异径管公称通径 nominal diameter 公称通径 nominal diameter 坡口处外径 outside diameter 端面至端面的距离 end to end d1*d2 dn nps a系列 b系列 h 20×15 3/4×1/2 26.9×21.3 25×18 38 20×10 3/4×3/8 26.9×17.3 25×14 38 25×20 1×3/4 33.7×26.9 32×25 51 25×15 1×1/2 33.7×21.3 32×18 51 32×25 1.1/4×1 42.4×33.7 38×32 51 32×20 1.1/4×3/4 42.4×26.9 38×25 51 32×15 1.1/4×1/2 42.4×21.3 38×18 51 40×32 1.1/2×1.1/4 48.3×42.4 45×38 64 40×25 1.1/2×1 48.3×33.7 45×32 64 40×20 1.1/2×3/4 48.3×26.9 45×25 64 40×15 1.1/2×1/2 48.3×21.3 45×18 64 50×40 2×1.1/2 60.3×48.3 57×45 76 50×32 2×1.1/4 60.3×42.4 57×38 76 50×25 2×1 60.3×33.7 57×32 76 50×20 2×3/4 60.3×26.9 57×25 76 65×50 2.1/2×2 73.0×60.3 76×57 89 65×40 2.1/2×1.1/2 73.0×48.3 76×45 89 65×32 2.1/2×1.1/4 73.0×42.4 76×38 89 65×25 2.1/2×1 73.0×33.7 76×32 89 80×65 3×2.1/2 88.9×73.0 89×76 89 80×50 3×2 88.9×60.3 89×57 89 80×40 3×1.1/2 88.9×48.3 89×45 89 80×32 3×1.1/4 88.9×42.4 89×38 89 90×80 3.1/2×3 101.6×88.9 - 102 90×65 3.1/2×2.1/2 101.6×73.0 - 102 90×50 3.1/2×2 101.6×60.3 - 102 90×40 3.1/2×1.1/2 101.6×48.3 - 102 90×32 3.1/2×1.1/4 101.6×42.4 - 102 100×90 4×3.1/2 114.3×101.6 - 102 100×80 4×3 114.3×88.9 108×89 102 注：上述尺寸符合gb/t12459、gb/t13401、asme b16.9、sh3408、sh3409、hg/t21635、hg/t21631、sy/t05010标准 above dimeio acc.to gb/t12459、gb/t13401、asme b16.9、sh3408、sh3409、hg/t21635、hg/t21631、sy/t05010