Specifications: diameter: 320 to 127 mm thickness: 0.4 to 12.7 mm Length: 6 m above, and, in accordance with customer demand, supply and other specifications of steel pipe

erw line pipe,ssaw pipeline


 

ERW Pipe

erw pipe line

Gas,Oil,Water transport,Pile and Construction and etc.

Outside Diameter ¢76mm-¢508mm

Wall Thickness 3.2mm-20mm

Grade X42-X70 J55、K55、H40

Standard API 5CT API 5L-PSL1 API 5L-PSL2 ASTM A53

QUALITY INDEX FOR LINE PIPE

 

SSAW Pipe

Gas,Oil,Water transport,Pile and Construction and etc.

ssaw pipe

Outside Diameter ¢219mm-¢2250mm

Wall Thickness 5mm-20mm

Grade X42-X70

Standard API 5L-PSL1 API 5L-PSL2

Item

GB/T9711.1—1997

SSAW Pipe ERW Pipe

GB/T9711.2—1999

SSAW Pipe ERW Pipe

API 5L

SSAW Pipe ERW Pipe

SY/T5037-2000

SSAW Pipe

 

 

Dia.of ends variation

OD≤273.1mm

+1.59mm -0.04mm

323.9mm≤OD≤508mm

+2.38 -0.79mm

OD>508mm

+2.38mm -0.79mm

OD≤610mm

±0.5mm或±0.5% OD

610mm<OD≤1430mm

±1.6 mm

OD>1430mm

+2.38mm

-0.79mm

OD<508mm

±0.75% OD

OD≥508mm

±1.00% OD

 

 

Thickness

variation

 

OD<508mm

+15.0%t, -12.5%t

OD≥508mm

+17.5%t, -10.0%t

(L175、L210、L245)

+19.5%t, -8.0%t

(L290-L555)

T≤10mm, +1.0mm

-0.5mm

 

10mm<T<20mm+10%

-5%

T≥20mm, +2.0mm

-1.0mm

OD<457mm

+15.0%t

-12.5%t

OD≥508mm

+19.5%t

-8.0%t

OD<508mm

±12.5%t

OD≥508mm

±10.0%t

 

Ellipticity

variation

 

OD≥508mm, ±1.00% OD

 

60mm<OD≤610mm,1.5% OD

 

OD≥508mm

±1.00%D

±1.00%OD

 

Straight-ness

 

≤0.2%L

≤0.2%L

<0.2%L

≤0.2%L

 

 

Ends

 

 

 

 

Weight

Variation

 

ends beveled

30° -35°

root face

1.59±0.79mm

cut square1.59mm

 

unit+10%,-3.5%

partial delivered -1.75%

Based on the theoretical

weight

ends beveled

30° -35°

root face

1.6±0.8mm cut square≤1.6mm

 

 

 

unit+10%,-3.5%

ends beveled

30° -35°

root face

1.59±0.79mm

cut square1.59mm

 

 

unit+10%,-3.5%

partial delivered-1.75%

ends beveled

30° -35°

root face

1.6±0.8mm

cut square D<813mm,<1.5m

D≥813m,<3.0mm

Based on the theoretical

weight or as discuss between buyer and seller

 

 

 

Non-destr-uctive test

 

 

 

100%X-ray inspection or

100% ultrasonic and X-ray inspection for ends

 

 

 

100%X-ray inspection or 100% ultrasonic and X-ray inspection for ends

 

 

100%X-ray inspection or 100% ultrasonic and X-ray inspection for ends

The patching welded joint, the butt-welded seam and the link to the welded joint, should make the X-ray or the ultrasonic testing.

 

 

 

Hydrostat-ic tests

 

P=2st/D

L210、L245、S=0.6σ0.5

L290-L555

D=219。1MM,s=0.75σ0.5

D=273.1mm -457mm,

s=0.85σ0.5

D≥508mm,S=0.9σ0.5

Steady time for pressure≥10S

P=2st/D

S=95%σ0.5

D=≤406.4mm

P≤50Mpa

D>406.4mm

P≤25Mpa

Steady time for pressure≥10S

 

P=2st/D

D<508mm

S=0.85σ0.5

D≥508mm

S=0.9σ0.5

Steady time for pressure≥10S

 

 

P=2st/D

S=60%σ0.5

D≤508mm

Steady time for pressure≥5S

D≥508mm

Steady time for pressure≥10S

 

 

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