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ASTM A53 API 5L Round Black Seamless Carbon Steel Pipe and Tube
pipe
Asia Metal supplies premium-grade seamless carbon steel pipes and tubes conforming to ASTM A53 and API 5L standards, featuring a protective black oxide (mill scale) finish for industrial durability. Engineered for high-pressure fluid transmission, structural support, oil & gas pipelines, mechanical applications, and fire protection systems, our seamless pipes offer superior strength, uniform wall thickness, and zero-weld-seam integrity — eliminating potential failure points under stress or corrosion. Ideal for demanding environments where reliability is non-negotiable. We support full customization in dimensions, end finishes, testing protocols, and packaging to meet your exact project requirements.
| Parameter | Standard Range | Customizable Options |
|---|---|---|
| Standards | ASTM A53 Gr. A/B, API 5L Gr. B, X42, X52, X60 | Also compliant with ASME SA53, EN 10216-1, GB/T 8163 |
| Outer Diameter (OD) | 1/8" to 24" (10.3mm – 610mm) | Yes — Tolerance per ASTM A530 or tighter ±0.3% |
| Wall Thickness | SCH 10 to SCH 160, STD, XS, XXS | Yes — Custom mm/inch thickness with ±0.1mm precision |
| Steel Grade | A53 Gr. B, API 5L Gr. B (Carbon Steel) | Yes — Higher grades: X42, X56, X65, or customer alloy |
| Surface Finish | Black Oxide (Mill Scale), Bare Metal | Yes — Shot blasted, oiled, varnished, or custom coating |
| Length | 5m – 12m (Random or Fixed Length) | Yes — Cut-to-length ±5mm; max 18m single piece |
| End Preparation | Plain, Beveled (30°/37.5°), Threaded, Coupled | Yes — Grooved, flanged, socket weld, or special profiles |
| Delivery Time | 7–14 Days (Standard Sizes & Grades) | Custom orders: 10–25 days; Rush 5-day for stocked items |
| Certifications | ISO 9001, API 5L Monogram, SGS, BV, MTC (EN 10204 3.1), CE | Additional: PED, NACE MR0175, Hydrotest Reports, PMI |
| Property | ASTM A53 Grade B | API 5L Grade B | Test Standard |
|---|---|---|---|
| Tensile Strength | ≥415 MPa (60,000 psi) | ≥415 MPa (60,000 psi) | ASTM A370 |
| Yield Strength | ≥240 MPa (35,000 psi) | ≥245 MPa (35,500 psi) | ASTM A370 |
| Elongation (Longitudinal) | ≥20% | ≥21% | ASTM A370 |
| Hydrostatic Test Pressure | ≥2500 psi (based on schedule) | Calculated per API 5L formula | API 5L / ASTM A530 |
| Non-Destructive Testing | Optional UT or Eddy Current | Mandatory Ultrasonic or Radiographic | API 5L / ASTM E213 / E94 |
| Flattening & Bend Test | Pass (No crack at 2/3 flattening) | Pass (Per API 5L requirements) | ASTM A450 / API 5L |
A: Seamless pipes have no welded seam, eliminating the weakest point in the structure. This makes them ideal for high-pressure, high-temperature, or critical safety applications like oil & gas transmission, boiler tubes, or hydraulic systems where failure is not an option.
A: The black oxide (mill scale) offers minimal short-term protection during storage/transport. For long-term corrosion resistance — especially in buried, marine, or humid environments — we recommend additional coating: epoxy, FBE, 3LPE, or hot-dip galvanizing. We offer pre-coated options.
A: Yes. Every pipe is marked with heat number, size, standard, and manufacturer ID. We provide EN 10204 3.1/3.2 Mill Test Certificates including chemical, mechanical, and NDT reports. Third-party inspection by SGS, BV, TÜV, or LR can be arranged at our mill with zero delay to your schedule.
A: Absolutely. ASTM A53 Grade B seamless black pipes are widely approved for fire protection systems (NFPA 13 compliant). We can supply pre-threaded, pre-grooved, or plain ends with hydrostatic test certification for immediate installation.
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