erw line pipe,ssaw pipeline

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