There are many kinds of hot-rolled seamless pipes, each of which has different applications. Therefore, each of them has different specifications and follows different executive standards. The following are the classifications, executive standards and specifications of the ten most commonly used steel pipes.
Classifications of hot rolled seamless pipes
Hot rolled seamless pipes
The hot rolled seamless steel pipe is divided into general steel pipes, low and medium pressure boiler steel pipes, high pressure boiler steel pipes, alloy steel pipes, stainless steel pipes, petroleum cracking pipes, geological steel pipes and other steel pipes.
Cold rolled seamless steel pipes
In addition to general steel pipes, low and medium pressure boiler steel pipes, high pressure boiler steel pipes, alloy steel pipes, stainless steel pipes, petroleum cracking pipes and other steel pipes, it also includes carbon thin-walled steel pipes, alloy thin-walled steel pipes, stainless thin-walled steel pipes and special-shaped steel pipes. The outer diameter of hot-rolled seamless pipes is generally greater than 32mm, and the wall thickness is 2.5-75mm. The outer diameter of cold-rolled seamless pipes can reach 6mm, and the wall thickness can reach 0.25mm. The outer diameter of thin-walled pipes can reach 5mm, and the wall thickness is less than 0.25mm.
Executive standards and specifications of hot rolled seamless pipes
1. Alloy steel pipes
Executive standards: GB5310-2008, GB6479-2000, GB9948-2006, DIN17175-79, ASME SA335, ASME SA213, JISG3467-88, JISG3458-88
Specifications: ∮ 8-1240 * 1-200
2. Stainless steel pipes
Executive standards: GB/T14975-2002, GB/T14976-2002, GB13296-2007, ASTM A213, ASTM A269, ASTM A312, JISG3459, DIN17458
Specifications: ∮6-630*0.5-60
3. Low temperature pipes
Executive standards: GB/T18984-2003, ASTM A333
Specifications: ∮8-1240*1-200
4. High pressure boiler tubes
Executive standards: GB5310-1995, ASME SA106, ASME SA210, DIN17175-79, GB6479-2000
Specifications: ∮8-1240*1-200
5. Petroleum cracking pipes
Executive standards: GB9948-2013
Specification: ∮8-630*1-60
6. Low and medium pressure boiler tubes
Executive standards: GB3087-2008
Specifications: ∮8-1240*1-200
7. Fluid delivery pipes
Executive standards: GB/T8163-2008, ASTM A106, ASTM A53
Specifications: ∮8-1240*1-200
8. General structure pipes
Executive standards: GB/T8162-2008, GB/T17396-1998, ASTM A53
Specifications: ∮8-1240*1-200
9. Oil casing
Executive standards: API SPEC 5CT, ISO 11960
Specifications: ∮∮60.23-508.00*4.24-16.13
10. Straight seam steel pipes
Executive standards: GB/T13793-1992, GB3091-2001
Specifications: ∮32-630*1-30
Nov 30, 21
