- Jun 30, 2017 -
Pipe is one of the important products of oil and natural gas pipeline construction, the quality of steel pipe is directly related to the pipeline installation, pipeline operation safety and pipeline service life. According to the production methods, steel pipes can be divided into seamless pipe, the submerged arc welding pipe, electric resistance welding pipe, spiral steel pipe etc. Materials include: L245（B）, L290（X42）,L320（X46）, L360（X52）, L390（X56）, L415（X60）, L450 （X65）, L485（X70）, L555（X80）, L625（X90）, L690（X100）, L830（X120）etc. Standards includes: API SPEC 5L、GB9711.
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