| ASTM A672 B55 / B60 / B65 / B70
Engineered for Demanding High-Pressure Services
In critical industries such as petrochemical, power generation, and high-temperature pipeline networks, pipeline reliability determines project safety and service life. ASTM A672 Grade B55, B60, B65, and B70 EFW pipes deliver superior mechanical properties and strict manufacturing controls, making them the optimal choice for high-pressure transmission applications.
Key Advantages
Progressive Pressure Ratings
From B55 to B70 – increasing yield and tensile strength to match medium‑pressure through extra‑high‑pressure system requirements.
Standardized EFW Process
Manufactured to ASTM A672, using submerged arc welding with 100% NDT inspection, ensuring weld quality equivalent to the base metal.
Excellent High‑Temperature Toughness
Suitable for elevated temperatures and transient overpressure conditions. Low‑temperature impact properties (e.g., CVN) available upon request.
Flexible Sizes & Finishes
Typical outer diameter from 72'' (1800mm), with custom wall thickness. Offered as bare pipe, bevelled ends, or with anti‑corrosion coating.
Typical Applications
High‑pressure steam lines (thermal & nuclear power conventional islands)
Oil & gas long‑distance transmission and station piping
High‑temperature chemical reactor connecting lines
District heating main networks
Industrial boiler outlet headers
Quick Grade Selection Table
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Recommended Pressure Level |
|---|---|---|---|
| B55 | ≥205 | ≥415 | Medium Pressure |
| B60 | ≥240 | ≥450 | Medium‑High Pressure |
| B65 | ≥275 | ≥485 | High Pressure |
| B70 | ≥290 | ≥515 | Extra‑High Pressure |
Note: Values are per ASTM A672. Grades can be further customized with impact testing, normalizing, or tempering as required.
Why Choose Us?
End‑to‑End Quality Control – Traceable from plate reinspection → forming → welding → heat treatment → NDT → hydrostatic test.
Full Certifications – ISO 9001, API 5L, PED, etc.
Global Track Record – Reliable supply for high‑pressure projects in the Middle East, Southeast Asia, South America, and beyond.
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