What is spiral submerged arc welded pipe

Spiral submerged arc welded pipe standard
Submerged arc welded pipe

GB/T
9711.1

SY/T
5037, 5040

API
5L

ISO
2604/VI

TOCT
20295

ASTM
A134, A139, A211, A252, A381

JIS
G3444, G3457

DIN
EN10208-2

Note: According to user requirements, the production of steel pipes can also be organized in accordance with the requirements of the American Petroleum Institute’s “Recommended Wide Practical Code for the Design, Construction, Operation and Maintenance of Offshore Hydrocarbon Pipelines” and the Det Norske Veritas “Submarine Piping System Code” and other standards.
Our company has the GB9711-88 standard oil and natural gas production license issued by the state. In the first half of 1996, it passed the ISO9002 product quality certification and ISO9002 quality system certification by the National Bureau of Technical Supervision. Recently, our company obtained it again in March 1998. The API international product quality certification was awarded.

project
Line pipe

API 5L
GB/T9711.1-1997

Outer diameter deviation of pipe end
+2.38mm-0.79mm
+2.38mm-0.79mm

Wall thickness deviation
D<475.2mm+15.0%t,-12.5%td>508mm+19.5%t,-8.0%t
D<475.2mm+15.0%t,-12.5%td>508mm+19.5%t,-8.0%t

Straightness
<0.2%L
<0.2%L

Ellipse degree
D>508mm±1.0%D
D>508mm±1.0%D

Tube end state
Chamfer 30º to 35º Blunt edge 1.59±0.79mm Cut oblique <1.59mm
Chamfer 30º to 35º Blunt edge 1.59±0.79mm Cut oblique <1.59mm

Weight deviation
Single root +10.0%, -3.5% Loading batch -1.75%
Single root +10.0%, -3.5% Loading batch -1.75%

Non-destructive inspection
100% X-ray or 100% ultrasonic plus tube end X-ray inspection
100% X-ray or 100% ultrasonic plus tube end X-ray inspection

hydrostatictest
P=2St/DD<508mm,s=0.85r t0.5d=””>508mm,S=0.90R t0.5
P=2St/DD<508mm,s=0.85r t0.5d=””>508mm,S=0.90R t0.5

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