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Related Products
| Product Category | Standard | Specification | Application |
| Alloy Steel Pipe/Tube |
GB5310-95 GB9948-88 ASTMA335/A335M ASTMA213/213M DIN17175-79 JISG3467-88 JISG3458-88 |
16-824*2-100 | Seamless steel tube used in petroleum chemical, electric power andhigh-pressure resistant, high temperature resistant, low temperature resistant and corrosion resisting of boiler industry |
| High Pressure Boiler Steel Pipe/Tube |
ASTMA106-99 GB5310-95 DIN17175-79 |
16-824*2-65 | Seamless steel tube of heatproof used in high pressure boiler. |
| Petroleum Cracking Steel Pipe/Tube | GB9948-88 | 10-530*1.5-3.6 | Seamless steel tube used for furnace and heat exchangers |
| Chemical Fertilizer Steel Pipe/Tube | GB6479-2000 | 25-426*6-40 | Seamless steel tube used in the chemical fertilizer equipment and pipeline |
| Medium & Low Pressure Boiler Pipe/Tube | GB3087-1999 | 10-530*2-40 | Seamless steel tube used for manufacturing, heating-pipeliners, containers,steaming pipelines of low/medium pressure boiler. |
| Liquid Steel Pipe/Tube | GB/T8163-1999 | 8-630*1.0-40 | Seamless steel tube used for the transportation of liquid |
| Structural Steel Pipe/Tube | GB/T8162-1999 | 6-610*1.5-40 | Seamless steel tube used for the general construction |
| Pipe Line | API | 60-630*1.5-40 | Seamless steel tube used for transportation of petroleum, |
| Hydraulic Prop Steel Pipe/Tube | GB/T17396-1998 | 70-377*9-40 | Seamless steel tube used in hydraulic prop and hydraulic support |
| Marine Steel Pipe/Tube | GB/T5312-1999 | 14-426*1.5-45 | Seamless steel tube used in pressure pipe, boiler and superheater of shipbuilding |
cold drawn seamless steel tubes:
Round tube → heating → perforation → Heading → annealing → pickling → Oiler (copper) → multi-pass cold drawn (cold) → Preform → heat treatment → straightening → hydrostatic test (testing) → marker → storage. The method of cold drawn (rolled) seamless steel pipe is more complex than hot-rolled (extrusion of seamless steel pipe). The first three steps of their production process is basically the same. The difference from the fourth step, the circular tube was empty to begin annealing. pickling need to use a special acidic liquid after annealing and oiling. Then followed by a blank tube, multi-pass cold drawn (cold) and then specialized heat treatment. it is necessary to straightening. it is sent by conveyor and straightening the metal detection machine (or hydrostatic test) to conduct an internal flaw. In the interior of the steel pipe,there is some issues such as cracks, bubbles will be detected. Steel pipe quality inspection is also through a rigorous manual selection.
Our Services:
Mechanical and structural tubes;High pressure boiler tubes and other alloy tubes;
Fluid transmission pipe and lower & Middle pressure boiler tubes;Tubes for ship;
Precision seamless tubes for Automobiles;High Precision pipes for hydraulic cylinder.
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