BLACK AND HOT DIP GALVANIZED STEEL PIPES = ASTM A 135/A795 GRADE A / B
| NOMINAL PIPE SIZE |
OUTSIDE DIAMETER | WALL THICKNESS | WEIGHT OF BLACK PIPES | ||||||||
| STANDARD | STANDARD | PLAIN END PIPES | TEST PRESSURE | ||||||||
| INCH | MM | INCH | MM | INCH | MM | KG/MTR | MTR/TON | LB/FT | FT/TON | PSI | KPA |
| 3/4 | 20 | 1.050 | 26.7 | 0.083* | 2.11 | 1.28 | 781 | 0.86 | 2562 | 700 | 4830 |
| 1 | 25 | 1.315 | 33.4 | 0.109* | 2.77 | 2.09 | 478 | 1.41 | 1568 | 700 | 4830 |
| 1.1/4 | 32 | 1.660 | 42.2 | 0.109* | 2.77 | 2.69 | 372 | 1.81 | 1221 | 1000 | 6890 |
| 1.1/2 | 40 | 1.900 | 48.30 | 0.109* | 2.77 | 3.11 | 322 | 2.09 | 1056 | 1000 | 6890 |
| 2 | 50 | 2.375 | 60.3 | 0.109* | 2.77 | 3.93 | 254 | 2.64 | 833 | 1000 | 6890 |
| 2.1/2 | 65 | 2.875 | 73.0 | 0.120* | 3.05 | 5.26 | 190 | 3.53 | 623 | 1000 | 6890 |
| 3 | 80 | 3.500 | 88.9 | 0.120* | 3.05 | 6.46 | 155 | 4.34 | 509 | 1000 | 6890 |
| 3.1/2 | 90 | 4.000 | 101.6 | 0.120* | 3.05 | 7.41 | 135 | 4.98 | 443 | 1200 | 8270 |
| 4 | 100 | 4.500 | 114.3 | 0.120* | 3.05 | 8.37 | 119 | 5.62 | 390 | 1200 | 8270 |
| 5 | 125 | 5.563 | 141.3 | 0.134* | 3.40 | 11.58 | 86 | 7.78 | 283 | 1200 | 8270 |
| 6 | 150 | 6.625 | 168.3 | 0.134* | 3.40 | 13.85 | 72 | 9.30 | 237 | 1000 | 6890 |
| 8 | 200 | 8.625 | 219.1 | 0.188** | 4.78 | 25.26 | 40 | 16.96 | 130 | 800 | 5520 |
* Schedule 10 Thickness
** Not Schedule 10
CHEMICAL PROPERTIES
| ELEMENT ------> | Carbon | Manganese | Phosphorus | Sulphur |
| C | Mn | P | S | |
| GRADE-A | 0.25 | 0.95 | 0.035 | 0.035 |
| GRADE-B | 0.30 | 1.20 | 0.035 | 0.035 |
MECHANICAL PROPERTIES
| PROPERTIES ------> | Tensile Strength | Yield Strength | ||
| psi | MPa | psi | MPa | |
| GRADE-A | 48000 | 330 | 30000 | 205 |
| GRADE-B | 60000 | 415 | 35000 | 240 |
Min percent elongation in 2"(50mm) is
% El (Grade-A) = 56t + 16.5
% El (Grade-B) = 48t + 14
Where t = specified wall thickness (inch)
TOLERANCES
OUTSIDE DIAMETER
| SIZE FROM | SIZE TO | TOLERANCE INCH(MM) | |
| INCH (MM) | INCH (MM) | POSITIVE | NEGATIVE |
| 3/4 (20) | 1.1/2(40) | 1/64 (0.40) | 1/32 (0.80) |
| 2 (50) | 8 (200) | 1% OF OD | 1% OF OD |
THICKNESS : 12.5% max under the nominal wall thickness.
WEIGHT : +/-10% on calculated standard nominal weight.
HEAT TREATMENT
Weld seam of the ERW pipe in Grade-B shall be heat treated after welding to a minimum temperature of 10000F [5400C] so that no untempered martensite remains.
ZINC COATING
MINIMUM : 1.30 oz / ft2 [400 Gm / Mtr2]
AVERAGE : 1.50 oz / ft2 [460 Gm / Mtr2]
FLATTENING TEST
STAGE-1 : For weld ductility until 2/3 of outside dia of specimen tube.
STAGE-2 : For ductility of steel until 1/3 of outside dia of specimen tube.
STAGE-3 : Full flattening for testing of laminated and unsound material.
MARKING : Each pipe is stenciled as "JAZEERA STEEL OMAN, ASTM A135/A795 GR A / B-ERW SCH 10(or Thk-Inch) NPS-LENGTH-HEAT NO"