T O L E R A N C E S TOLERANCES OF ASTM SPECIFICATIONS FOR PIPES AND TUBES Specification Allowable Outside Diameter Variations in mm Allowable Wall Thickness Variations Exact Length Tolerances in mm Testing ASTM - 106 Seamless Pipe For High Temp. A 335 Seamless Ferritic Alloy Steel Pipe for High Temp. Service. Diameter 3-40 Incl. Over 40-100 Incl. Over 100-200 Incl. Over 200-450 Incl. Over 450-650 Incl. Over 650-850 Incl. Over 0.4 0.8 1.6 2.4 3.2 4.0 Under 0.8 0.8 0.8 0.8 0.8 0.8 Over% Under% +12.5 -12.5 +12.5 -12.5 +12.5 -12.5 +12.5 -12.5 +12.5 -12.5 +12.5 -12.5 Over Under 6 0 6 0 6 0 6 0 6 0 6 0 Product Analysis Tension Test, Flattening Test, 100% Hydro test ASTM A - 249 Welded boiler, Superheater, Heat Exchanger and Condensor Tubes under 25.4 25.4 - 38.1 incl. 38.1 - 50.8 excl. 50.8 - 75.2 excl. 63.5 - 75.2 excl. 76.2 - 101.6 incl. 0.1016 0.1524 0.2032 0.2540 0.3048 0.3810 0.1016 0.1524 0.2032 0.2540 0.3048 0.3810 +10  -10 +10  -10 +10  -10 +10  -10 +10  -10 +10  -10 Minimum Wall Tubes + 18% - )Available on request 3.175    0 3.175    0 3.175    0 4.76    0 4.76    0 4.76    0 Product Analysis Tension Test, Flattening Test, Flara tst / Flange Test *Reverse Bend Test Hardness Test *Reverse Flattening Test Refer to ASTM A-450 *wherever Applicable ASTMA.312 seamiess & welded pipes 13.7 - 48.3 incl. 48.3 - 114.3 incl. 114.3 - 220 incl. 0.40 0.79 1.59 0.79 0.79 0.79 Minimum Wall Tubes 12.5% under Nominal wall specified 6.4    0 6.4    0 6.4    0 (Normally Random lengths ordered) Product Analysis Tension Test Flattening Test 100% Hydro Test ASTMA - 269 Seamless & Welded Service Upto 12.7 12.7-38.1 excl. 38.1-88.9 excl. 88.9-139.7 excl. 139.7-203.2 excl. 0.13 0.13 0.25 0.38 0.76 0.13 0.13 0.25 0.38 0.76 +15  -15 +10  -10 +10  -10 +10  -10 +10  -10 3.2  0 3.2  0 4.8  0 4.8  0 4.8  0 Product Analysis Flare Test Flange Test (Welded) Hardness Test Reverse Flattening Test (welded only) 100% Hydro Test ASTMA - 213 Seamless Boiler Superheater and Heat Exchanger Tubes Under 25.4 25.4 - 38.1 incl. 38.1 - 50.8 excl. 50.8 - 63.5 encl. 63.5 - 76.2 excl. 76.2 - 101.6incl. 0.1016 0.1524 0.2032 0.2540 0.3048 0.3810 0.1016 0.1524 0.2032 0.2540 0.3048 0.3810 +20  -0 +20  -0 +22  -0 +22  -0 +22  -0 +22  -0 3.175  0 3.175  0 3.176  0 3.760  0 4.760  0 4.760  0 Product Analysis Tension Test Flattening Test Flare Test Hardness Test 100% Hydro Test ASTMA - 268 seamiess & welded Under 12.7 12.7 - 38.1 excl. 38.1 - 88.9 excl. 0.13 0.13 0.25 0.13 0.13 0.25 +15  -15 +10  -10 +10  -10 3.2  0 3.2  0 4.8  0 Product Analysis Tension Test Trasvers Tension Test (ERW only)Hardness Test Reverse Flattening Test 100% Hydro Test ASTM A- 358 For Welded big Diameter Pipes For all Size +0.5% +0.5% No  -0.3 Limit mm Customer's specification Product Analysis Transvers Tension Test Transvers Guided Bend Test Hydro Test Radiographic Examination (As Specified) Dye Penetrant (optional) Tolerances for Mild steel Pipes SPEC OUTSIDE DIAMETER WALL THICKNESS WEIGHT LENGTH PIPE BODY PIPE END NOMINAL Ang.Min Minimum Maximum ft mtr ft mtr ft mtr ft mtr API 5L < 20 inch size +/- 0.75% >=20 inch and <=36" size +0.75%-0.25% <= 10 3/4 inch-Size + 1.59 mm (1/16")-0.40 mm (1/64") >10 3/4 and <=42 inch size + 2.38mm (3/32").0.79mm(1/32") < 20 inch size + 15.0% - 12.5% >=20 inch size + 15.0%-12.5% >=20 inch size + 17.5%-12.5% (for Gr. B or lower) + 19.50% - 8.0% (Gr. X-42 or higher) Single length of pipe + 10%,-3.5% Carloades 40,000 lb (18,144 kg) or more - 1.75%, less - 3.5% 20 6.0 17.5 5.33 9.0 2.74 22.5 6.86 < 20 inch size +/- 0.75% <= 10 3/4 inch-Size + 1.59 mm (1/16")-0.40 mm (1/64") < 20 inch size + 15.0% - 12.5% Carloades 40,000 lb (18,144 kg) or more - 1.75%, less - 3.5% 40 12.0 35 10.67 14.0 4.27 45.0 13.72 IS:1978 60.3 and above +/ 1% +0.75%-0.25% <=273.1mm OD = + 1.60mm-0.40mm 323.9 mm OD & larger pipe = +2.40 mm-0.80 mm 101.6 mm to 457.2 mm OD=+ 15%-12.5% Single length of pipe + 10%, -3.5% - 6.0 - 5.3 - 2.70 - - 508 mm and above + 17.5% - 10.0% Carloades:- for min. 18,000 kg-1.75% - 12.0 - 10.7 - 4.30 - - 1S:1979 < 508.0 mm OD +/- 0.75% < 273.1mm OD = + 1.60mm-0.40mm <= 457.0 mm OD pipe = +15.o%-12.5% Single length of pipe + 10%-3.5% - 6.0 - 5.3 - 2.70 - - > 508.0 mm OD pipe =+/-1.0% 323.9 mm OD & larger pipe = + 2.40 mm - 0.80 mm >=508.0 mm OD pipe = +19.5%-8.0% Carloades:- for min.18,144 kg - 1.75% - 12.0 - 10.7 - 4.30 - - ASTM A-53 Pipe 2" NPS and over=+/- 1.0% - At any point - 12.5% (Max) Tm=Tn X 0.875 Tn=Nominal w.t Tm=Minimum W.t +/-10% 20 40 6.0 12.0 - 35 - 10.67 16 22 4.88 6.71 22 - 6.71 - IS:3589 Upto 508 mm OD = +/- 0.75% - +/- 10% - - 6.0 12.0 - - - - - - 4.00 7.00 - - 7.0 14.0 IS:4270 +/- 1.0% - upto 406.4 mm OD= + 15%-12.5% over 406.4 mm OD = +15%-10% +10%-8% - - 6.0 - - - - - - - 4.0 - - - 7.0 - API-5CT 4-1/2" and larger = + 1.0%-0.5% od OD 5" larger = + 1.0%-0.016" -12.50% Single length of pipe +6.5%,-3.5% Carloades:- for min 40,000 lb or more-1.75% Range ft/mtr 16/4.88 min ft/mr 25/7.62 max Range ft/mtr 25/7.62 min ft/mr 34/10.36 max Range ft/mtr 34/10.36 min ft/mr 48/14.63 max Home | About Us | Contact Us | Sitemap | Feedback Products | Copper Plumbing | Inspection | Analysis | Tolerances | Schedule Charts © 2009 www.mokshiind.com - All Rights Reserved. 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