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Implementation standard for heavy wall seamless steel pipes

Date:2022-08-15View:65Tags:Implementation standard,heavy wall seamless steel pipes

Implementation standard for heavy wall seamless steel pipes

 

1,Seamless steel tube for structure (GB/T8162-2008) is a seamless steel tube for general structure and mechanical structure.

 

2,Seamless steel tube for fluid transportation (GB/T8163-2008) is a general seamless steel tube used for conveying water, oil, gas and other fluids.

 

3,Seamless steel tube for low and medium pressure boiler (GB3087-2008) is used for the manufacture of various structures of low and medium pressure boiler superheated steam pipe, boiling water pipe and locomotive boiler superheated steam pipe, large smoke pipe, small smoke pipe and arch brick pipe pipe of high quality carbon structural steel hot rolled and cold drawn (rolled) seamless steel tube.

 

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

 

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

 

6,Seamless steel tube for petroleum cracking (GB9948-2006) is a seamless steel tube for furnace tube, heat exchanger and pipeline of petroleum refinery.

 

7,Steel pipe for geological drilling (YB235-70) is a steel pipe used for core drilling by geological departments. According to the purpose, it can be divided into drill pipe, drill collar, core pipe, casing and precipitation pipe, etc.

 

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

 

9,Oil drilling pipe (YB528-65) is used for oil drilling at both ends of the inner or outer thickening of seamless steel pipe. Steel pipe is divided into two kinds of wire and wire, wire pipe joint connection, wire pipe butt welding method and tool joint connection.

 

10,Marine carbon steel seamless steel pipe (GB5213-85) is a kind of carbon steel seamless steel pipe used in the manufacture of ship class I pressure tube system, class II pressure tube system, boiler and superheater. The working temperature of carbon steel seamless steel tube wall shall not exceed 450, and that of alloy steel seamless steel tube wall shall not exceed 450.

 

11,Seamless steel tube (GB3088-82) is a hot rolled seamless steel tube of high quality carbon structural steel and alloy structural steel for the manufacture of automobile half bushing pipe and drive axle housing shaft pipe.

 

12,Diesel engine high pressure tubing (GB3093-86) is a cold drawn seamless steel tube used to manufacture diesel engine injection system high pressure pipe.

 

13,Precision inner diameter seamless steel tube for hydraulic and pneumatic CYLINDERS (GB8713-88) is a cold-drawn or cold-rolled precision seamless steel tube with precision inner diameter for the manufacture of hydraulic and pneumatic cylinders.

 

14,Cold drawn or cold rolled precision seamless steel pipe (GB3639-83) is used for mechanical structure, hydraulic equipment, high dimensional accuracy and good surface finish of cold drawn or cold rolled precision seamless steel pipe. Choosing precision seamless steel pipe to manufacture mechanical structures or hydraulic equipment can greatly save machining hours, improve the utilization rate of materials, and improve the quality of products.

 

 



Heavy wall seamless steel tubes are classified by material

 

Steel pipe material for 10#, 20#, 35#, 45# called ordinary steel pipe, alloy steel pipe.

 

 

performance

 

Steel grade

Mechanical properties

Cold drawn (rolled) pipe

Gold pipe cutting

20 #

Tensile strength σBN /mm2 elongation δ5%

510

390

5

20

45#

647

590

4

4

 


Forula to calculate

 

Seamless steel tube weight per meter W=0.02466*S(D-S)

 

Symbolic meaning :D= outer diameter S= wall thickness


Seamless steel pipe price per meter =(outer diameter - wall thickness)* wall thickness *0.02466* price per kilogram

 

 

Allowable deviation

 

Level of deviation

Normalized outside diameter allowable deviation

D1

±1.5%, minimum ± 0.75mm

D2

±1.0%, minimum ± 0.50mm

D3

±0.75%, minimum ± 0.30mm

D4

±0.50%, minimum ± 0.10mm

 


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