1. What is ASTM A671 CC60 Class 30?
Definition: Premium-grade EFW pipe for ultra-high-pressure and cryogenic service, engineered for critical energy and industrial applications.
Key Specs:
Yield Strength: 60 ksi (414 MPa) at -20°F (-29°C).
Pressure Rating: 15,000 psi (1,034 bar) (Class 30).
Material: Carbon steel with enhanced low-temperature toughness (Charpy V-notch ≥20 ft-lb at -50°F/-45°C).
2. Primary Applications
Oil & Gas:
Ultra-deepwater pipelines (>3,000m).
High-pressure gas injection systems.
Power & Industrial:
Supercritical CO₂ transport.
Nuclear plant auxiliary piping (non-radioactive sections).
3. Technical Requirements
| Property | Requirement | Test Standard (ASTM) |
|---|---|---|
| Hydrostatic Test | 1.5x design pressure (22,500 psi) | A671 Section 12 |
| Charpy Impact | ≥20 ft-lb (27 J) at -50°F (-45°C) | A673 (Group 3) |
| NDT | 100% automated ultrasonic + radiography | E213 / E1032 |
4. Manufacturing & Certification
Process:
Precision SAW welding with real-time AI defect detection.
Mandatory PWHT + quench & temper for thickness >2".
Certification:
Complies with ASME B31.3 Class 1, API 5L PSL2, and ISO 3183 Annex H.
NACE MR0175 Level III for sour service (mandatory).
5. Operational Limits & Compliance
Temperature Range: -50°F to 750°F (-45°C to 399°C).
Max Pressure: ≤15,000 psi (1,034 bar).
Standards:
ISO 3183:2026 (High-pressure pipelines).
ASME B31.3 Chapter IX (High-pressure fluid service).
