Seamless Steel Pipe
- The seamless steel pipe is made of perforated whole round steel, and the steel pipe without weld seam on the surface is called seamless steel pipe.
- According to the production method, seamless steel pipes can be divided into hot-rolled seamless steel pipes, cold-rolled seamless steel pipes, cold-drawn seamless steel pipes, extruded seamless steel pipes, and pipe jacking. According to the cross-sectional shape, the seamless steel pipe is divided into two types: round and special-shaped. The maximum diameter is 900mm and the minimum diameter is 4mm. According to different uses, there are thick-walled seamless steel pipes and thin-walled seamless steel pipes.
- Seamless steel pipes are mainly used as petroleum geological drilling pipes, cracking pipes for petrochemical industries, boiler pipes, bearing pipes and high-precision structural steel pipes for automobiles, tractors, and aviation.
Specifications
| Application | OIL PIPE, Low-pressure fluid transport, construction, fence posts, and conduit |
| Alloy Or Not | Non-Alloy |
| Section Shape | Round |
| Special Pipe | Thick Wall Pipe |
| Outer Diameter | 13.7 - 610 mm, DN8-DN600 |
| Thickness | 1.3 - 15 mm |
| Standard | API, ASTM, bs, DIN, GB, JIS, ASTM A53, ASTM A106, API 5L and so on, API 5L, ASTM A53-2007, BS 1387, BS EN10025, BS EN 39, BS EN10219, DIN EN 10217-1-2005, DIN 2444, DIN EN 10025, GB/T 9711.1-1997, GB/T 3091-2001, JIS G3444-2006 |
| Grade | 45#, Q235, Q345, Q195, ST37, ST52, ST42, 10#-45#, Q195-Q345, ST35-ST52 |
| Tolerance | ±10% |
| Processing Service | Punching, Cutting |
| Secondary Or Not | Non-secondary |
| Commodity | Black Carbon Steel Seamless Pipe for oil and gas |
| Wall Thickness | 1.3mm-30.0mm ( sch40/ sch80/ sch160) |
| Length | 6m/5.8m or customized |
| Material | Q195, Q235, Q345, #20 |
| pipe ends | bevel ends or plain ends with caps |
| Technique | Hot Rolled |
| Certification | API |
| Type | Seamless Steel Pipe |
The production process of seamless steel pipe
① The main production process of hot-rolled seamless steel pipe (main inspection process):
Tube blank preparation and inspection → tube blank heating → perforation → tube rolling → waste tube reheating → diameter determination (reduction) → heat treatment → finished tube straightening → finishing → inspection (non-destructive, physical and chemical, Taiwan inspection) → storage
② The main production process of cold-rolled (drawn) seamless steel pipe
Billet preparation → pickling lubrication → cold rolling (drawing) → heat treatment → straightening → finishing→inspection
