Standard for stainless steel tubes

1 structure with seamless pipe (GB/T8162-2008) is used for general structure and mechanical structure of seamless pipe.

2 seamless pipe for fluid transmission (GB/T8163-2008) is used for conveying water, oil, gas and other fluids of the general seamless pipe.

3. Seamless pipe for low and medium pressure boiler (GB3087-2008) is used for manufacturing all kinds of structure of low and medium pressure boiler superheated steam pipe, boiling water pipe and locomotive boiler superheated steam pipe, smoke pipe, small smoke pipe and arch brick pipe of high-quality carbon structural steel hot rolled and cold drawn (rolled) seamless pipe.

4 high pressure boiler seamless tube (GB5310-2008) is used for manufacturing high pressure and above the water tube boiler heating surface with high quality carbon steel, alloy steel and stainless heat resistant steel seamless tube.

5. High pressure seamless pipe for fertilizer equipment (GB6479-2000) is a high-quality carbon structural steel and alloy steel seamless pipe suitable for chemical equipment and pipelines with working temperature of -40~400℃ and working pressure of 10~30Ma.

6 Seamless pipe for petroleum cracking (GB9948-2006) is suitable for petroleum refinery furnace pipe, heat exchanger and pipeline seamless pipe.

7. Steel pipe for geological drilling (YB235-70) is a steel pipe for the geological department to use for core drilling, which can be divided into drill pipe, drill collar, core pipe, casing and settling pipe, etc.

8. Seamless pipe for diamond core drilling (GB3423-82) is a seamless pipe of drill pipe, core rod and casing for diamond core drilling.

9. Oil drilling pipe (YB528-65) is a seamless pipe used for internal or external thickening at both ends of oil drilling.

Seamless tube

10. Carbon steel Seamless Pipe for Ships (GB5312-85)

China Classification Society for Materials and Welding -- China Classification Society (CCS)

Norwegian Classification Society (DNV) specification -- Norwegian Classification Society (DNV)

Lloyd's Register of Shipping (LR) Specification -- LR

German Lloyd's Register of Shipping (GL) Specification

American Bureau of Shipping (ABS) Specification -- ABS

French Register of Shipping (BV) specification -- French Register of Shipping (BV)

Specifications of the Italian Register of Shipping (RINA) -- RINA

Japan Register of Shipping (NK) specifications -- Japan Register of Shipping (NK)

It is a seamless carbon steel pipe used in the manufacture of Class I pressure pipe system, Class II pressure pipe system, boiler and superheater. The working temperature of carbon steel seamless pipe wall shall not exceed 450℃, and the working temperature of alloy steel seamless pipe wall shall not exceed 450℃.

11. Seamless tube of automotive semi-axle bushing pipe (GB3088-82) is a hot rolled seamless tube of high-quality carbon structural steel and alloy structural steel for manufacturing automotive semi-axle bushing pipe and drive axle housing shaft pipe.

12. High pressure oil pipe for diesel engine (GB3093-86) is a cold-drawn seamless pipe for manufacturing high pressure pipe of diesel injection system.

13. Precision internal diameter seamless tubes for hydraulic and pneumatic cylinders (GB8713-88) are cold-drawn or cold-rolled precision seamless tubes with precision internal diameter for manufacturing hydraulic and pneumatic cylinders.

14. Cold drawn or cold rolled precision seamless pipe (GB3639-83) is used for mechanical structure, hydraulic equipment of high dimensional accuracy and good surface finish of cold drawn or cold rolled precision seamless pipe. Select precision seamless pipe manufacturing mechanical structure or hydraulic equipment.

15 Structure with stainless steel seamless pipe (GB/T14975-2002) is widely used in chemical, petroleum, textile, medical, food, machinery and other industries of corrosion resistant pipes and structural parts and parts made of stainless steel made of hot rolling (extrusion, expansion) and cold drawing (rolling) seamless pipe.

16. Seamless stainless steel pipe for fluid transport (GB/T14976-2002) is used to transport fluid made of stainless steel made of hot rolled (extrusion, expansion) and cold drawn (rolling) seamless pipe.

17. Special-shaped seamless pipe is the general name of seamless pipe with other section shapes except round pipe. According to the different section shape and size of steel pipe, it can be divided into equal wall thickness shaped seamless pipe (code D), unequal wall thickness shaped seamless pipe (code BD), variable diameter shaped seamless pipe (code BJ). Special-shaped seamless pipe is widely used in various structural parts, tools and mechanical parts.

18. Seamless steel pipe for low temperature pipeline (GB/T18984-2003) is used for -45℃ ~ -195℃ grade low temperature pressure vessel pipeline and low temperature heat exchanger pipeline with seamless steel pipe

Generally used seamless pipe is made of 10, 20, 30, 35, 45 and other high-quality carbon bonded steel 16Mn, 5MnV and other low alloy structural steel or 40Cr, 30CrMnSi, 45Mn2, 40MnB and other bonded steel hot or cold rolling. 10, 20 low carbon steel manufacturing seamless pipe is mainly used for fluid conveying pipe. 45, 40Cr and other medium carbon steel seamless pipe to manufacture mechanical parts, such as cars, tractor parts.

Generally use seamless pipe to ensure the strength and flattening test. Delivery of hot-rolled steel pipes in hot-rolled or heat-treated condition; Cold-rolled delivery in heat-treated condition. Low and medium pressure boiler seamless tube: used to manufacture all kinds of low and medium pressure boiler, superheated steam pipe, boiling water pipe, water wall pipe and locomotive boiler with superheated steam pipe, smoke pipe, small smoke pipe and arch brick pipe.

With high quality carbon structural steel hot or cold rolled (dial) seamless pipe. Mainly with 10, 20 steel manufacturing, in addition to ensure the chemical composition and mechanical properties to do hydraulic test, flange, flaring, flattening and other tests. Hot rolling in hot rolling condition, cold rolling (dial) in heat treatment condition.

Seamless tube theoretical calculation formula:

(OD -- wall thickness)× wall thickness ×0.02466= Weight of seamless tube per meter {kg}