National standard spiral steel pipes, often referred to as 9711.1 or 9711.2, are widely used in various industries. These pipes are made from different materials such as 16Mn, Q345B, L245, L360, and even up to X40-X80 grades. They serve multiple purposes, including sewage treatment, water purification, water supply systems, power plants, chemical industries, nuclear facilities, and the transportation of both flammable and non-flammable fluids. In addition to national standards, they also comply with industry-specific standards like SY/T5037, API SPEC 5L, and EN10217. The manufacturing process involves hot-rolled steel strips, which are formed into a spiral shape and welded using automatic submerged arc welding techniques. These pipes are essential in the oil and gas sector for fluid transport and structural applications.
When working with steel products, it's important to understand the formulas for calculating their weight. Here are some commonly used calculations:
1. Weight of round steel per meter = 0.00617 × diameter²
2. Weight of spiral steel pipe per meter = (diameter - wall thickness) × wall thickness × 0.02466
3. Weight of square steel per meter = 0.00786 × side width²
4. Weight of hexagonal steel per meter = 0.0068 × opposite side diameter²
5. Weight of octagonal steel per meter = 0.0065 × diameter²
6. Weight of rebar per meter = 0.00617 × diameter²
7. Weight of equal angle steel per meter = side width × side thickness × 0.015
8. Weight of flat steel per meter = 0.00785 × thickness × width
9. Weight of seamless steel pipe per meter = 0.02466 × wall thickness × (outer diameter - wall thickness)
10. Weight of electric welded steel pipe per meter = same as seamless steel pipe
11. Weight of steel plate per square meter = 7.85 × thickness
12. Weight of brass tube per meter = 0.02670 × wall thickness × (outer diameter - wall thickness)
13. Weight of copper tube per meter = 0.02796 × wall thickness × (outer diameter - wall thickness)
14. Weight of aluminum tread plate per square meter = 2.96 × thickness
15. Specific gravity of non-ferrous metals: copper plate is 8.9, brass plate is 8.5, zinc plate is 7.2, lead plate is 11.37
16. Weight of non-ferrous metal sheets per square meter = specific gravity × thickness
17. Weight of square tube per meter = (side length + side length) × 2 × thickness × 0.00785
18. Weight of unequal angle steel per meter = 0.00785 × edge thickness × (long side width + short side width - edge thickness)
19. Weight of I-beam per meter = 0.00785 × waist thickness × [height + f (leg width - waist thickness)]
20. Weight of channel steel per meter = 0.00785 × waist thickness × [height + e (leg width - waist thickness)]
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