标准 | 外径(mm) | 壁厚(mm) | 长度(mm) | 范围 | 偏差 | 范围 | 偏差 | 范围 | 偏差 | ASTM A312 | [10.29,48.26] | +0.40/-0.80 | [10.29,73.03] | +20%/-12.5% | L ≦ 7.3m | +6/-0 | (48.26,114.30] | +0.80/-0.80 | [88.9 , 457.2] ( t/D ≦ 5% ) | +22.5%/-12.5% | (114.30,219.08] | +1.60/-0.80 | [88.9 , 457.2] ( t/D > 5% ) | +15%/-12.5% | (219.08,457.20] | +2.40/-0.80 | D ≧ 508 ( t/D ≦ 5% ) | +22.5%/-12.5% | 薄壁管( t/D ≦ 3% )椭圆度条件:钢管任一截面 D *大 -D *小≦ 1.5%D 公称,并且该截面*大与*小直径的平均值( D *大 +D *小) /2 符合规定直径的公差范围 | D ≧ 508 ( t/D > 5% ) | +15%/-12.5% | 外径≦ NPS12 的钢管的重量偏差: +10%/-3.5% ;外径> NPS12 的钢管的重量偏差: +10%/-5% | ASTM A213 | D < 25.4 | +0.10/-0.10 | D ≦ 38.1 | +20%/-0 | D < 50.8 ; L ≦ 7.3m | +3/-0 | 〔25.4,38.1] | +0.15/-0.15 | (38.1,50.8) | +0.20/-0.20 | [50.8,63.5) | +0.25/-0.25 | D > 38.1 | +22%/-0 | D ≧ 50.8 ; L ≦ 7.3m | +5/-0 | [63.5,76.2) | +0.30/-0.30 | [76.2 101.6] | +0.38/-0.38 | (101.6,190.5] | +0.38/-0.64 | (190.5,228.6] | +0.38/-1.14 | 薄壁管椭圆度条件:薄壁管任一截面*大与*小直径的平均值须符合规定直径的公差范围,并且椭圆度(任一截面外径读数差)应不超过下列允许值: D ≦ 25.4 ,允许值为 0.5mm;D > 25.4 ,允许值为规定外径的 2% 注:薄壁管定义: D ≦ 50.8 , t ≦ 2%D ; D > 50.8 , t ≦ 3%D ;, t ≦ 0.5mm | 对于外径≧ 50.8mm 和壁厚≧ 5.6mm 的钢管,任一截面的壁厚偏差不得超过该截面平均壁厚的 10% | 如 L > 7.3m; 每增加 3 米或其剩余部分,允许增加 3mm 正公差,*大为 12.7mm | ASTM A269 | D < 12.7 | +0.13/-0.13 | 薄壁管定义 : | ±15% | L ≦ 7.3m | +3.2/-0 | [12.7,38.1) | +0.13/-0.13 | t < 1.65mm | ±10% | [38.1,88.9) | +0.25/-0.25 | t < 2.41mm | ±10% | L ≦ 7.3m | +4.8/-0 | [88.9,139.7) | +0.38/-0.38 | t < 3.81mm | ±10% | [139.7,203.2) | +0.76/-0.76 | t < 3.81mm | ±10% | 薄壁管椭圆度条件:薄壁管任一截面的外径与公称直径偏差为上表中规定偏差的 2 倍,并且薄壁管任一截面*大与*小直径的平均值须符合规定直径的公差范围 | 如 L > 7.3m; 每增加 3 米或其剩余部分,允许增加 3mm 正公差,*大为 12.7mm | ASTMA511 表三 | a | 壁厚为下列值时 ( 薄壁管 ) ,双倍外径公差 | q | D < 12.7 | +0.13/-0.13 | t < 0.38mm | ±15% | L ≦ 7.3m | +3.2/-0 | [12.7,38.1) | +0.13/-0.13 | t < 1.65mm | ±10% | [38.1,88.9) | +0.25/-0.25 | t < 2.41mm | L ≦ 7.3m | +4.8/-0 | [88.9,139.7) | +0.38/-0.38 | t < 3.81mm | [139.7,203.2) | +0.76/-0.76 | t < 6.09mm | [203.2,219.08) | +1.14/-1.14 | t < 7.62mm | [219.08,323.85] | +1.57/-1.57 | t < 8.89mm | 薄壁管椭圆度条件:薄壁管任一截面的外径与公称直径偏差为上表中规定偏差的 2 倍,并且薄壁管任一截面*大与*小直径的平均值须符合规定直径的公差范围 | 如 L > 7.3m; 每增加 3 米或其剩余部分,允许增加 3mm 正公差,*大为 12.7mm | ASTMA511 表四 | D < 76.2 | +0.58/-0.58 | S ≦ 2.77 | ±16.5% | L ≦ 7.3m | +4.76/-0 | 2.77 < S ≦ 4.37 | ±15% | 4.37 < S ≦ 5.16 | ±14% | S > 5.16 | ±12.5% | L > 7.3m | 每增加 3 米或其剩余部分,允许增加 3mm 正公差,*大为 12.7mm | (76.2,139.7) | +0.79/-0.79 | S ≦ 2.77 | ±16.5% | 2.77 < S ≦ 4.37 | ±15% | 4.37 < S ≦ 5.16 | ±14% | S > 5.16 | ±12.5% | [139.7,203.2) | +1.19/-1.19 | 4.37 < S ≦ 5.16 | ±14% | S > 5.16 | ±12.5% | [203.2,273.05) | +1.19/-1.19 ( t/D ≧ 5% ) | S > 5.16 | ±12.5% | [273.05,323.85] | +1.6/-1.6 ( t/D < 5% ) | S > 5.16 | ±12.5% | JIS G3459 | D < 30 | +0.30/-0.30 | S < 2 | ±0.20 | a | a | D ≧ 30 | ±1% | S ≧ 2 | ±10% | JIS G3463 | D < 40 | +0.25/-0.25 | D < 40;S < 2 | +0.40/-0 | D ≦ 50;L ≦ 7m | +7/-0 | [40 , 50 ) | D ≦ 50;L > 7m | 长度每增加 3 米或其零头,在上面的正侧允许 偏差上加 3mm 。*大 15mm | [50 , 60 ) | [60 , 80 ) | +0.30/-0.30 | D < 40;S ≧ 2 | +20%/-0 | [80 , 100 ) | +0.40/-0.40 | [100 , 120 ) | +0.40/-0.60 | D > 50;L ≦ 7m | +10/-0 | [120 , 160 ) | +0.40/-0.80 | D ≧ 40 | +22%/-0 | D > 50;L > 7m | 与 D ≦ 50 ; L > 7m | [160 , 200 ) | +0.40/-1.20 | 內容相同 | D ≧ 20 0 | +0.40/-1.60 | a | DIN17456 DIN17458 | D2 | ±1.0% ±0.5 min | T3 | ±10% ±0.2 min | D ≦ 40;L ≦ 1m | +1/-0 | D ≦ 40;L:(1-2]m | +2/-0 | D3 | ±0.75% ±0.3 min | D ≦ 40;L:(2-3]m | +3/-0 | D ≦ 40;L:(3-4]m | +4/-0 | T4 | ±7.5% ±0.15 min | D ≦ 40;L:(4-8]m | +5/-0 | D4 | ±0.5% ±0.1 min | 40<D≦168 | | | L ≦ 6m | | +5/-0 | L > 6m | +10/-0 | D > 168 | +10/-0 | GB/T 14975--94 | [10, 30] | +0.30/-0.30 | S ≦ 3 | ±14% | 通常长度 1~8 m | +15/-0 | (30, 50] | +0.40/-0.40 | S > 3 | +12%/-10% | D > 50 | ±0.9% | a | a | GB/T 14976--94 | [6, 10] | +0.20/-0.20 | [0.5, 1.0] | ±0.15 | 通常长度 2~8 m | +15/-0 | (10, 30] | +0.30/-0.30 | (1.0, 3] | ±14% | (30, 50] | +0.40/-0.40 | S > 3 | +12%/-10% | D > 50 | ±0.9% | a | a | GB13296 --91 | [8, 30] | +0.20/-0.20 | [1.0, 3.0] | +12%/-10% | 通常长度 3~8m | +15/-0 | (30, 50] | +0.30/-0.30 | S > 3 | ±10% | D > 50 | ±0.8% | q | q | GB5310-95 | f 30 | ± 0.20 | 2~3 | +12%/-10% | a | +20/-0 | > 30~50 | ± 0.30 | > 3 | ±10% | > 50 | ±0.8% | a | a | | |