ASTM A106
Seamless carbon steel pipe for high-temperature service
The standard specification for seamless carbon steel pipe for high-temperature service, in Grades A, B and C. Grade B is the most widely used process pipe in refineries and power plants.
- Pipe & tube
- ASME SA-106
- 1 grade supplied to it
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is ASTM A106?
ASTM A106 is the specification for seamless carbon steel pipe for high-temperature service. Grades A, B and C differ in strength; Grade B is the standard process-piping grade. Sizes follow ASME B36.10. It is paired with ASTM A234 WPB fittings and ASTM A105 flanges. ASME adopts it as SA-106.
ASTM A106 at a glance
| Product | Seamless carbon steel pipe |
|---|---|
| Grades | A, B, C |
| Grade B strength | Pending current standard text |
| Sizes | ASME B36.10 — Sch 10 to XXS |
| ASME designation | SA-106 |
A106 vs A53 vs A333
| Specification | Construction | Typical use |
|---|---|---|
| ASTM A106 Gr B | Seamless only | High-temperature process piping |
| ASTM A53 Gr B | Seamless or ERW | General and utility piping |
| ASTM A333 Gr 6 | Seamless or welded, impact tested | Low-temperature service |
How to write ASTM A106 on a purchase order
Name the product, size, material specification and grade, the dimensional standard and the certificate. An example line:
Illustrative only — sizes, tests, inspection level and any project values come from your purchase specification.
ASTM A106 edition and verification status
Which edition we have confirmed, and what is still being checked before any numerical requirement is published here.
| Current edition | Not yet confirmed against the publisher listing |
|---|---|
| Full-text verification | In progress — numerical requirements are not published on this page |
| Edition on your order | The edition named in your purchase order or design code governs — confirm it with your enquiry |
What to know before ordering to ASTM A106
The points that decide whether material to ASTM A106 is accepted at inspection.
- Sizes and schedules follow ASME B36.10.
- Pipe dual-certified to A106 B, A53 B and API 5L B is common and accepted by most specifications.
- Matching fittings are ASTM A234 WPB and matching flanges are ASTM A105.
Grades and products we supply to ASTM A106
| Grade | Product | Designation on the certificate |
|---|---|---|
| ASTM A106 Gr B | Pipe & Tube | ASTM A106 Gr B |
How ASTM A106 fits into an order
A purchase order line is only complete when it names the material standard, the dimensional standard and the inspection document. Miss one and the mill, the inspector and the buyer can each read the order differently.
Standards used with ASTM A106
Same family
ASTM A106 — questions buyers ask
What is ASTM A106?
ASTM A106 is the specification for seamless carbon steel pipe for high-temperature service. Grades A, B and C differ in strength; Grade B is the standard process-piping grade. Sizes follow ASME B36.10. It is paired with ASTM A234 WPB fittings and ASTM A105 flanges. ASME adopts it as SA-106.
Is A106 always seamless?
Yes. Welded carbon steel pipe is ordered to other specifications such as A53 or API 5L.
Which fittings go with A106 Gr B pipe?
ASTM A234 WPB buttweld fittings and ASTM A105 flanges.
Which grades do you supply to ASTM A106?
ASTM A106 Gr B — see the table on this page for the exact product and designation.
What is the difference between ASTM A106 and ASME SA-106?
ASME SA-106 is the ASME Boiler and Pressure Vessel Code (Section II) adoption of ASTM A106. The technical requirements are usually identical to a specific ASTM edition; pressure-equipment codes call for the ASME designation, and most mill certificates show both.
Do you supply certificates to this standard?
Yes. Material is supplied with mill test certificates to EN 10204 3.1 showing the standard, grade and heat number; 3.2 with third-party inspection on request.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026