A106 Steel Pipe Introduction
ASTM A106 is a seamless carbon steel pipe standard developed by the American Society for Testing and Materials (ASTM). This standard includes three grades: Grade A, Grade B, and Grade C. Grade B is the most commonly used grade and is considered equivalent to ASTM A53 Grade B and API 5L Grade B in terms of chemical composition and mechanical properties. This type of pipe is widely used in various industries. The following will introduce you to ASTM A106 from the aspects of chemical composition, mechanical strength, etc.
A106 steel pipe test method
All three grades of ASTM A106 are subject to bend test, flattening test, hydrostatic test, non-destructive electrical test, ultrasonic test, eddy current test and magnetic flux leakage test. If you purchase steel pipes, Pandapipe will communicate and confirm with you to determine which specific tests will be applied.
A106 Steel Pipe Stretching Requirements
|
Mechanical Properties |
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|
Grade |
A |
B |
C |
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|
Tensile stength, min, psi |
48000[330] |
60000[415] |
70000[485] |
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|
Tensile stength, min, psi |
30000[205] |
35000[240] |
40000[275] |
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|
Elongation (gauge length 2in, or 50mm), ≥, % |
Longitudinal |
Transverse |
Longitudinal |
Transverse |
Longitudinal |
Transverse |
|
35 |
25 |
30 |
16.5 |
30 |
16.5 |
|
|
When using standard circular specimens with a gauge length of 2 in or 50 mm, the longitudinal strip test |
28 |
20 |
22 |
12 |
20 |
12 |
|
For the transverse strip test, for each 1/32 inch (0.8 mm) reduction in wall thickness below 5/16 inch (7.9 mm), a corresponding percentage shall be deducted from the following basic minimum elongation. |
1.25 |
1.00 |
1.00 |
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Elongation Formula:
When the gauge length is within 2 inches [50 mm], the minimum elongation shall be calculated by the following equation:
e = 625 000 A^0.2 / U^0.9
A106 Steel Pipe Stretching Requirements
|
Chemical Composition |
Carbon, max |
Manganese |
Phosphorus, max |
Sulfer, max |
Silicon, min |
Chrome, max |
Copper, max |
Molybdenum, max |
Nickel, max |
Vanadium, max |
|
|
A |
0.25 |
0.27-0.93 |
0.035 |
0.035 |
0.10 |
0.40 |
0.40 |
0.15 |
0.40 |
0.08 |
|
|
B |
0.30 |
0.29-1.06 |
0.035 |
0.035 |
0.10 |
0.40 |
0.40 |
0.15 |
0.40 |
0.08 |
|
|
C |
0.35 |
0.29-1.06 |
0.035 |
0.035 |
0.10 |
0.40 |
0.40 |
0.15 |
0.40 |
0.08 |
Please note:
As long as the maximum carbon content is reduced by 0.01%, the manganese content can be increased by 0.06% above the specified maximum value, up to a maximum of 1.35%.
The total content of the five elements Cr, Cu, Mo, Ni, and V shall not exceed 1%.
Size tolerance range
Weight
The weight of each pipe is not allowed to exceed 10% of the specified value and not less than 3.5%. However, if you have special weight requirements, you can discuss with Pandapipe and we will tailor the weight you need for you.
Thickness
The minimum wall thickness at any point is less than the specified nominal wall thickness by no more than 12.5%
Diameter
The deviation of the outer diameter cannot be greater than the specified value in the table below.
|
NPS Designator |
Permissible Variations in Outside Diameter |
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|
Over |
Under |
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|
in. |
mm |
in. |
mm |
|
|
1/8 to 1 1/2, incl |
1/64 (0.015) |
0.4 |
1/64 (0.015) |
0.4 |
|
Over 1 1/2 to 4, incl |
1/32 (0.031) |
0.79 |
1/32 (0.031) |
0.79 |
|
Over 4 to 8, incl |
1/16 (0.062) |
1.59 |
1/32 (0.031) |
0.79 |
|
Over 8 to 18, incl |
3/32 (0.093) |
2.38 |
1/32 (0.031) |
0.79 |
|
Over 18 to 26, incl |
1/8 (0.125) |
3.18 |
1/32 (0.031) |
0.79 |
|
Over 26 to 34, incl |
5/32 (0.156) |
3.97 |
1/32 (0.031) |
0.79 |
|
Over 34 to 48, incl |
3/16 (0.187) |
4.76 |
1/32 (0.031) |
0.79 |
A106 steel pipe application areas
Petrochemical and energy transportation: high-pressure oil and gas pipelines, process pipelines in refineries and chemical plants.
Power and boiler equipment: high-pressure boilers in thermal power plants, high-temperature steam pipelines in power plants
Machinery manufacturing and heavy structures: heavy-duty shelf systems, mechanical equipment frames, brackets and connectors
Construction and bridge engineering: bending load-bearing components in bridge reinforcement, steel frames and support columns.
