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Tubular Products
Common Specifications
Listed below are the five most commonly referenced specifications when pipe is ordered
from
U. S. Steel. Tolerance tables are shown below the general descriptions. All
tolerance values are to be applied to nominal specified dimensions. For information on
specification requirements for mechanical properties, visit the product description
areas. Please click on the specification name to visit the publisher's Web site and
order a copy of the specification.
API 5CT  |
This American Petroleum Institute (API) specification covers
seamless and welded steel casing, tubing and liners for the oil and gas industry.
|
| API 5D |
This American Petroleum Institute (API) specification covers
seamless steel drill pipe used in the oil and gas industry.
|
| API 5L |
This American Petroleum Institute (API) specification covers
seamless and welded steel line pipe for use in conveying gas, water and oil
in the oil and natural gas industries.
|
| ASTM A53 |
This American Society for Testing and Materials specification
covers seamless and welded steel pipe intended for mechanical and pressure
applications, including ordinary uses in steam, water, gas and air lines.
|
| ASTM A106 |
This American Society for Testing and Materials specification
covers seamless carbon steel pipe for high temperature service. |
| Pipe O.D. Tolerance |
| API 5CT |
<4.5" O.D.: ± 0.031"
4.5" O.D. and larger: +1.0%, -0.5% |
| API 5D |
4.0" O.D. and less: ± 0.031"
4.5" O.D. and larger: +1%, -0.5% |
| API 5L |
2.375" and < 20": ± 0.75%
20" and larger Seamless: ± 1.0%
20" to 36" ERW: + .75% - .25% |
| ASTM A53 |
NPS 2 and over: ±1.0% |
| ASTM A106 |
NPS 1½ to 4, inclusive: ± 0.031"
NPS 5 to 8, inclusive: +0.062", -0.031"
NPS 10 to 18, inclusive: +0.093", -0.031"
NPS 20 to 26, inclusive: +0.125", -0.031" |
|
| Wall Tolerance |
| API 5CT |
-12.5% |
| API 5D |
-12.5% |
| API 5L |
>2.875" and <20": +15.0%, -12.5%
20" and larger Welded, Grade B: +17.5%, -12.5%
20" and larger Welded, X42 and Higher: +19.5%, -8.0%
20" and larger Seamless, Grade B: +15.0%, -12.5%
20" and larger Seamless, X42 and Higher: +17.5%, -10% |
| ASTM A53 |
-12.5% |
| ASTM A106 |
-12.5% |
|
| Weight Tolerance |
| API 5CT |
Single Length: +6.5%, -3.5%
Carload Lot: -1.75% |
| API 5D |
Single Length: +6.5%, -3.5%
Carload Lot: -1.75% |
| API 5L |
Single
Length: +10.0%, -3.5%
Carload Lot: -1.75% |
| ASTM A53 |
± 10% |
| ASTM A106 |
+10%, -3.5% |
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