ASTM A106 Grade B Seamless Pipes: High-Temperature Carbon Steel Tubing for Process Industries.
Seamless Pipes (10–426mm OD, 1–100mm WT) with 415 MPa Tensile Strength.
Certified to ASTM A106 Grade B and ASME B36.10M, these pipes deliver 240 MPa yield strength for steam lines, refinery piping, and boiler systems operating up to 425°C (797°F). Available in 3–12m lengths (custom-cut) with plain, bevelled, or threaded ends, they achieve ±1% OD precision via hot-rolled manufacturing.
Key Features:
- Pressure Capacity: 10–55 MPa (1,450–7,975 psi)
- Temperature Range: -29°C to 425°C (-20°F to 797°F)
- Certifications: NACE MR0103, ISO 9001:2015, PED 2014/68/EU
Technical Specifications
Dimensional Tolerances
| Parameter | Tolerance | Standard |
|---|---|---|
| Outer Diameter | ±1% | ASTM A106 |
| Wall Thickness | +12.5%/-10% | ASME B36.10M |
| Straightness | ≤1.5mm/m | EN 10216-2 |
Mechanical Properties
| Yield Strength | Tensile Strength | Elongation | Hardness | Impact Energy (-30°C) |
|---|---|---|---|---|
| 240 MPa | 415 MPa | ≥25% | ≤79 HRB | ≥27 J (ASTM A370) |
Material Composition & Production
Chemical Analysis (ASTM A106 Gr. B)
| Element | C ≤ | Mn ≤ | P ≤ | S ≤ | Si ≤ |
|---|---|---|---|---|---|
| Content | 0.30% | 0.29–1.06% | 0.035% | 0.035% | 0.10% |
Manufacturing Process:
- Hot Rolling: Billets heated to 1,200°C (2,192°F) for seamless forming.
- Normalizing: 900°C (1,652°F) treatment to enhance grain structure.
- Testing: Hydrostatic pressure at 1.5×MAOP (ASME Sec II).
Applications & Advantages
- Refinery Piping:
- 323mm OD, 15mm WT: 25 MPa crude oil transfer (ASME B31.3).
- Power Plant Steam Lines:
- 168mm OD, 8mm WT: 540°C superheated steam (ASTM A106).
- Hydraulic Systems:
- 50mm OD, 5mm WT: 55 MPa fluid power transmission.
Competitive Edge:
- Cost Savings: 20% cheaper than ASTM A312 SS304 for non-corrosive steam.
- Weldability: Pre-heat to 150°C (302°F) for SMAW/GTAW joints.
Quality Assurance & Packaging
- Testing Protocols:
- Ultrasonic Testing: ASTM E213 for laminations ≥0.5mm.
- Hardness Mapping: 12-point Brinell test per batch.
- Surface Protection:
- VCI paper + black lacquer (ISO 8180).
- Export Packaging:
- Hexagonal bundles with steel straps (max 4 tons).
Packing And Delivery
