Factory wholesale Seamless Steel Pipe Hot Sale High Quality Carbon Steel Seamless Pipe
We often stay with the principle “Quality Very first, Prestige Supreme”. We have been fully committed to supplying our consumers with competitively priced high-quality goods, prompt delivery and skilled provider for Factory wholesale Seamless Steel Pipe Hot Sale High Quality Carbon Steel Seamless Pipe, “Passion, Honesty, Sound support, Keen cooperation and Development” are our plans. We’ve been here anticipating good friends all around the globe!
We often stay with the principle “Quality Very first, Prestige Supreme”. We have been fully committed to supplying our consumers with competitively priced high-quality goods, prompt delivery and skilled provider for China Carbon Steel Seamless Pipe and Seamless Steel Tube, We have been in operation for more than 10 years. We have been dedicated to quality products and solutions and consumer support. We currently own 27 product utility and design patents. We invite you to visit our company for a personalized tour and advanced business guidance.
Low and medium pressure boiler tubes are made of ingots or solid billets that are perforated to form a burr tube, and then hot rolled, cold rolled or cold dialed. Seamless steel pipe has an important position in China’s steel pipe industry. According to incomplete statistics, China’s existing seamless pipe production enterprises about 240 more than, seamless steel pipe unit about 250 sets, the annual production capacity of about more than 4.5 million tons. From the caliber point of view, <φ76, accounting for 35%, <φ159-650, accounting for 25%. In terms of varieties, 1.9 million tons of general-purpose tubes, accounting for 54%; 760,000 tons of petroleum tubes, accounting for 5.7%; 150,000 tons of hydraulic pillars, precision tubes, accounting for 4.3%; stainless tubes, bearing tubes, automotive tubes a total of 50,000 tons, accounting for 1.4%.
Low and medium pressure boiler tube mechanical properties: tensile strength σb (MPa): ≥ 410 (42) yield strength σs (MPa): ≥ 245 (25) elongation δ5 (%): ≥ 25 section shrinkage ψ (%): ≥ 5, hardness: not heat treatment, ≤ 156HB, sample size: sample size 25mm heat treatment specifications and metallographic organization: heat treatment specifications: normalized, 910 ℃, Air cooling. Metallographic organization: ferrite + pearlite.
Medium and low pressure boiler tube execution standard: GB3087-1999 seamless steel tube for low and medium pressure boiler.
Medium and low pressure boiler tubes are hot rolled and cold drawn (rolled) seamless tubes of high quality carbon structural steel used for making superheated steam tubes, rolled water tubes and superheated steam tubes for locomotive boilers, large smoke tubes, small smoke tubes and arch brick tubes for various structures of low and medium pressure boilers. Mainly used for industrial boilers and living boilers to transport low and medium pressure fluid pipes. The representative material is 10 and 20 gauge steel.
| Standard | Brand | Tensile strength(MPa) | Yield point（MPa）≥ | Elongation（%） ≥ | Impact power(J)≥ |
| GB/T3087-2018 | 10# | 333-475 | 196 | 24 | - |
| 20# | 392-588 | 245/226 | 20 | - | |
| GB/T5310-2018 | 20G | 410-550 | 245 | 24 | 35 |
| 20MnG | ≥415 | 240 | 22 | 35 | |
| 25MnG | ≥485 | 275 | 20 | 35 | |
| 15MoG | 450-600 | 270 | 22 | 35 | |
| 20MoG | ≥415 | 220 | 22 | 35 | |
| 12CrMoG | 410-560 | 205 | 21 | 35 | |
| 15CrMoG | 440-640 | 235 | 21 | 35 | |
| 12Cr2MoG | 450-600 | 280 | 20 | 35 | |
| 12Cr1MoVG | 470-640 | 255 | 21 | 35 | |
| 12Cr2MoWVTib | 540-735 | 345 | 18 | 35 |
20g high pressure boiler tube specification table
| Specification | Specification | Specification | Specification |
| 18*4 | 42*8 | 89*9 | 159*10 |
| 18*5 | 45*3 | 89*10 | 159*12 |
| 19*2 | 45*4 | 89*11 | 159*14 |
| 21*4 | 45*5 | 89*12 | 159*16 |
| 22*2.5 | 45*6 | 108*4.5 | 159*18 |
| 22*3 | 45*7 | 108*5 | 159*20 |
| 22*4 | 48*4 | 108*6 | 159*28 |
| 22*5 | 48*4.5 | 108*7 | 168*6 |
| 25*2.5 | 48*5 | 108*8 | 168*7 |
| 25*3 | 48*6 | 108*9 | 168*8 |
| 25*4 | 48*7 | 108*10 | 168*9.5 |
| 25*5 | 48.3*12.5 | 108*12 | 168*10 |
| 25*5.5 | 51*3 | 108*14 | 168*11 |
| 27*3.5 | 51*3.5 | 108*15 | 168*12 |
| 27*4 | 51*4 | 108*16 | 168*14 |
| 27*5 | 51*5 | 108*20 | 168*15 |
| 27*5.5 | 51*6 | 114*5 | 168*16 |
| 28*2.5 | 57*4 | 114*6 | 168*18 |
| 28*3 | 57*5 | 114*7 | 168*20 |
| 28*3.5 | 57*5.5 | 114*8 | 168*22 |
| 28*4 | 57*6 | 114*8.5 | 168*25 |
| 30*2.5 | 60*4 | 114*9 | 168*28 |
| 32*2.5 | 60*4 | 114*10 | 180*10 |
| 32*3 | 60*5 | 114*11 | 194*10 |
| 32*3.5 | 60*6 | 114*12 | 194*12 |
| 32*4 | 60*7 | 114*13 | 194*14 |
| 32*4.5 | 60*8 | 114*14 | 194*16 |
| 32*5 | 60*9 | 114*16 | 194*18 |
| 34*3 | 60*10 | 114*18 | 194*20 |
| 34*4 | 76*4.5 | 133*5 | 194*26 |
| 34*4.5 | 76*5 | 133*6 | 219*6.5 |
| 34*5 | 76*6 | 133*7 | 219*7 |
| 34*6.5 | 76*7 | 133*8 | 219*8 |
| 38*3 | 76*8 | 133*10 | 219*9 |
| 38*3.5 | 76*9 | 133*12 | 219*10 |
| 38*4 | 76*10 | 133*13 | 219*12 |
| 38*4.5 | 89*4 | 133*14 | 219*13 |
| 38*5 | 89*4.5 | 133*16 | 219*14 |
| 219*16 | 273*36 | 356*28 | 426*12 |
| 219*18 | 273*40 | 356*36 | 426*13 |
| 219*20 | 273*42 | 377*9 | 426*14 |
| 219*22 | 273*45 | 377*10 | 426*17 |
1.Why you choose us ?
Our company has been in Alibaba.com for 12 years. We control the quality of the products very strictly, there are special people for the quality.
If you got lower price from other supplier ,we will pay back twice to customers about the higher price.
2.How long is your delivery time?
According to the quantity.Generally within 2-7 days if in stock.And 15-20 days if not in stock.
3.What is your payment terms?
A: By T/T 30% in advance ,and 70% before delivery.
B:100% L/C at sight.
C:By T/T 30% in advance,and 70% L/C at sight.
4.Do you provide samples ? Is it free?
Yes, we offer the sample for free but do not pay for the cost of freight.
5.What if the customer is not satisfied?
If there is a problem with the product,we take full responsibility.
If there is a problem in the transportation process,we will help you to solve it.
We often stay with the principle “Quality Very first, Prestige Supreme”. We have been fully committed to supplying our consumers with competitively priced high-quality goods, prompt delivery and skilled provider for Factory wholesale Seamless Steel Pipe Hot Sale High Quality Carbon Steel Seamless Pipe, “Passion, Honesty, Sound support, Keen cooperation and Development” are our plans. We’ve been here anticipating good friends all around the globe!
Factory wholesale China Carbon Steel Seamless Pipe and Seamless Steel Tube, We have been in operation for more than 10 years. We have been dedicated to quality products and solutions and consumer support. We currently own 27 product utility and design patents. We invite you to visit our company for a personalized tour and advanced business guidance.
