Hebei Baolong Steel Pipe

Manufacturing Co., Ltd.

Production method: spiral steel pipe is made of hot rolled steel strip/plate as raw material, after extrusion in room temperature, then welded by automatic double-sided submerged arc welding process.

Standard：SY/T5040-2012《Welded Steel Tubes For Piles》

SY/T5037-2018《Submerged Arc Welded Steel Pipe For General Fluid Transfer Pipeline》

GB/T3091-2015《Welded Steel Tubes For Low Pressure Fluid Transfer》

GB/T9711-2017《Steel Pipes For Petroleum And Natural Gas Pipeline Transportation Systems》

Materials：Q235A-D、20#、Q355B-D、Q390B-D、Q420B-D、Q460B-D

L245(B)、L290（X42）、L320（X46）、L360（X52）、L390(X56)、L415(X60)、L450(X65)、L485(X70)、L555(X80)

L290NB/MB（X42N/M）、L360NB/MB（X52N/M）、L390NB/MB(X56N/M)、L415NB/MB(X60N/M)、L450MB(X65)、L485MB(X70)、L555MB(X80)。

Application: spiral steel pipe is mainly used in water engineering, petrochemical industry, chemical industry, electric power industry, agricultural irrigation, urban construction. It is one of the 20 key products developed by China.

For liquid conveying: water supply, drainage, sea water transport, oil transport.

For gas conveying: gas, steam, liquefied petroleum gas, natural gas.

For structural use: pile pipe, bridge, wharf, road, building structure pipe, etc.