Note: The weights listed below are theoretical weights (kg/m), calculated based on a steel density of 7.85 g/cm³. Actual weights may vary slightly due to wall thickness tolerances.

Outside Diameter (OD mm)	Wall Thickness (WT mm)	Theoretical Weight (kg/m)	Typical Applications
219	6	31.52	Municipal drainage, small-diameter water transmission
219	8	41.18	Medium-pressure water transmission, structural pipe
273	6	39.43	General water pipelines
273	8	51.58	Municipal engineering, circulating water systems
325	6	47.34	Water supply and drainage projects
325	8	62.03	Medium to low-pressure water transmission
377	6	55.23	Municipal pipeline networks
377	8	72.49	Industrial water transportation
426	6	62.49	General engineering pipelines
426	8	82.15	Pressurized water transmission
478	6	70.24	Water pipelines / structural support
478	8	92.31	Medium-pressure pipelines
529	6	77.92	Municipal water supply
529	8	102.38	Industrial water transportation
630	6	93.12	Main water transmission pipelines
630	8	122.30	High-flow water transmission
720	8	139.60	Urban main water supply lines
820	8	159.10	Large-scale water transmission projects
920	10	222.50	High-pressure water pipelines
1020	10	247.80	Main supply / industrial pipelines
1220	12	356.40	Large-scale water conservancy projects
1420	14	485.70	Long-distance water transmission
1620	16	627.90	Extra-large engineering pipelines
1820	18	785.20	Ultra-large diameter water transmission
2020	20	957.60	Extra-large water transmission systems

Core Formula for Calculating Theoretical Weight:

W = (D − t) × t × 0.0246615

W = Theoretical weight per meter of steel pipe (unit: kg/m)
D = Outer diameter of steel pipe (unit: mm)
t = Wall thickness of steel pipe (unit: mm)

Calculation Example:

Take a spiral steel pipe with an outer diameter of 529 mm and a wall thickness of 8 mm as an example:

W = (529 − 8) × 8 × 0.0246615 = 521 × 8 × 0.0246615 ≈ 102.79 kg/m