1.seamless pipe: size: φ10mm-φ630mm
material: 10# - 45# Q345 A, B, C, D 27SiMn 40Cr 40CrMn 20CrMn 30Mn
executive standard: GB8162 (structural pipe) GB8163 (fluid pipe) GB3087-99 (boiler pipe) GB5310-95 ( boiler pipe for high
pressure) GB6479-2000 (fertilizer special pipe) GB9948-88 (petroleum cracked pipe ) DIN17175-95 (German standard) ST45.8111
SA106B etc,foreign standard.
2.straight weld tubing,galvanized pipe;
size: φ10mm-φ630mm
material: Q195-Q235 16Mn Q345 A, B
3.welding square pipe/rectangular tube,galvanized square and rectangular pipe.
Size: φ12mm-φ400mm
material: Q195-Q235
4.screw seam two submerged-arc welding pipe
size: φ159mm-φ2200mm
material: Q235B Q345B
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