Seamless steel pipe execution standard

Seamless steel pipe execution standard

1. Seamless steel pipes for structural use (GB/T8162-2008) are mainly used for general and mechanical structures. Representative materials (grades): Carbon steel 20 #, 45 #, etc; Alloy steel: Q345, 20Cr, 40Cr, 20CrMo, 30-35CrMo, 42CrMo, etc.
   
2. Seamless steel pipes for fluid transportation (GB/T8163-2008) are mainly used for transporting fluid pipelines on engineering and large equipment. The representative materials (grades) are 20 #, Q345, etc.
   
3. Seamless steel pipes for low and medium pressure boilers (GB3087-2008) are high-quality carbon structural steel hot-rolled and cold drawn (rolled) seamless steel pipes used to manufacture various structures of superheated steam pipes, boiling water pipes, and superheated steam pipes and arch brick pipes for locomotive boilers. The representative materials are 10 #, 20 #, etc.
   
4. Seamless steel pipes for high-pressure boilers (GB5310-2008) are high-quality carbon steel, alloy steel, and stainless heat-resistant seamless steel pipes used for the heating surface of water tube boilers with high pressure and above. Representative materials include 20G, 12Cr1MoVG, 15CrMoG, etc.
   
5. Seamless steel pipes for petroleum cracking (GB9948-2006) are suitable for furnace tubes, heat exchangers, and pipelines in petroleum refineries. Its representative materials are 20 #, 12CrMo, 1Cr5Mo, 1Cr19Ni11Nb, etc.
   
6. High pressure seamless steel pipes for fertilizer equipment (GB1479-2000) (GB6479-2000) are high-quality carbon structural steel and alloy steel seamless steel pipes suitable for chemical equipment and pipelines with working temperatures of -40~400 ℃ and working pressures of 10~30Ma. Representative materials include 20 #, 16Mn, 12CrMo, 12Cr2Mo, etc.
   
7. Cold drawn or cold-rolled precision seamless steel pipes (GB3639-2000) are used for mechanical structures and hydraulic equipment with high dimensional accuracy and good surface smoothness. Choosing precision seamless steel pipes to manufacture mechanical structures or hydraulic equipment can greatly save machining hours, improve material utilization, and also contribute to improving product quality. Its representative materials are 20 #, 45 #, etc.
   
8. Seamless steel pipe for automotive half shaft sleeve (GB3088-82) (YB/T5035-1993) is a high-quality hot-rolled seamless steel pipe made of carbon structural steel and alloy structural steel for manufacturing automotive half shaft sleeve and drive axle housing shaft sleeve. Its representative materials are 45 #, 45Mn2, 40Cr, 20CrNi3A, etc.
   
9. Seamless carbon steel and carbon manganese steel pipes for ships (GB5312-1999) are carbon steel seamless pipes used for manufacturing Class I and II pressure resistant piping systems for ships, boilers, and superheaters. The working temperature of carbon steel seamless steel pipe wall shall not exceed 450 ℃, and the working temperature of alloy steel seamless steel pipe wall shall exceed 450 ℃. The representative materials are 360, 410, 460 steel grades, etc.
   
10. Bearing steel pipe (YB/Z12-77YJZ84) refers to seamless steel pipe that is hot-rolled or cold-rolled (cold drawn), used for manufacturing ordinary rolling bearing rings. Chromium bearing steels such as GCr6, GCr9 (SiMn), GCrl5 (SiMn); Chromium free bearing steels such as GSiMnV (Re), GSiMnMoV (Re), GMnMoV (Re); Carbonized bearing steel such as G20CrMo, G20Cr2Mn2Mo; High carbon chromium stainless bearing steel such as 9Cr18 (Mo), etc.
    
11. Characteristics of seamless steel pipe (Q/OHAD011-1997a) for steel bar connection sleeve: 1. Made of 45 # steel, with special manufacturing process, high dimensional accuracy, and reliable quality. 2. Can connect HRB335 and HRB400 ribbed steel bars with a diameter of 16 to 40mm. 3. Tested by the National Construction Quality Supervision and Inspection Center, it meets the Class I joint standard in JGJ107-2010. 4. There are three major series: standard type, positive and negative thread type, and reducing type, with 52 varieties, which can meet the requirements of connecting steel bars of the same diameter, reducing diameter, adjustable length and direction in horizontal, vertical, diagonal and other parts of building structures.
    
12.  High pressure fuel pipes for diesel engines (GB3093-2002) are cold drawn seamless steel pipes used to manufacture high-pressure pipes for diesel injection systems. The steel pipe is generally cold drawn, and its representative material is 20A.
    
13.  Precision inner diameter seamless steel pipe for hydraulic and pneumatic cylinder tubes (GB8713-88) is a cold drawn or cold-rolled precision seamless steel pipe with precise inner diameter dimensions used for manufacturing hydraulic and pneumatic cylinder tubes. Its representative materials are 20, 45 steel, etc.
    
14.  Hot rolled seamless steel pipes for hydraulic supports (GB/T17396-1998) are mainly used to make coal mine hydraulic supports and cylinders, columns, as well as other hydraulic cylinders and columns. Its representative materials are 20, 45, 27SiMn, etc.
    
15.  Seamless steel pipes for low-temperature pipelines (GB/T18984-2003) are suitable for use in low-temperature pressure vessel pipelines and low-temperature heat exchanger pipelines ranging from -45 ℃ to -195 ℃.
    
16.  Seamless steel pipes for gas cylinders (GB18248-2000) are mainly used to make various gas and hydraulic gas cylinders. Its representative materials are 37Mn, 34Mn2V, 35CrMo, etc.
    
17.  Oil drilling pipe (YB528-65) is a seamless steel pipe used for oil drilling with inner or outer thickening at both ends. Steel pipes are divided into two types: threaded and non threaded. Threaded pipes are connected with joints, while non threaded pipes are connected with tool joints by butt welding.
    
18. Geological drilling steel pipe (YB235-70) is a steel pipe used by geological departments for core drilling. It can be divided into drill rods, drill collars, core pipes, casings, and sedimentation pipes according to its purpose.
    
19.  Seamless steel pipe for diamond core drilling (GB3423-82) is a seamless steel pipe used for drill rods, core rods, and casing in diamond core drilling.
    
20.  The casing and tubing specification (API SPEC5CT-1999) is compiled and published by the American Petroleum Institute (API) and is widely used worldwide. Among them: casing: a pipe that extends from the ground surface into the drilling well as a lining for the wellbore, and is connected between the pipes through couplings. The main materials are J55, N80, P110 and other steel grades, as well as C90, T95 and other steel grades resistant to hydrogen sulfide corrosion. Its lower steel grades (J55, N80) can be welded steel pipes. Oil pipe: a pipe inserted into a casing from the ground surface until it reaches the oil layer, and its pipes are connected by couplings or integral connections. Its function is to transport the oil from the reservoir to the surface through oil pipes by the pumping unit. The main materials are J55, N80, P110, as well as steel grades such as C90 and T95 that are resistant to hydrogen sulfide corrosion. Its lower steel grades (J55, N80) can be welded steel pipes.
    
21. The Pipeline Specification (API SPEC 5L-2000) is compiled and published by the American Petroleum Institute and is widely used around the world. It is the transportation of oil, gas, or water from the shaft to the oil and gas industry through pipelines. Pipeline pipes include seamless and welded pipes, with flat ends, threaded ends, and socket ends at the pipe ends; The connection methods include end welding, clamp connection, socket connection, etc. The main materials are steel grades such as B, X42, X56, X65, X70, etc.
    
22. Cold drawn seamless steel pipe with irregular shape (GB/T3094-1986) is mainly used to produce various structural components and parts, and its material is high-quality carbon structural steel and low-alloy structural steel.
    
23. Irregular seamless steel pipe is a general term for seamless steel pipes with cross-sectional shapes other than round pipes. According to the different cross-sectional shapes and sizes of steel pipes, they can be divided into equal wall thickness irregular seamless steel pipes (code D), unequal wall thickness irregular seamless steel pipes (code BD), and variable diameter irregular seamless steel pipes (code BJ). Irregular seamless steel pipes are widely used in various structural components, tools, and mechanical parts. Compared with circular pipes, special-shaped pipes generally have larger moments of inertia and section moduli, and have greater bending and torsional resistance, which can greatly reduce structural weight and save steel.
    
24. Seamless steel pipes (Q/OHAD003-94) for top rods are widely used in various industries and have strong compressive strength. Commonly used grades: 1CrMo, etc.
    
25. Seamless steel pipes (YBn1-86) for shells are used in military steel pipes. Commonly used grades: 40Mn2, D60, etc.
    
26. Stainless steel seamless steel pipes for structural use (GB/T14975-2002) are hot-rolled (extruded, expanded) and cold drawn (rolled) seamless steel pipes made of stainless steel that are widely used in industries such as chemical, petroleum, textile, medical, food, and machinery for corrosion-resistant pipelines, structural components, and parts.
    
27. Stainless steel seamless steel pipes for fluid transportation (GB/T14976-2002) are hot-rolled (extruded, expanded) and cold drawn (rolled) seamless steel pipes made of stainless steel used for fluid transportation. Representative materials include 0Cr13, 0Cr18Ni9, 1Cr18Ni9Ti, 0Cr17Ni12Mo2, 0Cr18Ni12Mo2Ti, etc.
    
28. Stainless steel seamless steel pipes for structural use (GB/T14975-1994) are mainly used as atmospheric and acid resistant steel pipes with certain strength for general structures and mechanical structures in chemical enterprises. Its representative materials are 0-3Cr13, 0Cr18Ni9, 1Cr18Ni9Ti, 0Cr18Ni12Mo2Ti, etc.
    
29. Stainless steel seamless steel pipes for boilers and heat exchangers (GB13296-1991) are mainly used for boilers, superheaters, heat exchangers, condensers, catalytic tubes, etc. in chemical enterprises. High temperature, high pressure, and corrosion-resistant steel pipes. Representative materials include 0Cr18Ni9, 1Cr18Ni9Ti, 0Cr18Ni12Mo2Ti, etc.