API油管规格及尺寸公称尺寸 (in)不加厚外径 (mm)不加厚内径 (mm)加厚外径(mm)加厚内径 (mm)不加厚接箍 外径(mm)加厚接箍 外径(mm)1 1/248.340.353.240.35563.52 3/860.350.365.950.373782 7/873.062.078.662.089.5933 1/288.975.995.2575.9107114.54101.688.6107.9588.61211274 1/2114.3100.3120.65100.3132.5141.5-1-石油油管螺纹代号对照表平式油管螺纹外加厚油管螺纹GB9253.3YB239-63GB9253.3YB239-631.900TBG1 1/2 "平式扣1.900UPTBG1 1/2"外加厚扣2 3/8 TBG2"平式扣2 3/8UPTBG2"外加厚扣2 7/8 TBG2匕"平式扣2 7/8UPTBG2 1/2"外加厚扣3 1/2 TBG3"平式扣3 1/2UPTBG3"外加厚扣4 TBG3 1/2"平式扣4UPTBG3 1/2"外加厚扣4 1/2 TBG4"平式扣4 1/2UPTBG4"外加厚扣套管规格及尺寸外径 mm (in)接箍外径 (mm)内径 (mm)通径 (mm)外径 mm (in)接箍外径 (mm)内径 (mm)通径 (mm)114.3(4 1/2)127.0103.9100.7177.8(7)194.5166.1162.9102.999.7164.0160.8101.698.4161.7158.599.696.4159.4156.2127(5)141.3115.8112.6193.7(7 5/J215.9178.5175.3114.1111.0177.0173.8112.0108.8174.6171.5108.6105.4171.8168.7139.7(5 1/2)153.7127.3124.1219.1(8 5/J244.5205.7202.5125.7122.6203.7200.5124.3121.1201.2198.0121.4118.2198.8195.6石油套管螺纹代号对照表短圆螺纹套管长圆螺纹套管偏梯形螺纹API SPEC 5CTYB690-70API SPEC 5CTYB690-70API SPEC 5CT4 1/2 CSG4 1/2"套管4 1/2 LCSG4 1/2 "长丝扣套管4 1/2 BCSG5 CSG5"套管5LCSG5"长丝扣套管5 BCSG5 1/2 CSG5 1/2 "套管5 1/2 LCSG5 1/2 "长丝扣套管5 1/2BCSG6 5/8 CSG6 5/8 "套管6 5/8 LCSG6 5/8 "长丝扣套管6 5/8 BCSG7 CSG7"套管7 LCSG7"长丝扣套管7 BCSG7 5/8 CSG7 5/8"套管7 5/8 LCSG7 5/8 "长丝扣套管7 5/8 BCSG8 5/8 CSG8 5/8"套管8 5/8 LCSG8 5/8 "长丝扣套管8 5/8 BCSG9 5/8 CSG9 5/8"套管9 5/8 LCSG9 5/8 "长丝扣套管9 5/8BCSG10 3/4 CSG10 3/4 "套管10 3/4 LCSG103/4"长丝扣套管10 3/4BCSG钻杆规格及尺寸（X、G、S钢级）规格外径mm （in）管体内径 （mm）内加厚 内径（mm）外加厚 外径（mm）规格外径mm （in）管体内径 （mm）内加厚 内径（mm）外加厚 外径（mm）60.3(2 3/)46.167.5114.3(4 1/2)97.2131.873.0(2 7/8 )54.633.381.8114.3(4 1/2)92.5131.888.9(3 1/2)76.057.297.1127~(5)112.095.288.9(3 1/2)70.249.297.1127(5)108.6146.1101.6(4)88.374.6114.3139.7(5 1/2)121.496.9141.3101.6(4)84.869.8114.3139.7(5 1/2)118.696.9141.3GB9253.1标准GB9253.1标准YB691-70GB9253.1标准YB691-70NC262 3/8 IF2A10/2A114 1/2 FH420/421NC312 7/8 IF210/2112 7/8 REG230/231NC383 1/2 IF310/3113 1/2 REG330/331NC504 1/2 IF410/4114 1/2 REG430/4313 1/2 FH320/3215 1/2 REGNC404 FH4A20/4A216 5/8 REG重量计算［（外径-壁厚）*壁厚］*0.02466二kg/米（每米的重量） 外径单位：毫米石油套管的钢级：H40， J55，K55，N80， L80， C90，T95， P110， Q125 等。
API规定长度有三种：即R-1为4.88〜7.62m, R-2为7.62〜10.36m, R-3为10.36m至更 长。