seamless pipe

• GB 5310-2008
• GB/T8162-2008
• GB/T8163-2008
• GB3087-2008
• GB9948-2013
• GB6479-2013

welded pipe/Galvanized Welded Pipe

• GB/T3091-2008
• GB/T13793-2008

Rectangular/Square Tube / Galvanized Rectangular/Square Tube

• GB/T6728-2017

Spiral Pipe

• SYT5037-2012

I-Beam

• GB/T706-2008

Channel Steel

• GB/T706-2008

Angle Steel / Galvanized Angle Steel

• GB/T706-2008

H-Beam

• GB/T11263-2010

Coil Plate / Steel Coil

• GB/T3274-2007

Medium Plate

• GB/T1591-2008

Patterned Coil / Checkered Plate

• GB/T3277-1991