Year1
- 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）
Spiral pipe is a commonly used material in spiral pipes. 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)
. Origin/manufacturer of materials above specifications, Cangzhou, Hebei
. Trademark
.Quality grade symbol Deoxidation method symbol
.Quality grade points, in order of poor quality, highest quality. The deoxidation method symbols are and, which respectively represent boiling steel, semi-killed steel, killed steel and special killed steel. However, in the grade representation method, the symbols and can be omitted.
, different grades represent mainly different impact temperatures.
. Refers to the difference between no impact and above degrees, above degrees, above degrees, above degrees, and refers to the difference in impact temperature in their performance.
.They are divided into grades, which are not required for impact toughness test, grade for normal temperature (℃) impact toughness test, grade for ℃ impact toughness test, grade for ℃ impact toughness test, and grade for ℃ impact toughness test. The impact toughness test uses Charpy notch specimens. The impact toughness index is. The above grades of steel are required to meet their respective different temperature requirements. At different impact temperatures, the impact values are also different.
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