Seamless steel pipe is a long strip of steel with a hollow section and no joints. Rolling methods include hot rolling, hot extrusion, and cold drawing (rolling) of SMLS steel pipe. The material includes carbon steel bars and stainless steel bars.
Seamless steel pipe has better pressure capacity, strength is higher than ERW welded steel pipe.
| Process Technique | Electric Resistance Welded, Welded |
|---|---|
| Size | 1/2" – 26", 21.3MM-660MM, DN 15- DN 650 |
| Thickness | 1mm – 20mm |
| Length | 11.8m, 12m, 5.8m, 6m, others |
| Standard | API, ASTM |
| Grade | A523, API 5L, ASTM A53 |
Seamless steel pipe is perforated by the whole round steel, and the steel pipe without a weld on the surface is called seamless steel pipe.
According to the production method, seamless steel pipe can be divided into hot-rolled seamless steel pipe, cold-rolled seamless steel pipe, cold-drawn seamless steel pipe, extruded seamless steel pipe, pipe jacking, etc. According to the section shape, seamless steel pipes are divided into circular and special-shaped pipes.
Maximum diameter: 36″ (914.4mm) minimum diameter: 1/2″ (21.3mm)
Maximum thickness: 60mm mininmum thickness: 2.11mm
SCH: SCH10,SCH20,STD,SCH40,SCH60,XS,SCH80,SCH100,SCH120,SCH160
The production process of seamless steel pipe can be divided into cold drawing and hot rolling.
1. The production process of cold-rolled seamless steel pipe is generally more complex than hot rolling. The appearance of cold-rolled seamless steel pipe is shorter than that of hot-rolled seamless steel pipe. The wall thickness of cold-rolled seamless steel pipe is generally smaller than that of hot-rolled seamless steel pipe, but the surface looks brighter than that of thick-walled seamless steel pipe. The surface is not too rough, and the diameter does not have too many burrs.
2. The delivery status of hot-rolled seamless steel pipe is generally hot-rolled and delivered after heat treatment.
| Surface | Ends | Coating |
| Black Seamless Pipe Gi Seamless Pipe | Black ends Bevelled ends Plain ends | 3PE Coating,3PP Coating, FBE Coating, Epoxy Coating, Special Painting |
High-pressure boiler, oil and gas pipeline, ship, liquid transportation, mechanical engineering and structure, low and medium-pressure boiler, low temperature pipeline, etc.
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