Petroleum steel pipe is a kind of long steel with hollow section and no joint around, while petroleum cracking pipe is a kind of economic section steel.Role: widely used in the manufacture of structural and mechanical parts, such as oil drill pipe, automobile drive shaft, bicycle frame and steel scaffolding used in construction, etc.Using petroleum cracking tube to manufacture ring parts can improve material utilization rate, simplify manufacturing process, save material and processing time, such as rolling bearing ring, jack sleeve, etc., has been widely used to manufacture steel pipe.Petroleum cracking tube or a variety of conventional weapons indispensable material, barrel, barrel and so on to petroleum cracking tube to manufacture.Petroleum cracking pipe can be divided into round pipe and special-shaped pipe according to the shape of cross-sectional area.Since the area of petroleum cracking pipe is the largest with the same perimeter, more fluid can be transported with circular pipe.

API 5CT is divided into K55, N80, L80, P110 and other steel grades.

Tubing J55 (37Mn5)

Casing J55 (37Mn5)

Coupling pipe J55 (37Mn5)

Petroleum steel pipe (GB/T9948-88) is a seamless steel pipe suitable for furnace tube, heat exchanger and pipeline in petroleum refinery.

Steel pipe for geological drilling (YB235-70) is used for core drilling by geological department, which can be divided into drill pipe, drill collar, core pipe, casing pipe and precipitation pipe according to its use.

Seamless steel pipe implementation standard

2. Ground seam steel pipe for conveying fluid: GB8163-99; 3. Seamless steel pipe for boiler: GB3087-1999; 4.

5, fertilizer equipment for high pressure seamless steel pipe: GB/T6479-1999 6, geological drilling for seamless steel pipe: YB235-70 7, oil drilling for seamless steel pipe: YB528-65 8, oil cracking seamless steel pipe: GB9948-88

Seamless steel pipe for automobile half shaft: GB3088-1999 11. Seamless steel pipe for ship: GB5312-1999 12. Cold drawn cold rolled precision seamless steel pipe: GB/T3639-1999

13, all kinds of seamless steel pipe 16Mn, 27SiMn,15CrMo, 35CrMo, 12CrMov, 20G, 40Cr,12Cr1MoV,15CrMo

In addition,There are also GB/T17396-1998 (hot-rolled seamless steel tube for hydraulic prop), GB3093-1986 (high-pressure seamless steel tube for diesel engine), GB/T3639-1983 (cold-drawn or cold-rolled precision seamless steel tube), GB/T3094-1986 (cold-drawn seamless steel tube special-shaped steel tube), GB/T8713-1988(Precision inner diameter seamless steel tubes for hydraulic and pneumatic cylinders), GB13296-1991 (seamless stainless steel tubes for boilers and heat exchangers), GB/T14975-1994 (seamless stainless steel tubes for structure), GB/T14976-1994 (seamless stainless steel tubes for fluid transportation) GB/T5035-1993 (automobile)Seamless steel tube for bushing pipe), API SPEC5CT-1999 (specification for casing and tubing), etc.