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JIS G3452 Galvanized Pipes DIMENSIONS, WEIGHT AND DIMENSIONAL TOLERANCES OF JIS G3452 PIPES
| JIS G3452 Dimensions, Weights and Dimensional Tolerances | |||||||
| Nominal Diameter |
O.D. mm |
O.D. Tolerances |
W.T. mm |
W.T. Tolerances |
Unit Mass excluding Socket kg/m |
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| A | B | Pipes to be cut in taper thread | Other pipes | ||||
| 6 | 1/8 | 10.5 | ±0.5mm | ±0.5mm | 2 |
+Not specified -12.50% |
0.419 |
| 8 | 1/4 | 13.8 | ±0.5mm | ±0.5mm | 2.3 | 0.652 | |
| 10 | 3/8 | 17.3 | ±0.5mm | ±0.5mm | 2.3 | 0.851 | |
| 15 | 1/2 | 21.7 | ±0.5mm | ±0.5mm | 2.8 | 1.31 | |
| 20 | 3/4 | 27.2 | ±0.5mm | ±0.5mm | 2.8 | 1.68 | |
| 25 | 1 | 34 | ±0.5mm | ±0.5mm | 3.2 | 2.43 | |
| 32 | 1 1/4 | 42.7 | ±0.5mm | ±0.5mm | 3.5 | 3.38 | |
| 40 | 1 1/2 | 48.6 | ±0.5mm | ±0.5mm | 3.5 | 3.89 | |
| 50 | 2 | 60.5 | ±0.5mm | ±1% | 3.8 | 5.31 | |
| 65 | 2 1/2 | 76.3 | ±0.7mm | ±1% | 4.2 | 7.47 | |
| 80 | 3 | 89.1 | ±0.8mm | ±1% | 4.2 | 8.79 | |
| 90 | 3 1/2 | 101.6 | ±0.8mm | ±1% | 4.2 | 10.1 | |
| 100 | 4 | 114.3 | ±0.8mm | ±1% | 4.5 | 12.2 | |
| 125 | 5 | 139.8 | ±0.8mm | ±1% | 4.5 | 15 | |
| 150 | 6 | 165.2 | ±0.8mm | ±1.6mm | 5 | 19.8 | |
| 175 | 7 | 190.7 | ±0.9mm | ±1.6mm | 5.3 | 24.2 | |
| 200 | 8 | 216.3 | ±1.0mm | ±0.8% | 5.8 | 30.1 | |
| 225 | 9 | 241.8 | ±1.2mm | ±0.8% | 6.2 | 36 | |
| 250 | 10 | 267.4 | ±1.3mm | ±0.8% | 6.6 | 42.4 | |
| 300 | 12 | 318.5 | ±1.5mm | ±0.8% | 6.9 | 53 | |
| 350 | 14 | 355.6 | – | ±0.8% | 7.9 | 67.7 | |
| 400 | 16 | 406.4 | – | ±0.8% | 7.9 | 77.6 | |
| 450 | 18 | 457.2 | – | ±0.8% | 7.9 | 87.5 | |
| 500 | 20 | 508 | – | ±0.8% | 7.9 | 97.4 | |
DIMENSIONAL TOLERANCES OF JIS G3452
JIS G3452 Galvanized Pipes Outside Diameter Tolerance
| Classification | Outside Diameter b) |
Tolerances on Outside Diameter c) |
Applicable Division |
| Class 1 | Under 50mm | ± 0.5mm |
Applied when there is no specification. Applicable to hot-finished seamless steel tubes. |
| 50mm or Over | ± 1% | ||
| Class 2 | Under 50mm | ± 0.25mm |
Applied when there is a specification. Not applicable to hot-finished seamless steel tubes. |
| 50mm or Over | ± 0.5% | ||
| Notes | a) For the local parts such as repaired parts if the wall thickness can be confirmed to be within the tolerance in the table below, the outside diameter tolerance of this table need not be applied. |
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| b) The method for measuring the outside diameter of tubes exceeding 350mm in outside diameter may be determined by the circumferential length. The mutual conversion of outside diameter D and the circumferential length l shall be by the following formula: D = l / π Where D: outside diameter (mm) l: circumferential length (mm) π：3.1416 |
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| c) The tolerances on the outside diameter of ends of electric resistance welded and automatic arc welded steel tubes exceeding 350mm in outside diameter shall be ±0.5%. |
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JIS G3452 Galvanized Pipes Wall Thickness Tolerance
| Classification | For Seamless Steel Tube | For Other than Seamless Steel Tube | Applicable Division | ||
| Wall Thickness | Tolerance of Wall Thickness | Wall Thickness | Tolerance of Wall Thickness | ||
| Class 1 | Under 4mm | +0.6mm, -0.5mm | Under 4mm | +0.6mm, -0.5mm |
Applied when there is no specification. Applicable to hot-finished seamless steel tubes. |
| 4mm or Over | +15%, -12.5% | 4mm or Over to and excl. 12mm | +15%, -12.5% | ||
| 12mm or Over | +15%, -1.5mm | ||||
| Class 2 | Under 3mm | ±0.3mm | Under 3mm | ± 0.3mm |
Applied when there is a specification. Not applicable to hot-finished seamless steel tubes. |
| 3mm or Over | ±10% | 3mm or Over to and excl. 12mm | ±10% | ||
| 12mm or Over | +10%,-1.2mm | ||||
| Notes | a) The tolerances on the wall thickness of tubes exceeding 1016.0 mm in outside diameter may be agreed upon between the manufacturer and the purchaser. | ||||
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