Factory direct sales Q235B spiral pipe, low price, good service, your satisfaction is my pursuit

材质：

Q235B

规格：

219*6,720*8,820*8,325*10,920*8,1620*10,1620*16,2020*16,1820*12

质量等级：

正品（受质量异议）

National standard spiral steel pipe 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 flammable flammable steel pipes. Steel pipes for fluid transportation, not suitable for cast pipes. []
National Standard Spiral Steel Pipe Standard Content
/ Part 1 specifies non-alloy materials used to transport flammable fluids and non-flammable fluids (including water) in the oil and gas industry in terms of basic quality and test requirements (grades) Technical delivery conditions for seamless and welded steel pipes of steel and alloy steel (excluding stainless steel). 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.
The main materials of national standard spiral steel pipe

Double-sided submerged arc welded spiral steel pipe
Double-sided submerged arc welded spiral steel pipe has high pressure bearing capacity, low resistance, low temperature resistance, and It is increasingly popular in industries such as oil and gas, slurry transportation, and urban construction due to its advantages such as corrosion resistance and convenient installation and maintenance. The process flow first undergoes full-board ultrasonic inspection.
High pressure bearing capacity, low resistance, low temperature resistance
Oil and gas, slurry transportation, urban construction
The process flow first carries out full-board ultrasonic inspection