Steel grade |
C |
Si |
Mn |
P |
S |
V |
Nb |
Ti |
Other |
Ce |
CE |
L245 or Bm |
0.22 |
0.45 |
1.20 |
0.025 |
0.015 |
0.05 |
0.05 |
0.04 |
e,l |
0.43 |
0.25 |
L290M or X42M |
0.22 |
0.45 |
1.30 |
0.025 |
0.015 |
0.05 |
0.05 |
0.04 |
e,l |
0.43 |
0.25 |
L320M or X46M |
0.22 |
0.45 |
1.30 |
0.025 |
0.015 |
0.05 |
0.05 |
0.04 |
e,l |
0.43 |
0.25 |
L360 or X52M |
0.22 |
0.45 |
1.40 |
0.025 |
0.015 |
D |
D |
D |
e,l |
0.43 |
0.25 |
L390 or X56M |
0.22 |
0.45 |
1.40 |
0.025 |
0.015 |
D |
D |
D |
,l |
0.43 |
0.25 |
L415 or X60M |
0.12 |
0.45 |
1.60 |
0.025 |
0.015 |
g |
g |
g |
,l |
0.43 |
0.25 |
L450 or X65M |
0.12 |
0.45 |
1.60 |
0.025 |
0.015 |
g |
g |
g |
,l |
0.43 |
0.25 |
L485 or X70M |
0.12 |
0.45 |
1.60 |
0.025 |
0.015 |
g |
g |
g |
,l |
0.43 |
0.25 |
API 5L Welded Pipes Comparative Specifications
Grade Range |
A25 Through X70 |
Gr B Through X80 |
Table 1 |
Size Range |
0.405 Through 80 |
4-2/1 Through 80 |
Table 1 |
Type Of Pipe Ends |
Plain-End, Threaded-end, Bevelled-End, Special Coupling Pipe |
Plain-EnD |
Table 1 |
Seam Welding |
All Methods Continous Welding Limited to Grade A25 |
All Methods Except Continous And Laser Welding |
Table 1 |
Electric Welds: Welder Frequency |
No Minimum |
100 Khz Minimum |
5.1.3.3.2 |
Heat Treatments of Electric Welds |
Required For Grades > X42 |
Required For All Grades (Gr B Through X80) |
5.1.3.3.1; J.3.3.2:6.2.7 |
Chemistry: Max C For Seamless Pipe |
0.28% For Grades > Gr B |
0.24% |
tables 2a, 2b |
Chemistry: Max C For Welded Pipe |
0.26% For Grades > Gr B |
0.22% |
tables 2a, 2b |
Chemistry: Max P |
0.03% |
0.03% |
Tables 2a, 2b |
Chemistry: Max S |
Only When Purchases Specifies Sr18 |
0.02% |
Tables 2a, 2b |
Carbon Equivalent |
None |
Maximum Required for Each Grade |
4.2:4.3:6.1.3: Sr15.1 |
Yield Strength, Maximum |
None |
Maximum for Each Grade |
tables 3a, 3b |
UTS, Maximum |
None RequireD |
Maximum For Each Grade |
Tables 3a, 3b |
Fracture Toughness |
Only When Purchaser Specifies Sr4 |
Required For All Grades |
6.2.6; 9.3.5: 9.8.4; 9.10.7; |
Non-destructive Inspection of Seamless Pipes |
PermitteD |
sr4 Mandatory |
table 14 9.7.2.6 |
Repair By Welding of Pipe Body, Plate And Skelp |
Permitted By Agreement |
ProhibiteD |
5.3.2;9.7.6: B.1;b.2 |
Certification |
Certificates When Specified Per Sr15 |
ProhibiteD |
4.3;9.7.4.4;9.7.6;b.1.2;b.4 |
Traceability |
Traceable Only Until All Tests are Passed Unless Sr15 Is SpecifieD |
Certificates (Sr15.1) Mandatory |
12.1 |
CHEMICAL REQUIREMENTS for API 5L Steel Pipe
Permissible Variations for Seamless and Welded API 5L Steel Pipe
|
Grade A, B, A25 |
X42 through X80 |
NPS 2-1/2 and smaller --Seamless and Welded, % |
+20 -- 12.5 |
+15 -- 12.5 |
NPS 3 --Seamless and Welded, % |
+18 -- 12.5 |
+15 -- 12.5 |
NPS 4 through 18 --Seamless and Welded, % |
+15 -- 12.5 |
+15 -- 12.5 |
NPS 20 and larger -- Welded, % |
+17.5 -- 10.0 |
+19.5 -- 8.0 |
NPS 20 and larger -- Seamless, % |
+15.0 -- 12.5 |
+17.5 -- 10.0 |
Process
There are 3 welding types: ERW (Electric Resistance Welding), LSAW (Longitudinally Submerged Arc Welding), and SSAW (Spirally Submerged Arc Welding) welding types.
ERW pipe is a type of Resistance pipe stands apart from welded pipe and DC welded pipe in two different manners as listed below. Based on the welding frequency, the IF welding for low frequency and the ultra-IF welding for high frequency. In case of thin-walled pipe, there is a high frequency weld used typically in case of contact welding and induction welding. When the usage is for a small-diameter pipe, they make use of DC welding. There is a high frequency welding process used to manufacture pipes that are comprehensive and is of ERW type. For oil and gas storage, the best recommended type is ERW longitudinal, owing to its quality, ease of transport and cost.
Both LSAW pipe and SSAW pipe are SAW pipe (Submerged Arc Welding Steel Pipe), is manufactured by making use of a submerged arc soldering process for preparing the steel and it results in high density pipe. Owing to the flux layer, there is no instant heat loss and it gets concentrated near the weld. It results in high quality, highly efficient arc and smoke, which finds intensive usage in pressure vessels, pipe manufacturing, beams, fluids, steel works etc. SAW pipe find its main usage in LSAW pipe, which is Longitudinally Submerged Arc Welding pipe.