Year1
- 材质：
- Q235B
- 规格：
- 630*12,630*16,325*9,1820*18,1620*20,2020*18
- 质量等级：
- 正品（受质量异议）
The national standard spiral steel pipe is mainly based on the standard of / oil and gas industry transportation steel pipe, which includes (representative grade steel) and (representative grade steel). The quality and test requirements are generally higher than the regulations generally applicable to Steel pipes for transporting flammable fluids, not suitable for cast pipes.
The main materials of the national standard spiral steel pipe
,
The content of the national standard spiral steel pipe standard
/ Part 1 specifies the basic quality and test requirements (grades) for transportation in the oil and gas industry Technical delivery conditions for non-alloy steel and alloy steel (excluding stainless steel) seamless and welded steel pipes for flammable fluids and non-combustible fluids (including water). This standard includes threaded and extra heavyweight threaded steel pipes without threads, extra light heavyweight unthreaded, ordinary heavyweight unthreaded, extra heavyweight unthreaded and extra heavyweight unthreaded steel pipes as well as socket and spigot steel pipes. The dimensional requirements of threads and thread gauges, measurement method requirements, technical requirements and calibration of gauges, instruments and methods for inspecting threads are given in, and/, and are applicable to the products covered by this standard. The steel grades covered by this standard are, and and intermediate grades between those listed in the table and the higher grades. As shown in the table, the ordinary heavyweight unthreaded and special light heavyweight unthreaded steel pipes, as well as the threaded steel pipes with nominal dimensions larger than (see table), are marked as outer diameter. For other steel pipes, the size marking is the nominal size of the steel pipe. In each chapter of the main text of this standard, wherever the size boundary (or size range) of the steel pipe is specified, unless it is noted as the nominal size, it refers to the outer diameter size. These outer diameter dimension lines and ranges also apply to the corresponding nominal dimensions.
.Spiral tube is a commonly used material in spiral tubes. It is a spiral seam steel pipe that is made of strip steel coils as raw materials, extruded at regular temperatures, and welded by automatic double-wire double-sided submerged arc welding technology.
./ is made of hot-rolled steel strip coils as pipe rings, often heated and spirally formed, and made by double-sided automatic submerged arc welding or single-sided welding. It is used for general low-pressure liquid transportation such as water, gas, air, and steam. Use submerged arc welded steel pipe. / is the petroleum ministry standard, generally called the ministry standard. Spiral seam submerged arc welded steel pipe for general low-pressure fluid transportation () is a submerged arc welded steel pipe made by double-sided automatic submerged arc welding or single-sided welding for general low-pressure fluid transportation such as water, gas, air, and steam.
.Theoretical weight formula of spiral steel pipe (outer diameter, wall thickness), wall thickness. Weight per meter (kg/m)
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