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API 5L X70M High Frequency Welded Pipe For Gas Transmission High frequency welding (HFW) steel pipe is that ERW pipe produced with a welding current frequency equal to or greater than 70 kHZ. Through high-frequency current welding resistance, the heat generated in the contact objects, so the objected surface are heated to the plastic state, then with or without forging to achieve a combination Analysis of Corrosion-induced Invalidation of L320 [1]. Third, the natural gas, water and soil in the steel pipe line contain corrosive gases, bacteria and other internal corrosion. According to the above reasons, the failure analysis of a long-distance natural gas pipeline with leakage occurred. The length of the long-distance natural gas pipeline in the failed section is about 212.6 km.

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GB T 9711 L360 PSL1 steel pipe mild steel plate price list As a GB T 9711 L360 PSL1 steel pipe mill/factory in China,we can offer GB T 9711 L360 PSL1 steel pipe steel geade stock,hot sell 09CuPCrNi A,Corten A,A283C,A36 steel grade,Q345B grade,S355JR stock,S355J2 steel plate,Q345D,steel plate stock in China.[price]3lpe External Coating Steel GB T 9711 L210 steel grade-Truhlarstvi Hubeny Steel GB/T 9711.1 HSAW Steel Pipe Categories:spiral steel pipe Materials:The GB/T 9711.1 HSAW steel pipe is made of L175,L210,L245,L290,L320,L360,L390,L415,L450,L485 and L555 steel types.Technical specifications:The maximum outer diameter of the GB/T 9711.1 HSAW steel pipe product is. GB/T 9711-2011 English Version,GB/T 9711-2011 Petroleum GB/T 9711-2011 English Version - GB/T 9711-2011 Petroleum and natural gas industriesSteel pipe for pipeline transportation systems (English Version) GB/T 9711