GNEE PIPE is one of the leading oil & gas pipeline, structure & scaffolding pipe manufacturer and stockist in China.
18+ years exporting experience can offer you a comfortable and high quality service.
Following is our main products' brief introduction for your reference.
| Product | Stainless steel pipe | Seamless steel pipe | ERW steel pipe | LSAW steel pipe | SSAW steel pipe |
| O.D | 1/4"-26" | 1/8" - 30" | 1/8" - 28" | 12" - 64" | 8" -80" |
| W.T | 0.5 - 70mm | 1.24 - 63.5mm | 1.65 - 50mm | 5 - 50mm | 3.2 - 50mm |
| Main Standard | ASTM A312,API 5L, ASTM A106/ A53, DIN1629, ASTM A179, ASTM A192, EN10025,JIS G3444 AS1163, ASTM A252 etc | ||||
| Material | TP304/TP304L, TP316/316L, GR.B,X42 ,X46,X52,X56,X60,X65,X70, Gr.A/B/C, S235/S275JR/S355JR,Stk290, Stk400, Stk500, Stk490, Stk540,C250/C350, Gr.1/Gr.2/Gr.3 | ||||
| Clients:ADNOC, Shell Oil, CNPC, SINOPEC, SASOL, PETROSRAS(Brazil), SWCC, etc. | |||||
ASTM A312 Stainless Steel Pipe
ASTM A312 pipe is the general use stainless steel pipe applied in different industries. It covers diameters from 1/8" to 30" and thickness from SCH 10S to SCH 80S. Common use material grades are TP304/304L, TP316/316L.
Standard: ASTM A312, ASME SA312
Common Use Grades: TP304, 304L, 316, 316L
Diameters: From 1/8 inch to 30 inch.
Wall thickness: SCH 10S, 40S, 80S
Length: 20ft, 40ft, Single Random Length, Double Random Length and Customized
GNEE PIPEl supplies ASTM A312 TP304/304L, TP316/316L Stainless Steel Pipe in Welded and Seamless.
API 5L Pipe Specification
Keywords: API 5L, GR.B, X42, X46, X52, X56, X60, X65, X70, API 5L Standard PSL1/ PSL2, API 5L Line Pipe Spec.
API 5L Standard aims to gas and water in oil and gas industry for reference, which is used for seamless steel pipe and welded steel pipe, including common port and port, pipe socket port and direct stream tube (TFL) and port has for a particular connection tube processing.
API 5L Standard is including steel grade (GR.B,X42 ,X46,X52,X56,X60,X65,X70).
Level: PSL1, PSL2, NACE and Sour Service (API 5L X70MS/QS)
OD range: Seamless up to 24 inch, welded up to 48 inch.
Wall Thickness Schedule: Schedule 20, SCH 40, SCH STD, SCH XS, SCH 80, SCH 120, SCH XXS, SCH 160
Length: 20ft (6m), 40ft (12m), SGL (Single Random Length), DRL (Double Random Length)
Pipe Coatings: Black Painting, Oil Varnished, FBE, 3PE, Lined and Clad
Differences between API 5L PSL1 and PSL2:
API 5L Standard has the provisions of the two product specification levels (PSL1 and PSL2). The two kinds of PSL grade level of the product to the standard stipulated in the technical requirements of different, PSL2 of carbon equivalent, notch toughness, maximum yield strength and tensile strength have mandatory requirements.
PSL is short for product specification level. API 5L Line pipe product specification level is divided into PSL1 and PSL2, also can say quality grades are divided into PSL1 and PSL2. PSL2 above PSL1, these two levels is not only different inspection requirements, and chemical composition, mechanical performance requirements are different, so the order in API 5 l, the terms of the contract in addition to indicate the specifications and grade of steel usually indicators, must also indicate the level of product specification, namely PSL1 or PSL2.
PSL2 in chemical composition, tensile properties, impact energy, and nondestructive testing which strict in PSL1 indicators. PSL1 does not require impact performance, PSL2 all except x80 grade steel, full size 0 ℃ average Akv: longitudinal p j, 41 lateral acuity 27 j.Average grade X80 steel, full size 0 ℃ Akv: longitudinal 101 j, or lateral acuity 68 j. Line pipe should do water pressure test, and the standards are not allowed to nondestructive generation of hydraulic pressure, which is also the API standard and one big difference between our country standard.PSL1 does not require the nondestructive inspection, PSL2 shall by a nondestructive examination.
Manufacturing process:
Seamless pipe: produced by hot rolling or cold drawing process, suitable for high pressure and small diameter pipes, but the cost is higher.
Welded pipe: including high frequency electric resistance welding (ERW) and submerged arc welding (SAW), which dominates the field of large diameter (such as ≥24 inches) and has lower cost.
API 5L Standard Mechanical properties:
| Standard | Steel Grade | Yield Strength(MPa) | Tensile Strength(MPa) |
| API 5L | PSL1 | ||
| A25 | 172 | 310 | |
| A | 207 | 331 | |
| B | 241 | 414 | |
| X42 | 290 | 414 | |
| X46 | 317 | 434 | |
| X52 | 359 | 455 | |
| X56 | 386 | 490 | |
| X60 | 414 | 517 | |
| X65 | 448 | 531 | |
| X70 | 483 | 565 | |
| PSL2 | |||
| 241-448 | 414-758 | ||
| B | 290-496 | 414-758 | |
| X42 | 317-524 | 434-758 | |
| X46 | 359-531 | 455-758 | |
| X52 | 386-544 | 490-758 | |
| X56 | 414-565 | 517-758 | |
| X60 | 448-600 | 531-758 | |
| X65 | 483-621 | 565-758 | |
| X70 | 552-690 | 621-827 | |
Delivery condition:
| PSL | Delivery Condition | Pipe grade |
|---|---|---|
| PSL1 | As-rolled, normalized, normalizing formed | A |
| As-rolled, normalizing rolled, thermomechanical rolled, thermo-mechanical formed, normalizing formed, normalized, normalized and tempered or if agreed Q&T SMLS only | B | |
| As-rolled, normalizing rolled, thermomechanical rolled, thermo-mechanical formed, normalizing formed, normalized, normalized and tempered | X42, X46, X52, X56, X60, X65, X70 | |
| PSL 2 | As-rolled | BR, X42R |
| Normalizing rolled, normalizing formed, normalized or normalized and tempered | BN, X42N, X46N, X52N, X56N, X60N | |
| Quenched and tempered | BQ, X42Q, X46Q, X56Q, X60Q, X65Q, X70Q, X80Q, X90Q, X100Q | |
| Thermomechanical rolled or thermomechanical formed | BM, X42M, X46M, X56M, X60M, X65M, X70M, X80M | |
| Thermomechanical rolled | X90M, X100M, X120M | |
| The suffice (R, N, Q or M) for PSL2 grades, belongs to the steel grade |
Chemical requirements:
Chemical Composition for PSL 1 pipe with t ≤ 0.984"
| Steel Grade | Mass fraction, % based on heat and product analyses a,g | ||||||
|---|---|---|---|---|---|---|---|
| C | Mn | P | S | V | Nb | Ti | |
| max b | max b | max | max | max | max | max | |
| Seamless Pipe | |||||||
| A | 0.22 | 0.9 | 0.3 | 0.3 | – | – | – |
| B | 0.28 | 1.2 | 0.3 | 0.3 | c,d | c,d | d |
| X42 | 0.28 | 1.3 | 0.3 | 0.3 | d | d | d |
| X46 | 0.28 | 1.4 | 0.3 | 0.3 | d | d | d |
| X52 | 0.28 | 1.4 | 0.3 | 0.3 | d | d | d |
| X56 | 0.28 | 1.4 | 0.3 | 0.3 | d | d | d |
| X60 | 0.28 e | 1.40 e | 0.3 | 0.3 | f | f | f |
| X65 | 0.28 e | 1.40 e | 0.3 | 0.3 | f | f | f |
| X70 | 0.28 e | 1.40 e | 0.3 | 0.3 | f | f | f |
| Welded Pipe | |||||||
| A | 0.22 | 0.9 | 0.3 | 0.3 | – | – | – |
| B | 0.26 | 1.2 | 0.3 | 0.3 | c,d | c,d | d |
| X42 | 0.26 | 1.3 | 0.3 | 0.3 | d | d | d |
| X46 | 0.26 | 1.4 | 0.3 | 0.3 | d | d | d |
| X52 | 0.26 | 1.4 | 0.3 | 0.3 | d | d | d |
| X56 | 0.26 | 1.4 | 0.3 | 0.3 | d | d | d |
| X60 | 0.26 e | 1.40 e | 0.3 | 0.3 | f | f | f |
| X65 | 0.26 e | 1.45 e | 0.3 | 0.3 | f | f | f |
| X70 | 0.26e | 1.65 e | 0.3 | 0.3 | f | f | f |
| a. Cu ≤ = 0.50% Ni; ≤ 0.50%; Cr ≤ 0.50%; and Mo ≤ 0.15%, b. For each reduction of 0.01% below the specified maximum concentration for carbon, an increase of 0.05% above the specified maximum concentration for Mn is permissible, up to a maximum of 1.65% for grades ≥ L245 or B, but ≤ L360 or X52; up to a maximum of 1.75% for grades > L360 or X52, but < L485 or X70; and up to a maximum of 2.00% for grade L485 or X70., c. Unless otherwise agreed NB + V ≤ 0.06%, d. Nb + V + TI ≤ 0.15%, e. Unless otherwise agreed., f. Unless otherwise agreed, NB + V = Ti ≤ 0.15%, g. No deliberate addition of B is permitted and the residual B ≤ 0.001% |
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JIS G3444 STK290,STK400,STK500,STK490,STK540 structural steel pipe
Quick Detail:
Standards: JIS G3444
Grade: STK290, STK400, STK500, STK490, STK540 ; STK30, STK41,STK,50,STK 51,STK55
Outer Dimensions: 6mm ~ 350mm
Wall Thickness: 0.8mm ~ 35mm
Length: max 24000mm
JIS G3444 STK290, STK400, STK500, STK490, STK540 pipe Description:
Standards: JIS G3444
Grade: STK290, STK400, STK500, STK490, STK540
Size (mm):
Outer Dimensions: 6mm ~ 350mm
Wall Thickness: 0.8mm ~ 35 mm
Length: max 24000mm
Application: Tubes used for machinery, automobiles, bicycles, furniture, appliances and other machine parts.
Packing: Beveled/black painting/ plastic caps/ in bundles/ steel strips/ wooden protection
Inspection and Test: Chemical Composition Inspection, Mechanical Properties Test(Tensile Strength, Yield Strength,Elongation, Flaring, Flattening, Bending, Hardness, Impact Test),Surface and Dimension Test,Nodestructive Test, Hydrostatic Test.
Surface treatment:Oil-dip, Varnish, Passivation, Phosphating, Shot Blasting
Mark: As requested.
Delivery Condition:Annealed, Normalized, Normalized and Tempered
JIS G3444 Chemical composition,%:
|
Steel grade |
Chemical composition,% |
||||
|
C |
Si |
Mn |
P |
S |
|
|
STK290 |
- |
- |
- |
≤0.050 |
≤0.050 |
|
STK400 |
≤0.025 |
- |
- |
≤0.040 |
≤0.040 |
|
STK500 |
≤0.24 |
≤0.35 |
0.30-1.30 |
≤0.040 |
≤0.040 |
|
STK490 |
≤0.18 |
≤0.55 |
≤1.50 |
≤0.040 |
≤0.040 |
|
STK540 |
≤0.23 |
≤0.55 |
≤1.5 |
≤0.040 |
≤0.040 |
JIS G3444 Mechanical Properties:
|
Mechanical properties |
Tensile strength, N/mm2 |
Yield strength, N/mm2 |
Elongation,% |
Bending property |
Weld tensile strength,N/mm2
|
||
|
Longitudinal |
Transverse |
Angel of bending |
ID |
||||
|
OD |
All |
All |
≥40mm |
≤50mm |
≥350mm |
||
|
STK290 |
≥290 |
- |
≥35 |
≥25 |
90o |
6D |
≥290 |
|
STK400 |
≥400 |
≥235 |
≥23 |
≥18 |
90o |
6D |
≥400 |
|
STK500 |
≥500 |
≥355 |
≥15 |
≥10 |
90o |
6D |
≥500 |
|
STK490 |
≥490 |
≥315 |
≥23 |
≥18 |
90o |
6D |
≥490 |
|
STK540 |
≥540 |
≥390 |
≥20 |
≥16 |
90o |
6D |
≥540 |
