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Low and medium pressure boiler tubes
Low and medium pressure boiler tubes are made by piercing steel ingots or solid billets into tubes, which are then hot-rolled, cold-rolled, or cold dr
Product details
Low and medium pressure boiler tubes are made by piercing steel ingots or solid billets into rough tubes, which are then hot-rolled, cold-rolled, or cold drawn. Seamless steel pipes play an important role in China's steel pipe industry. According to incomplete statistics, China currently has seamless pipes
There are about 240 production enterprises, with over 250 sets of seamless steel pipe units and an annual production capacity of about 4.5 million tons. From the perspective of caliber, 35% of them are less than diameter 76, and 25% are less than diameter 159-650. From variety
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Look, the general purpose pipe is 1.9 million tons, accounting for 54%; 760000 tons of oil pipes, accounting for 5.7%; 150000 tons of hydraulic supports and precision pipes, accounting for 4.3%; Stainless steel pipes, bearing pipes, and automotive pipes total 50000 tons, accounting for1.4%. |
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| The raw material for rolling seamless pipes is round billet, which needs to be cut and processed by a cutting machine to a length of about 1 meter, and then sent to the furnace for heating by a conveyor belt. The steel billet is sent into the furnace for processing | Hot, with a temperature of approximately 1200 ℃. The fuel is hydrogen or acetylene. The temperature control inside the furnace is a critical issue After the round tube billet is taken out of the furnace, it needs to be perforated by a pressure perforating machine. The most common perforating machine is a conical roller perforating machine, | This perforating machine has high production efficiency, good product quality, large perforation and diameter expansion, and can pierce multiple types of steel. After perforation, the round billet is successively subjected to three roll oblique rolling, continuous rolling, or extrusion. After squeezing, the tube should be removed and the diameter adjusted. The sizing machine uses a conical drill bit to increase its height | Quickly rotate into the steel billet to drill holes and form steel pipes. The inner diameter of the steel pipe is determined by the outer diameter length of the drill bit of the sizing machine. After the steel pipe is calibrated, it enters the cooling tower and is cooled by spraying water. After cooling, the steel pipe needs to be straightened. Steel pipe straightened |
| Afterwards, it is transported by a conveyor belt to a metal flaw detector (or water pressure test) for internal flaw detection. If there are cracks, bubbles, or other issues inside the steel pipe, they will be detected. After the quality inspection of steel pipes, strict manual selection is also required. After quality inspection of steel pipes, use oil | Spray paint with identification number, specifications, production batch number, etc. And lifted into the warehouse by a crane. | Low and medium pressure boiler tubes in stock | （GB3087-2008） |
| specifications | specifications | specifications | specifications |
| 10*2 | 38*4.5 | 60*7 | 108*4 |
| 14*2 | 38*5 | 60*8 | 108*4.5 |
| 14*3 | 38*6 | 63.5*3 | 108*5 |
| 18*3 | 40*2 | 63.5*3.5 | 108*6 |
| 19*2 | 40*3.5 | 63.5*4 | 108*7 |
| 19*2.75 | 42*3 | 63.5*4.5 | 108*8 |
| 19*3 | 42*3.5 | 63.5*5 | 108*9 |
| 20*2 | 42*4 | 63.5*6 | 108*10 |
| 22*2 | 42*4.5 | 63.5*9 | 108*12.5 |
| 22*2.5 | 42*5 | 63.5*10 | 114*4 |
| 22*3 | 45*2.5 | 68*4 | 114*4.5 |
| 22*3.5 | 45*3 | 68*6 | 114*5 |
| 22*4 | 45*3.5 | 70*3 | 114*6 |
| 25*2 | 45*4 | 70*3.5 | 114*9 |
| 25*2.5 | 45*4.5 | 70*4 | 133*4.5 |
| 25*3 | 45*5 | 70*4.5 | 133*5 |
| 25*3.5 | 45*6 | 70*5 | 133*6 |
| 25*4 | 48*3 | 70*6 | 133*6.5 |
| 25.4*4.5 | 48*3.5 | 70*8 | 133*7 |
| 27*2.5 | 48*4 | 70*9 | 133*8 |
| 28*2.5 | 48*4.5 | 70*10 | 133*9 |
| 28*3 | 51*3 | 73*3.5 | 133*10 |
| 28*3.5 | 51*3.2 | 73*4 | 133*12.5 |
| 28*4 | 51*3.5 | 73*4.5 | 140*6 |
| 28*4.5 | 51*4 | 73*5 | 140*8 |
| 30*3 | 51*4.5 | 73*5.5 | 140*10 |
| 32*2 | 51*5 | 73*7 | 159*4.5 |
| 32*2.5 | 51*6 | 76*3.5 | 159*5 |
| 32*3 | 54*3.5 | 76*4 | 159*5.5 |
| 32*3.5 | 54.5*3.5 | 76*4.5 | 159*6 |
| 32*4 | 54*5 | 76*5 | 159*7 |
| 32*4.5 | 57*3 | 76*6 | 159*8 |
| 32*5 | 57*3.5 | 76*7 | 159*10 |
| 34*3 | 57*4 | 89*4 | 159*12 |
| 34*3.5 | 57*5 | 89*4.5 | 168*5 |
| 34*4 | 57*6 | 89*5 | 168*6 |
| 34*4.5 | 57*10 | 89*6 | 168*7 |
| 34*5 | 57*12 | 89*7 | 168*8 |
| 34*8 | 60*3 | 89*8 | 168*9 |
| 36*4 | 60*3.5 | 89*10 | 168*10 |
| 38*2.5 | 60*4 | 102*4 | 194*6 |
| 38*3 | 60*4.5 | 102*4.5 | 194*7 |
| 38*3.5 | 60*5 | 102*5 | 194*9 |
| 38*4 | 60*6 | 102*6 | 194*10 |
| specifications | specifications | specifications | specifications |
| 194*11 | 245*18 | 325*12 | 426*12 |
| 219*6 | 245*20 | 325*13 | 426*13 |
| 219*6.5 | 273*7 | 325*14 | 426*14 |
| 219*7 | 273*8 | 325*15 | 426*16 |
| 219*8 | 273*9 | 325*16 | 426*17 |
| 219*9 | 273*9.5 | 325*18 | 426*18 |
| 219*10 | 273*10 | 325*20 | 426*19 |
| 219*11 | 273*11 | 325*25 | 426*20 |
| 219*12 | 273*12 | 351*10 | 426*25 |
| 219*13 | 273*13 | 377*9 | 457*14 |
| 219*14 | 273*14 | 377*10 | 480*10 |
| 219*15 | 273*15 | 377*11 | 480*11 |
| 219*16 | 273*16 | 377*12 | 480*12 |
| 219*18 | 273*18 | 377*13 | 480*14 |
| 219*20 | 273*20 | 377*14 | 480*16 |
| 219*25 | 273*25 | 377*15 | 530*9 |
| 245*7 | 273*30 | 377*16 | 530*10 |
| 245*8 | 273*36 | 377*17 | 530*13 |
| 245*9 | 299*12 | 377*25 | |
| 530*14 | 245*10 | 325*8 | |
| 426*8 | 530*20 | 245*12 | |
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