Thin-walled tubes are made by perforating steel ingots or solid tubes into rough tubes, and then hot-rolled, cold-rolled or cold-drawn. Thin-walled tubes play an important role in my country's steel pipe industry. The raw material of thin-walled tubes is round tube billets, which are cut by a cutting machine into billets with a length of about 1 meter and sent to the furnace for heating via a conveyor belt.
Products: seamless stainless steel tubes (including round tubes, square tubes, rectangular tubes, thick-walled tubes, special-shaped tubes, etc.).
Material: 06Cr19Ni10 (S30408), 022Cr19Ni10 (S30403), 06Cr18Ni11Ti (S32168), 07Cr18Ni11Ti (S32169), 06Cr17Ni12Mo2 (S31608), 022Cr17Ni12Mo2 (S31603), 0Cr25Ni20 (S31008)
Production group spacing: outer diameter Φ6~426mm, wall thickness: 1~25mm.
Production standards: GB/T14976-2012, GB/T14975-2012, GB13296-2013, ASTM A312, ASTM A213, etc.
Normal single length: Unfixed length is 4 meters to 8 meters, fixed length is the customer-specified length with an upper limit of 9 meters.
Delivery status: pickling and solid solution treatment.
Application characteristics: fluid transportation/mechanical equipment/engineering installation, etc.
Application areas: petrochemical, fertilizer, electricity, boiler heat exchanger, ship, environmental protection, mechanical processing, papermaking, food and beverage, etc.
· Wall thickness calculation formula:
Design pressure (P): MPa
Outer diameter (D): mm
Material allowable stress (S): 137MPa for 304 stainless steel
Weld coefficient (E): 1.0 for seamless pipe
· Material identification comparison:
Drinking water/chemicals: select 316L material (chloride ion corrosion resistance)
Ordinary cold water: 304 material is sufficient
· Selection Guide:
Determine the medium type: 316L material for drinking water/chemicals, 304 material for ordinary cold water
Calculate flow requirements: DN15-DN25 for home use, DN32-DN300 for engineering use
Pressure level selection: 1.6MPa for conventional water supply, ≥2.5MPa for high-rise buildings
Connection mode adaptation: Press-type connection for exposed pipes, welding connection for concealed projects
Surface treatment requirements: Electrolytic polishing of the inner wall (Ra≤0.4μm) is food grade, and ordinary pickling and passivation is industrial grade
| Nominal diameter | 1 series outer diameter | 2 series outer diameter | Wall thickness (unit: mm) | European Standard | |||
| Thin | National Standard | Thickening | Outer diameter | Wall thickness | |||
| DN15 | 16 | 16 | 0.6 | 0.8 | 1.0 | 18 | 1.5 |
| DN20 | 20 | 22.2 | 0.8 | 1.0 | 1.2 | 22 | 1.5 |
| DN25 | 25.4 | 28.6 | 0.8 | 1.0 | 1.2 | 28 | 1.5 |
| DN32 | 32 | 34 | 1.0 | 1.2 | 1.5 | 35 | 1.5 |
| DN40 | 40 | 42.7 | 1.0 | 1.2 | 1.5 | 42 | 1.5 |
| DN50 | 50.8 | 48.6 | 1.0 | 1.2 | 1.5 | 54 | 1.5 |
| DN60 | 63.5 | 63.5 | 1.5 | 1.5 | 2.0 | / | / |
| DN65 | 76.1 | 76.1 | 1.5 | 2.0 | / | / | / |
| DN80 | 88.9 | 88.9 | 1.5 | 2.0 | / | / | / |
| DN100 | 101.6 | 108 | 1.5 | 2.0 | / | / | / |
| DN125 | 133 | 133 | 2.0 | 2.5 | / | / | / |
| DN150 | 159 | 159 | / | 2.5 | 3.0 | / | / |
| DN200 | 219 | 219 | / | 3.0 | 4.0 | / | / |
| DN250 | 273 | 273 | / | 3.0 | / | / | / |
| DN300 | 325 | 325 | / | 4.0 | / | / | / |
contact
Be the first to know about our new product launches, latest blog posts and more. Jiangsu Changtai Stainless Steel Pipe Industry Co., Ltd. is located in Chengnan Park, Economic Development Zone, Jingjiang City, Jiangsu Province. The company is close to the Beijing-Shanghai Expressw... Any question or request?
Click below, we’ll be happy to assist. contact
