Product

Standard

Steel Grade

Size（mm）

Welded steel pipes for low pressure liquid delivery

GB/T3091

Q215～Q235、Q295～Q345

φ21-φ89×2.8-5.0

Cold forming sectional steel for passenger vehicle

GB/T6725

GB/T6727

20、 Q195-235、Q345GNHL

Square, rectangle

Cold forming hollow  sectional steel for structure

GB/T6725

GB/T6728

Q195～Q235

Square, rectangle

Welded steel tubes for supporting roller of belt conveyor

GB/T13792

Q215、Q235、20

Φ63.5-108×3.2-4.5

Precision welded tubes for automobiles and sports equipment

GB/T13793

Q195～Q235、HG16、08F

Q345-Q460、Q345GNHL

Q195-235、Q345GNHL

φ16-φ114×0.8-5.0

Φ32-89×2.0-5.0

Φ40×1.5、Φ57×2.0

Low alloy high strength welded tubes for scaffold and space frame

Welded tubes for pre-heater

Welded steel tubes for mine liquid service

GB/T14291

Q235

φ21.3-89×2.5-4.5

Welded steel tubes for water pump of deep well

YB/T4028

Q195～Q235

φ48-89×3.0～4.5

Welded steel tubes for low and medium pressure boiler

YB4102

10、20

Φ19-114×1.5-4.5

Welded steel tubes for heat-exchanger

YB4103

10

Φ19-57×2.0-4.0

Welded high strength atmospheric corrosion resisting steel tubes for structure

YB/T4112

Q300-355GNH

Φ21-89×2.0-5.0

Welded steel tubes for drive shaft

YB/T5209

08Z、20Z

Φ50-89×2.5-5.0

Welded low alloy high strength steel tubes for scaffolding

Q/HG301

HG16(STK490)

φ21.7-89×2.0-4.0