ASTM A53 pipe (also referred to as ASME SA53 pipe) is intended for mechanical and pressure applications and is also acceptable for ordinary uses in steam, water, gas, and air lines. It is suitable for welding, and suitable for forming operations involving coiling, bending, and flanging, subject to certain qualifications.
This specification covers seamless carbon steel pipe for high-temperature service
Sizes (Seamless): 1/2” NB - 60” NB
Sizes (ERW): 1/2” NB - 24” NB
Sizes (SAW): 16” NB - 100” NB
Wall Thickness available:
Schedule 20 - Schedule XXS (heavier on request) up to 250 mm thickness.
Material Grades :
| High Temperature Seamless Pipe |
ASTM A106 Gr. B/C, API 5L Gr. B, ASTM A53 Gr. B |
| Heat Exchanger Seamless Tube |
ASTM A179 |
| Low Temperature Seamless Pipe |
ASTM A333 Gr. 3/6 |
| Low Temperature Seamless Tube |
ASTM A334 Gr. 6 |
| High Yield Seamless Pipe |
API 5L Gr. X42/X46/X52/X56/X60/X65/X70/X80 PSL-1/PSL-2 |
| High Yield Seamless Pipe |
ISO 3183 Gr.L245, L290, L320, L360, L390, L415, L450, L485 |
| Atmospheric & Low Temp EFW Pipes |
ASTM A671 Gr. CC60/CC65/CC70 |
| High Pressure & Moderate Temp EFW Pipes |
ASTM A672 Gr. B60/B65/B70/C55/C60/C65/C70 |
| High Yield ERW/SAW Pipe |
API 5L Gr. X42/X46/X52/X56/X60/X65/X70/X80 PSL-1/PSL-2 |
| High Yield ERW/SAW Pipe |
ISO 3183 Gr.L245, L290, L320, L360, L390, L415, L450, L485 |
Additional Testing :
NACE MR0175, NACE TM0177, NACE TM0284, HIC TEST, SSC TEST, H2 SERVICE, IBR, etc.
Dimensions :
All Pipe is manufactured and inspected/tested to the relevant standards including ASTM, ASME, API.
Chemical Requirements
| |
Type S
(seamless) |
Type E(electric-
resistance welded) |
Type F(furnace-
welded pipe) |
| |
Grade A |
Grade B |
Grade A |
Grade B |
Grade A |
| Carbon max. % |
0.25 |
0.30 |
0.25 |
0.30 |
0.3 |
| Manganese % |
0.95 |
1.2 |
0.95 |
1.2 |
1.2 |
| Phosphorous, max. % |
0.05 |
0.05 |
0.05 |
0.05 |
0.05 |
| Sulfur, max. % |
0.045 |
0.045 |
0.045 |
0.045 |
0.045 |
| Copper, max. % |
0.40 |
0.40 |
0.40 |
0.40 |
0.4 |
| Nickel, max. % |
0.40 |
0.40 |
0.40 |
0.40 |
0.4 |
| Chromium, max. % |
0.40 |
0.40 |
0.40 |
0.40 |
0.4 |
| Molybdenum, max. % |
0.15 |
0.15 |
0.15 |
0.15 |
0.15 |
| Vanadium, min.% |
0.08 |
0.08 |
0.08 |
0.08 |
0.08 |
Permissible Variations in Wall Thickness
The minimum wall thickness at any point shall not be more than 12.5% under the nominal wall thickness specified.
Permissible Variations in Weights per Foot
Plus or minus 10%
Permissible Variations in Outside Diameter
Outside Diameter at any point shall not vary from standard specified more than
| For NPS 1 1/2 and Smaller Sizes |
For NPS 2 and Larger Sizes |
| 1/64" |
1/32" under |
1% over |
1%under |
Number of Tests Required
Seamless and Electric-Resistance-Welded -- Bending, flattening, tensile on one length of pipe from each lot of 500 lengths or less of a size.
Continuous-Weld -- Bending, flattening, tensile
| NPS 1 1/2 & smaller |
NPS 2 & larger |
| one / 25 tons |
one / 50 tons |
Hydrostatic Testing
Hydrostatic inspection test pressures for plain end and threaded and coupled pipe are specified. Hydrostatic pressure shall be maintained for not less than 5 seconds for all sizes of seamless and electric-resistance-weld pipe.Mechanical Tests Specified
Tensile Test -- Transverse required on ERW for NPS 8 and large.
Sending Test (Cold) -- STD and XS-NPS 2 and under XXS-NPS 1 1/4 and under.
|
Degree of Bend |
Diameter of Mandrel |
For Normal A53 Uses |
90 |
12 x nom dia. of pipe |
For Close Coiling |
180 |
8 x nom dia. of pipe |
Flattening Test -- NPS 2 and larger STD and XS. (Not required for XXS pipe.
