Related Specifications
Surface Treatments
Certifications
- ISO 9001 - 2015 Certified
- PED 2014/68/EC
- NACE MR0175/ISO 15156-2
- NORSOK M-650
- DFAR
- MERKBLATT AD 2000 W2/W7/W10
ASME SA-193 Grade B16 Bolting Specification
ASME Boiler and Pressure Vessel Code Section II Part A Reproduction of ASTM A193 B16
ASME SA-193 Grade B16 is the ASME Boiler and Pressure Vessel Code Section II Part A reproduction of ASTM A193 Grade B16. Chemistry, mechanical properties, and supplementary requirements are identical. The two specifications differ only in administrative scope: ASTM A193 is the underlying ASTM-published standard, while ASME SA-193 is the ASME-republished version used for material that will carry the ASME stamp on a pressure-vessel data package.
SA-193 B16 vs A193 B16 - the differences
| Aspect | ASTM A193 B16 | ASME SA-193 B16 |
|---|---|---|
| Publisher | ASTM International | ASME (reproduced from ASTM) |
| Where invoked | Piping codes (B31.1, B31.3), flange code (B16.5), distributor stock | ASME BPVC Section II Part A material specifications for pressure-vessel-attached bolting |
| Chemistry | A193 Table 1 | Identical to A193 Table 1 |
| Mechanical properties | A193 Table 2 | Identical to A193 Table 2 |
| Supplementary requirements | S1 - S12 supplements | Same S-supplements; ASME-specific Section II Part A requirements added |
| Certificate language | Standard EN 10204 mill certificate | Mill certificate references SA-193 + ASME stamp data package |
| Grade marking | B16 (or B16R with S12) | B16 with ASME stamp |
| Interchangeable physical material | YES - A193 B16 = SA-193 B16 at the material level | YES |
When to specify SA-193 B16 vs A193 B16
- SA-193 B16 : pressure-vessel-attached bolting under the ASME BPVC stamp (Section VIII Div 1, Div 2, Div 3); ASME-stamped bolting that goes into the vessel data package; project specifications that explicitly require the SA prefix (common in US and Saudi Arabian pressure-vessel work)
- A193 B16: piping flange bolting per ASME B31.1 / B31.3; flange bolting per ASME B16.5; distributor stock; general industrial high-temperature bolting where the ASME data package is not the procurement vehicle
ASME data-package requirements (Section II Part A specific)
When bolting is supplied under SA-193 for pressure-vessel attachment, the mill certificate must include the following additional ASME-specific data:
- SA-193 specification number explicitly cited on the certificate
- ASME Code Case number (if applicable for grade restrictions or service-specific permissions)
- Heat-treatment record sufficient for ASME inspector review (austenitise + temper temperatures and times)
- Tensile-test result traceable to the heat-treat lot
- Authorized Inspector (AI) sign-off on the certificate for ASME-stamped applications
- Material-Test-Report (MTR) format aligned with ASME BPVC NB-2000 / VIII-2 Article 3.10 requirements
Available SA-193 B16 product forms
- Stud bolts per ASME B18.31.2 (inch) / B18.31.1M (metric)
- Heavy hex bolts per ASME B18.2.1 / B18.2.3.3M
- Threaded rods per ASME B18.31.2 (inch) / B18.31.1M (metric)
- Round bar (mill source) per ASTM A29 + ASTM A484 dimensional tolerances
Certification regime under SA-193
- EN 10204 Type 3.1 mill certificate (default) - references SA-193 specification, heat-treatment record, full chemistry and mechanical test results
- EN 10204 Type 3.2 third-party witnessed (DNV, Lloyd’s Register, TÜV, Bureau Veritas) - for high-criticality ASME-stamped equipment
- ASME Code Section II Part A traceability - mill records preserved for the duration required by the vessel registration
- PED 2014/68/EC certificate - European Pressure Equipment Directive compliance
- NORSOK M-650 QTR - if applicable for offshore SA-193 bolting
Related TorqBolt resources
Satisfaction Survey
