Bhandari
Piping ASTM
S.S. Piping to ASTM A-312 (Welded)
Introduction and Scope - This cover straight seam welded (without the addition of filler metal) austenitic stainless steel pipe intended for high temperature and general corrosive services.
Materials - Material is ordered with the requirements of ASTM A-240 in 340, 340L, 316 & 316L grades regularly. Special grades can be made as per Customer's requirements.
Size Range
- OD: 3/8" NB (17.2mm) to 8" NB (219.1mm)
- Thickness: NB size in schedule 5, 10S & 40S
- Length: As per Customer requirement.
Process Of Manufacture - The pipe is manufactured from annealed strips on modern continous forming mills with TIG welding process under intert gas atmosphere. All pipes are annealed at a minimum temperature of 1050ยบ C, straightened, pickled and passivated, end finished & 100 % tested in accordance with ASTM A-530.
Tolerances
| OD Size Range | Over MM | Under MM |
| Upto 1" NB | 0.40 | 0.79 |
| Over 1" NB to 4" NB | 0.79 | 0.79 |
| Over 4" NB to 8" NB | 1.57 | 0.79 |
Thickness: + or - 12.5% to the nominal wall thickness.
Length: - 0 / + 6 mm
Test -
Normal: Tensile strength / Yield strenght / Elongation
- Flattening
- Hydrostatic Pressure test
Optional: Pneumatic / Air leakage
- Eddy Current
- IG Corrosion
Marking: All pipes are marked as folows: Bhandari,ASTM A-312 , Grade, Nominal size ,Schedule No, Heat No.
| Sl no. | Outside Dia | Wall Thickness (in mm) | ||||||
| SCH 5 | SCH10S | SCH 40S | ||||||
| Inch | MM | Thick | Kg/mtr | Thick | Kg/mtr | Thick | Kg/mtr | |
| 1 | 3/8" | 17.2 | 1.20 | 0.48 | 1.65 | 0.64 | 2.31 | 0.86 |
| 2 | 1/2" | 21.3 | 1.65 | 0.81 | 2.11 | 1.01 | 2.77 | 1.29 |
| 3 | 3/4" | 26.7 | 1.65 | 1.03 | 2.11 | 1.3 | 2.87 | 1.71 |
| 4 | 1" | 33.4 | 1.65 | 1.31 | 2.77 | 2.12 | 3.38 | 2.54 |
| 5 | 1 1/4" | 42.2 | 1.65 | 1.67 | 2.77 | 2.73 | 3.56 | 3.43 |
| 6 | 1 1/2" | 48.3 | 1.65 | 1.93 | 2.77 | 3.15 | 3.68 | 4.11 |
| 7 | 2" | 60.3 | 1.65 | 2.42 | 2.77 | 3.98 | 3.91 | 5.52 |
| 8 | 2 1/2" | 73.0 | 2.11 | 3.74 | 3.05 | 5.34 | 5.16 | 8.76 |
| 9 | 3" | 88.9 | 2.11 | 4.58 | 3.05 | 6.54 | 5.49 | 11.45 |
| 10 | 3 1/2" | 101.6 | 2.11 | 5.25 | 3.05 | 7.52 | 5.74 | 13.77 |
| 11 | 4" | 114.6 | 2.11 | 5.92 | 3.05 | 8.48 | 6.02 | 16.31 |
| 12 | 5" | 141.3 | 2.77 | 9.5 | 3.4 | 11.74 | 6.55 | 22.1 |
| 13 | 6" | 168.3 | 2.77 | 11.47 | 3.4 | 14.04 | 7.11 | 28.68 |
| 14 | 8" | 219.1 | 2.77 | 14.99 | 3.76 | 20.25 | 8.18 | 43.16 |
Due to variations between different specifications comparisons made exactly, physical, chemical and mechanical values are also typical and should not be taken as being accurate.