LSAW Pipes: Longitudinally Submerged Arc Welding Pipe

LSAW Pipes: Longitudinally Submerged Arc Welding Pipe

What is LSAW pipes(Longitudinally Submerged Arc Welding Pipes)? The raw material of single steel plates put into the mould to press into a tube blank, and then the tube blanks are produced by dou

What is LSAW pipes(Longitudinally Submerged Arc Welding Pipes)? 

The raw material of single steel plates put into the mould to press into a tube blank, and then the tube blanks are produced by double-sided submerged arc welding and expanding diameter. The finished LSAW tubes have a wide range of specifications, good toughness of the weld seams, good plasticity, fine uniformity and better compactness, while the LSAW has the advantages of large pipe diameter, thick pipe wall, high pressure resistance, low temperature resistance and corrosion resistance. 

Application of LSAW pipes

LSAW pipes play a major role in oil and gas pipelines with features of high strength, high quality and long distance. According to the standard of American Petroleum Institute (API), the LSAW pipes are the only designated pipes in large scaled oil and gas transportation, especially when the pipelines cross the densely populated urban areas and the first and second class cities.

There are three making process for welded pipes: 

UOE welded tubes: after pre-rolling of the single steel plate, and then it is formed from U to O forming, then internal welding, outside welding, the mechanical cold expansion and other processes. 

JCOE welded pipes:  the pipes made according to “J-C-O-E” pre-welding, forming, cold expansion and other processes;

HME welded pipes: formed by the "C-C-O" mandrel rolling method, and the process of cold expansion after welding.


Below are some main grades Shanghai All-Win Iron & Steel usually offer:

GB/T9711-2011 PSL1
GB/T9711-2011      PSL1 L485GB/T9711-2011    PSL1 L450GB/T9711-2011      PSL1 L415GB/T9711-2011      PSL1 L390 GB/T9711-2011 PSL1 L360
GB/T9711-2011   PSL1 L320GB/T9711-2011      PSL1 L290GB/T9711-2011    PSL1 L245 GB/T9711-2011      PSL1 L210GB/T9711-2011 PSL1 L175P 
GB/T9711-2011  PSL1 L175



GB/T9711-2011 PSL2

GB/T9711-2011      

PSL2 L555 

GB/T9711-2011 PSL2 L485GB/T9711-2011      PSL2 L450

GB/T9711-2011    

PSL2 L415

GB/T9711-2011 PSL2 L390

GB/T9711-2011     

PSL2 L360

GB/T9711-2011 PSL2 L320 

GB/T9711-2011  

PSL2 L290

GB/T9711-2011  

PSL2 L245


API 5L PSL1

API 5L PSL1          

API 5L X70

API 5L PSL1      

API 5L X65

API 5L PSL1      

API 5L X60

API 5L PSL1        

API 5L X56

API 5L PSL1     

API 5L X52

API 5L PSL1      

API 5L X46

API 5L PSL1            API 5L X42API 5L PSL1           API 5L Grade BAPI 5L PSL1 API 5L Grade A

API 5L PSL1    

API 5LA 25P

API 5L PSL1            API 5L A25



API 5L PSL2
API 5L PSL2           API 5L X80API 5L PSL2            API 5L X70     

API 5L PSL2           

API 5L X65

API 5L PSL2            API 5L X60API 5L PSL2         API 5L X56 

API 5L PSL2      

API 5L X52

API 5L PSL2        API 5L X46API 5L PSL2        API 5L X42

API 5L PSL2            

API 5L Grade B


API 2B
API 2B 2WAPI 2B 2H
ASTM A36
ASTM A36 ASTM A36 
ASTM A283
ASTM A283 A283GR.C
ASTM A572
ASTM A572 A572GR.50ASTM A572 A572GR.42
DIN 17100
DIN 17100 St52-3DIN 17100 St44-2 DIN 17100 St37-2
JIS G3101
JIS G3106 SM570JIS G3101 SS540JIS G3101 SS490JIS G3101 SS400
JIS G3106

JIS G3106 

SM570

JIS G3106

SM520B

JIS G3106 SM490YBJIS G3106 SM490YAJIS G3106 SM490C

JIS G3106 

SM490B

JIS G3106

SM400C 

JIS G3106 SM400BJIS G3106 SM520CJIS G3106 SM490A
JIS G3106 SM400A



ASTM A671

ASTM A671 

CC70

ASTM A671

CC60

ASTM A671 CB70ASTM A671 CB65

ASTM A671

CB60

ASTM A671 

CA55





ASTM A252

ASTM A252             

A252 Grade C 

ASTM A252              A252 Grade BASTM A252              A252 Grade A
EN10025-6
EN10025-6 S960QL1 

EN10025-6

 S960QL

EN10025-6 S960QEN10025-6 S890QL1EN10025-6 S890QL

EN10025-6 

S890Q

EN10025-6 S690QL1EN10025-6 S690QLEN10025-6 S690Q EN10025-6 S620QL1

EN10025-6 

S620QL

EN10025-6 

S620Q

EN10025-6 S550QL1EN10025-6 S550QLEN10025-6 S550Q
EN10025-6 S500QL1

EN10025-6

 S500QL

EN10025-6 S460QL1EN10025-6 S500QEN10025-6 S460QL
EN10025-6 S460Q



EN10025-2

EN10025-2 

S420J0

EN10025-2

 S355K2

EN10025-2 S355J2EN10025-2 S355J0EN10025-2 S355JR

EN10025-2 

S275J2

EN10025-2 

S275J0 

EN10025-2 S275JR EN10025-2 S235J2EN10025-2 S235J0

EN10025-2 

S235JR 





EN10219

EN10219 

S460MLH 

EN10219 

S460MH 

EN10219 S420MLHEN10219 S420MHEN10219 S355MLH

EN10219 

S355MH

EN10219 

S275MLH

EN10219 S275MH EN10219 S460NLH

EN10219

 S460NH

EN10219 

S355NLH

EN10219 

S355NH

EN10219 S275NLHEN10219 S275NH EN10219 S355K2H

EN10219 

S355J2H

EN10219 

S355J0H

EN10219 S275J2HEN10219 S275J0HEN10219 S235JRH
GB/T1591

GB/T1591 

Q460E

GB/T1591

 Q460D

GB/T1591 Q460C

GB/T1591

 Q420E

GB/T1591 

Q420D

GB/T1591 

Q420C 

GB/T1591 

Q420B

GB/T1591 Q420A 

GB/T1591

 Q390E

GB/T1591 

Q390D

GB/T1591 

Q390C

GB/T1591 

Q390B

GB/T1591 Q390A

GB/T1591

 Q345E

GB/T1591 

Q345D

GB/T1591 

Q345C

GB/T1591 

Q345B 

GB/T1591 Q345A

Ship Class
EH32FH40EH40DH40AH40 
FH36 EH36DH36AH36FH32 
DH32AH32Grade EGrade D Grade B
Grade A



GBT 700
GBT700 Q275GBT700 Q235DGBT700 Q235CGBT700 Q235B GBT700 Q235A


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