Precision-manufactured ASTM A234 WPB buttweld fittings, forged pressure flanges, and high-tensile bolting configurations fully certified to ASME, EN, and CE industrial safety directives.
Seamless and welded wrought carbon steel fittings certified to ASTM A234 Grade WPB represent the backbone of medium-to-high pressure industrial piping systems globally. When installed in demanding maritime, petrochemical, and civil infrastructure projects throughout Sri Lanka, selecting the appropriate manufacturing baseline is paramount to safeguarding system longevity. The designation "W" represents weldable grade, "P" signifies pressure pipe execution, and "B" indicates the material's specific yield and tensile threshold parameters.
Rajtilak Metal brings over three decades of ISO 9001, Indian Boiler Regulations (IBR), and Engineers India Limited (EIL) accredited metallurgical craftsmanship directly to Sri Lankan mechanical engineers and EPC procurement leads. In high-humidity tropical microclimates such as Colombo Harbor and the coastal energy nodes of Hambantota, standard generic carbon steel fittings rapidly develop localized pitting and galvanic failure when internal stress concentrations remain unchecked. Every single buttweld elbow, concentric reducer, eccentric reducer, tee, and pipe cap produced in our advanced forging bays undergoes controlled hot forming and full normalizing heat treatment to refine the grain structure, relieve mechanical strain, and maintain superior notch toughness.
| Mechanical & Chemical Criteria | ASTM A234 Grade WPB Standard Value | ASME B16.9 Tolerance Benchmark | Rajtilak Manufacturing Delivery State |
|---|---|---|---|
| Tensile Strength (min) | 60,000 psi [415 MPa] | Full compliance according to ASTM A234 | 485 – 540 MPa (Superior Safety Margin) |
| Yield Strength (min) | 35,000 psi [240 MPa] | Certified per heat melt chemistry | 275 – 330 MPa Normalized Grain |
| Carbon Equivalent (CE) | Max 0.50% via CE = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15 | Critical for field weldability | Strictly held ≤ 0.42% for Sour / Marine Service |
| Wall Thickness & Bores | SCH 10 through SCH 160 / XXS | ASME B16.9 / MSS SP-75 | 100% Ultrasonic Gauge Checked |
| Heat Treatment Cycle | Hot Formed > 1150°F [620°C] or Normalized | Mandatory for cold-worked items | Furnace Normalized at 900°C + Air Quenched |
Precision-matched pressure piping architectures engineered to withstand coastal humidity, brackish water interaction, and heavy operating cycles in Sri Lankan industrial corridors.
Extensively deployed across bunkering terminals, marine fluid distribution, and deepwater container berths. Heavy salt-spray exposure is mitigated by our hot-dip galvanizing options and black phosphated anti-rust primers on ASTM A234 WPB 90-degree long radius elbows.
Supplying the Sapugaskanda Refinery network and CPSTL petroleum storage pipelines in Kolonnawa. Our WPB butt-weld tees and reducers are manufactured with controlled carbon equivalents, eliminating the risk of hydrogen-induced cracking (HIC) during field welding.
Engineered for high-temperature steam lines, cooling circuits, and condensate extraction systems. ASME B16.9 Schedule 80 and Schedule 160 heavy-wall components provide structural rigidity against cyclical thermal fatigue and hydraulic shock loads.
Strategic shift towards high-integrity certified metallurgy, regional deep-sea energy transshipment, and municipal water purification resilience.
The expansion of the Southern Maritime corridor has triggered massive demand for Class 150 to Class 2500 high-pressure piping assemblies and rapid-delivery A234 WPB components for ship-to-shore liquid offloading.
National Water Supply & Drainage Board (NWSDB) initiatives demand rigorous internal lining and epoxy-coated WPB steel manifolds to resist tropical soil corrosion and high hydrostatic heads.
The historic restoration of upper and lower tank farms requires complete traceability with EN 10204 3.1 certification, high-strength butt-welded fittings, and ASTM A105 companion flanges to replace legacy colonial infrastructure.
In the Katunayake and Biyagama export processing zones, industrial boilers require dependable steam-rated fittings capable of running 24/7 cycles without micro-fissure propagation or joint weepage.
Government of India Recognized Export House delivering unparalleled quality, certified metallurgy, and custom heavy-forging engineering.
Every fitting is permanently hard-stamped with melt heat number, size, wall schedule, and ASTM specification. Accompanied by EN 10204 3.1 mill test certificates guaranteeing complete chemistry and mechanical batch compliance.
Approved by top-tier authorities including Engineers India Limited (EIL) and Indian Boiler Regulations (IBR). Our forging and forming facilities undergo continuous independent audits, ensuring 0% field failure rates.
Positioned conveniently at Mumbai Port, we offer direct shipping connections to Colombo and Hambantota, reducing lead times to under 5-7 sailing days for urgent industrial shutdowns, breakdowns, and project milestones.
Direct technical answers addressing customs clearances, corrosion prevention, and standard certifications for imports into Sri Lanka.
While Grade WPB is the standard general-purpose carbon steel fitting with 415 MPa minimum tensile strength, Grade WPC provides slightly higher tensile capacity (485 MPa) and carbon content. For most refinery and piping codes in Sri Lanka, WPB is specified due to its superior ductility, weldability, and resistance to thermal stress cracking.
Yes. Rajtilak Metal is an IBR-authorized manufacturer. We supply boiler piping components with mandatory Form III-C certification, ensuring seamless approval under Sri Lankan industrial inspectorates and insurance compliance.
Every shipment is treated with heavy-duty rust inhibitor oil, black bitumastic paint, or hot-dip galvanizing per ASTM A153. Fittings are packed in seaworthy, fumigated solid wooden crates lined with moisture-barrier polyethylene sheets.
Absolutely. We regularly host third-party inspection bodies including Bureau Veritas (BV), SGS, DNV, Lloyd's Register, and TÜV at our manufacturing facilities for visual, dimensional, ultrasonic, and hydrostatic validation prior to export.
