National Standard Specification and Weight Table for Welded Pipe and Galvanized Pipe (implemented according to GB/T3091-2001) \x0d\x0d\ Specification external diameter mm wall thickness mm minimum wall thickness mm welded pipe (length is 6m) \x0d\ meter weight kg root weight kg \ dn 15 1/22 1 . 32 . 82 . 82 . 32 . 32 . 4823 1.53 189. 18 \ X0d \ dn 20082 19. 1 6.5 \ X0d \ (Hot dip galvanizing) 36.12216.72 \ x0d \ x0d \ mmmmmm ordinary steel pipe thickened steel pipe \ X0d \ 6 10.0265433S- black iron pipe wall thickness \ x0d \ x0d \ w = 0. The weight of steel pipe =0.25×π× (square of outer diameter-square of inner diameter )× l× specific gravity of steel, where π = 3. 14 L= the length of steel pipe, and the specific gravity of steel pipe is 7.8, so if the density of steel is 7.85g/cm3 \x0d\ Then the weight of steel pipe =0.25×3. 14× (square of outer diameter-square of inner diameter )×× l× 7.8 * The basic formula is: \x0d\W (weight, kg )=F (cross-sectional area mm2)×L (length, m)×ρ (density, g). W = 0.006 165×d×d \ x0d \ d = mm \x0d\ 65433 d = weight per meter = 0.00617×122 = 0.89kg \ x0d \ A= width mm \x0d\ width 20 mm. Weight per meter = 0.00785× 202 = 3.14kg \ x0d \ flat steel \ x0d \ (kg/m) \ x0dw = 0.006798× s× s \ x0. Weight per meter = 0.006798 ×502= 17kg \x0d\ octagonal steel \ x0d \ (kg/m) \ x0d \ w = 0.0065× s× s \ x0d \ s = mm \ x0d \ 80mm away from the opposite side. Weight per meter = 0.0065× 802 = 41.62kg \ x0d \ equilateral angle steel \ x0d \ (kg/m) \ x0d \ = 0.00785x [d (2b _ d)+0.215. R is 1.2, then the weight per meter is equal to 0 \ x0d \ (kg/m) \ x0d \ w = 0.00785× [d (b+b _ d)+0.215 (R2 _ 2R2)] \ From the metallurgical product catalogue, it is found that the 30 ×20 ×4 unequal angle steel R is 3.5 and R is 1.2, so the weight per meter is = 0.00785× [4× (30+20 _ 4)+0.215× (3.52 _ 2×/kloc. (kg/m) \ x0d \ w = 0.00785× [HD+2t (b _ d)+0.349 (R2 _ R2)] \ x0d \ h = height \x0d\b= leg length \x0d\d= waist thickness \ x0d \. Then the weight per meter = 0.00785× [80× 5+2× 8× (43 _ 5)+0w = 0.00785× [HD+2t (b _ d)+0.615 (R2 _ R2)] \ x0d \ h = height. According to the metal material manual, I-beam T is 13, R is 10, and R is 5. Weight per meter = 0.00785× [250×10+2×13× (18 _10)+0.615× (102).