Metinox Overseas is a premier manufacturer, stockist, and global exporter of high-grade ASTM A234 WPB pipe fittings, delivering engineered buttweld components to processing plants across 80+ countries. Manufactured in strict accordance with ASTM A234 and ASME SA234 standards, our carbon steel fittings ensure long-term structural integrity and performance in high-pressure oil, gas, refining, and power generation pipelines.
With over 30 years of experience in the industry, we provide a full range of 1/2" to 48" NB elbows (45°, 90°, 180°), tees, reducers, caps, crosses, and bends, all of which are made from WPB carbon steel fittings. All fittings are tested to rigorous standards such as radiography, ultrasonic, and hydrostatic testing with full material traceability and mill test certificates to EN 10204 3.1/3.2.
Our manufacturing unit is ISO 9001:2015 certified, ensuring quality and timely delivery. Metinox Overseas provides standard and custom sizes, technical support from inquiry till installation, and cost-effective solutions.
Request an instant ASTM A234 Grade WPB pipe fitting price quote.Table of Contents
- What Are ASTM A234 WPB Pipe Fittings?
- Types of A234 WPB Carbon Steel Fittings
- ASTM A234 WPB Specifications & Standards
- Chemical Composition & Element Limits
- Mechanical Performance Ratings
- ASME B16.9 Dimensional Reference Tables
- Quality Testing & Manufacturing Protocol
- Applications of ASTM A234 WPB Pipe Fittings
- Heat Treatment Requirements
- Pressure Rating Tables
- Grade Comparison
- Price Guide
- Why Choose Metinox Overseas
- FAQs
What Are ASTM A234 WPB Pipe Fittings?
ASTM A234 WPB pipe fittings are wrought carbon steel butt weld fittings designed for moderate and high-temperature service in piping systems operating under pressure. The designation "WPB" stands for Wrought Product, Grade B, which is the most commonly specified grade for carbon steel fittings in industrial applications.
These fittings are manufactured to ASTM A234/ASME SA234 specifications and are heat-treated, normalized, or tempered to achieve optimal mechanical properties. The material composition includes killed steel with controlled carbon, manganese, phosphorus, sulfur, and silicon content to ensure excellent weldability and corrosion resistance.
Key Features:
- Temperature Range: -29°C to 427°C (-20°F to 800°F)
- Pressure Class: 150#, 300#, 600#, 900#, 1500#, 2500#
- Manufacturing: Seamless (SMLS) and Electric Fusion Welded (EFW)
- End Finish: Plain End (PE), Beveled End (BE)
- Standards: ASTM A234, ASME SA234, ASME B16.9, ASME B16.28, MSS-SP-43, MSS-SP-75
Types of A234 WPB Carbon Steel Fittings
We manufacture a complete selection of seamless and welded carbon steel buttweld components, including:
- ASTM A234 WPB Elbows: Available in 45°, 90°, and 180° configurations in both Long Radius (LR) and Short Radius (SR) variations for directing flow path transitions.
- ASTM A234 WPB Tees: Equal Tees and Reducing Tees engineered to manage fluid distribution networks safely.
- ASTM A234 WPB Reducers: Concentric Reducers and Eccentric Reducers designed to maintain pipeline velocity profiles during size adaptations.
- ASTM A234 WPB Caps & Crosses: End Caps for secure terminal sealing and 4-way Crosses for multi-directional processing lines.
- ASTM A234 WPB Stub Ends: Lap joint stub ends for flange connections.
- ASTM A234 WPB Bends: Custom radius bends for specialized routing requirements.
ASTM A234 WPB Fittings Specification & Standards
| Specification | Details |
|---|---|
| Standard | ASTM A234 / ASME SA234 |
| Grade | WPB (Wrought Product, Grade B) |
| Type | Seamless (SMLS) / Electric Fusion Welded (EFW) |
| Manufacturing | Hot Forming, Cold Forming, Machining |
| Dimensional Standards | ASME B16.9, ASME B16.28, MSS-SP-43, MSS-SP-75, MSS-SP-95, MSS-SP-97 |
| Size Range | 1/2" to 48" NB (DN 15 to DN 1200) |
| Wall Thickness | Sch 5 to Sch 160, STD, XS, XXS |
| Pressure Rating | Class 150, 300, 600, 900, 1500, 2500 (ANSI/ASME B16.5) |
| End Connection | Buttweld (BW), Beveled End (BE) |
| Heat Treatment | Normalized, Normalized & Tempered, Stress Relieved |
| Testing | Radiography, Ultrasonic, Hydrostatic, PMI, Dimensional |
| Certificates | EN 10204 3.1, EN 10204 3.2, NACE MR0175, NACE MR0103 |
ASTM A234 WPB Equivalent Material
| Material Category | Grade A Equivalent Specification | Grade B Equivalent Specification | Grade C Equivalent Specification |
|---|---|---|---|
| Carbon Steel Pipes | ASTM A106 Grade A | ASTM A106 Grade B | ASTM A106 Grade C |
| Carbon Steel Flanges | ASTM A105 | ASTM A105 | ASTM A105 |
| Cast Steel Valves | ASTM A216 Grade WCB | ASTM A216 Grade WCB | ASTM A216 Grade WCB |
| Butt Weld Pipe Fittings | ASTM A234 Grade WPA | ASTM A234 Grade WPB | ASTM A234 Grade WPC |
| Alloy Steel Bolting | ASTM A193 Grade B7 | ASTM A193 Grade B7 | ASTM A193 Grade B7 |
| Heavy Hex Nuts | ASTM A194 Grade 2H | ASTM A194 Grade 2H | ASTM A194 Grade 2H |
ASTM A234 WPB Chemical Composition (%)
| Grade | C max | Mn | P max | S max | Si min | Cr max | Mo max | Ni max |
|---|---|---|---|---|---|---|---|---|
| WPB | 0.30 | 0.29-1.06 | 0.050 | 0.058 | 0.10 | 0.40 | 0.15 | 0.40 |
Note:
- Carbon content maximum is 0.30% for pipe or plate material
- For each reduction of 0.01% below the specified carbon maximum, an increase of 0.06% manganese above the specified maximum is permitted (up to 1.35% max)
- Silicon minimum is 0.10%
- The sum of Cu, Ni, Cr, and Mo shall not exceed 1.00%
A234 WPB Carbon Steel Fittings Mechanical Properties
| Property | Requirement |
|---|---|
| Tensile Strength | 60,000 psi minimum (415 MPa) |
| Yield Strength | 35,000 psi minimum (240 MPa) |
| Elongation in 2 inches (Longitudinal) | 30% minimum |
| Elongation in 50mm (Transverse) | 22% minimum |
| Hardness | 197 HB max (Brinell Hardness) |
Tensile Requirements by Grade:
| Grade | Tensile Strength ksi [MPa] | Yield Strength min ksi [MPa] |
|---|---|---|
| WPB | 60-95 [415-655] | 35 [240] |
| WPC | 70-95 [485-655] | 40 [275] |
| WP1 | 55-80 [380-550] | 30 [205] |
| WP11 CL1, WP22 CL1, WP5 CL1, WP9 CL1 | 60-85 [415-585] | 30 [205] |
| WP11 CL3, WP22 CL3, WP5 CL3, WP9 CL3 | 75-100 [520-690] | 45 [310] |
| WP91 | 85-110 [585-760] | 60 [415] |
ASTM A234 WPB Pipe Fittings Dimensions (ASME B16.9)
90 Degree Long Radius Elbow Dimensions:
| NPS (inch) | Outside Diameter (mm) | Center to End A (mm) | Back to Face K (mm) |
|---|---|---|---|
| 1/2" | 21.3 | 38 | 25 |
| 3/4" | 26.7 | 38 | 29 |
| 1" | 33.4 | 38 | 33 |
| 1-1/4" | 42.2 | 48 | 41 |
| 1-1/2" | 48.3 | 57 | 48 |
| 2" | 60.3 | 76 | 61 |
| 2-1/2" | 73.0 | 95 | 76 |
| 3" | 88.9 | 114 | 92 |
| 4" | 114.3 | 152 | 122 |
| 5" | 141.3 | 190 | 152 |
| 6" | 168.3 | 229 | 178 |
| 8" | 219.1 | 305 | 229 |
| 10" | 273.1 | 381 | 279 |
| 12" | 323.9 | 457 | 305 |
Equal Tee Dimensions:
| NPS (inch) | Outside Diameter (mm) | Center to End C (mm) | Center to End M (mm) |
|---|---|---|---|
| 1/2" | 21.3 | 25 | 25 |
| 1" | 33.4 | 38 | 38 |
| 2" | 60.3 | 64 | 64 |
| 3" | 88.9 | 95 | 95 |
| 4" | 114.3 | 121 | 121 |
| 6" | 168.3 | 184 | 184 |
| 8" | 219.1 | 235 | 235 |
| 10" | 273.1 | 292 | 292 |
| 12" | 323.9 | 343 | 343 |
Concentric Reducer Dimensions:
| NPS (inch) | Large End OD (mm) | Small End OD (mm) | Length H (mm) |
|---|---|---|---|
| 2" x 1" | 60.3 | 33.4 | 76 |
| 3" x 2" | 88.9 | 60.3 | 89 |
| 4" x 3" | 114.3 | 88.9 | 102 |
| 6" x 4" | 168.3 | 114.3 | 127 |
| 8" x 6" | 219.1 | 168.3 | 152 |
| 10" x 8" | 273.1 | 219.1 | 178 |
| 12" x 10" | 323.9 | 273.1 | 203 |
Weight Chart - ASTM A234 WPB Elbows (Schedule 40):
| Size (NPS) | 90° LR Elbow (kg) | 45° LR Elbow (kg) | Equal Tee (kg) |
|---|---|---|---|
| 1/2" | 0.05 | 0.03 | 0.07 |
| 1" | 0.15 | 0.10 | 0.20 |
| 2" | 0.80 | 0.55 | 1.50 |
| 3" | 3.00 | 2.00 | 4.00 |
| 4" | 5.50 | 3.60 | 7.00 |
| 6" | 14.00 | 9.00 | 18.00 |
| 8" | 28.00 | 18.00 | 35.00 |
| 10" | 52.00 | 34.00 | 64.00 |
| 12" | 80.00 | 52.00 | 98.00 |
For complete weight charts in other schedules (Sch 80, Sch 160, XS, XXS), please contact our technical team.
ASME B16.25 Weld End Preparation
All ASTM A234 WPB buttweld fittings are supplied with standard beveled ends conforming to ASME B16.25 requirements:
- Bevel Angle: 37.5° ± 2.5° (standard 30° included angle)
- Root Face: 1.6mm (1/16") ± 0.8mm
- End Preparation: Machine beveled for optimal weld penetration
- Surface Finish: Smooth, free from burrs and sharp edges
These specifications ensure proper joint preparation for field welding and maintain structural integrity across the weld interface.
Manufacturing Process for ASTM A234 WPB Fittings
Metinox Overseas follows stringent manufacturing protocols to produce premium A234 WPB carbon steel pipe fittings:
Step 1: Raw Material Selection
- Source high-grade carbon steel pipes/plates from certified mills
- Verify material certificates and chemical composition
- Perform incoming inspection and PMI testing
Step 2: Forming Operations
- Hot Forming: Induction bending at 900-1100°C for larger fittings
- Cold Forming: Pressing and rolling for smaller diameter fittings
- Machining: CNC machining for reducers, caps, and specialty fittings
Step 3: Heat Treatment
- Normalizing: 900°C followed by air cooling (removes internal stresses)
- Stress Relieving: 600-650°C for welded fittings
- Tempering: (if required for enhanced toughness)
Step 4: Surface Finishing
- Shot blasting to remove scale and oxides
- Pickling (if required for cleaner surface)
- Anti-rust oil coating or black/red paint
Step 5: Quality Testing
- Dimensional Inspection: Caliper, template gauge, profile projector
- Visual Inspection: Surface defects, cracks, laminations
- Radiography Testing (RT): As per ASTM E94, ASTM E1742
- Ultrasonic Testing (UT): As per ASTM A388, ASTM E213
- Hydrostatic Testing: Pressure test at 1.5x design pressure
- Positive Material Identification (PMI): Verify grade and chemistry
- Hardness Testing: Brinell or Rockwell hardness test
Step 6: Marking & Packaging
- Permanent marking: Grade, size, heat number, manufacturer logo
- Protective caps on ends
- Wooden crates or pallets for export
- Complete documentation: MTC 3.1, test reports, traceability charts
B2B Procurement Quality Assurance Verification Protocols
Every carbon steel component shipped from Metinox Overseas undergoes systematic testing and verification to ensure performance in volatile processing environments. Our quality processes feature standard testing options:
- Non-Destructive Testing (NDT): 100% Hydrostatic verification tests paired with standard Radiographic Testing (RT) on all welded configurations.
- Volumetric Inspection: Ultrasonic Testing (UT) to detect subsurface forging defects per ASTM A388 parameters.
- Traceability and Certifications: Full compliance documentation, providing certified EN 10204 3.1 Mill Test Reports (MTRs) and supporting IBR (Indian Boiler Regulations) certificates for high-pressure installations.
Certifications:
- ISO 9001:2015 Quality Management System
- ISO 14001:2015 Environmental Management
- NACE MR0175/ISO 15156 (for sour service)
- PED 2014/68/EU (European Pressure Equipment Directive)
- IBR (Indian Boiler Regulation)
Applications of ASTM A234 WPB Pipe Fittings
ASTM A234 WPB carbon steel fittings are extensively used in moderate and high-temperature piping systems across multiple industries:
1. Oil & Gas Industry
- Crude oil pipelines
- Natural gas transmission lines
- Offshore platforms
- Refineries and petrochemical plants
- LPG storage and distribution
2. Power Generation
- Thermal power plants (boiler feed lines)
- Steam distribution systems
- Cooling water circuits
- Condensate return lines
3. Petrochemical & Chemical Processing
- Process piping in chemical reactors
- Catalyst recovery systems
- Solvent recovery lines
- Acid and alkali handling (with proper coating)
4. Engineering & Construction
- HVAC systems in commercial buildings
- Water treatment plants
- Desalination facilities
- Mining and mineral processing
5. Food & Beverage
- Steam sterilization lines
- Hot water distribution
- CIP (Clean-in-Place) systems
6. Pharmaceutical Manufacturing
- Process utilities (steam, condensate)
- Clean steam generation
- Waste heat recovery
7. Pulp & Paper Industry
- Black liquor piping
- Steam blow systems
- Chemical recovery boilers
NACE Sour Service Material Requirements
For applications in sour service environments containing H₂S, ASTM A234 WPB fittings must comply with NACE MR0175/ISO 15156 specifications:
- Maximum Hardness: 22 HRC (Rockwell C Scale) or 237 HBW (Brinell)
- Heat Treatment: Mandatory stress relieving for welded configurations
- Material Verification: PMI testing and hardness surveys required
- Documentation: NACE compliance certificates with full traceability
These requirements ensure structural resistance to sulfide stress cracking (SSC) in corrosive oil and gas production systems.
Why Choose A234 WPB Fittings?
- Cost-effective solution for moderate service
- Excellent weldability without preheating
- Wide availability and standardization
- Compatible with carbon steel pipes per ASTM A106, A53, API 5L
- Proven performance in temperatures up to 427°C
Heat Treatment Requirements for A234 WPB Fittings
As per ASTM A234, all WPB carbon steel pipe fittings must undergo appropriate heat treatment to achieve specified mechanical properties:
Normalizing:
- Temperature: 900°C (1652°F) minimum
- Holding time: Based on wall thickness
- Cooling: Air cooling to room temperature
- Purpose: Refines grain structure, improves toughness
Stress Relieving (for welded fittings):
- Temperature: 600-650°C (1112-1202°F)
- Purpose: Reduces residual stresses from welding
Pressure Rating for ASTM A234 WPB Fittings (ASME B16.9)
| Temperature (°C) | Temperature (°F) | Pressure Class 150 | Pressure Class 300 | Pressure Class 600 |
|---|---|---|---|---|
| -29 to 38 | -20 to 100 | 2000 psi | 5000 psi | 10,000 psi |
| 93 | 200 | 1785 psi | 4460 psi | 8925 psi |
| 177 | 350 | 1150 psi | 2875 psi | 5750 psi |
| 260 | 500 | 725 psi | 1815 psi | 3625 psi |
| 343 | 650 | 510 psi | 1270 psi | 2540 psi |
| 427 | 800 | 385 psi | 960 psi | 1920 psi |
Pressure ratings decrease with temperature increase due to reduced material strength at elevated temperatures.
ASTM A234 WPB vs WPC vs WP11 - Grade Comparison
| Parameter | ASTM A234 WPB | ASTM A234 WPC | ASTM A234 WP11 |
|---|---|---|---|
| Material Type | Carbon Steel | Carbon Steel | Alloy Steel (Cr-Mo) |
| Carbon (%) | 0.30 max | 0.35 max | 0.05-0.20 |
| Chromium (%) | 0.40 max | 0.40 max | 1.00-1.50 |
| Molybdenum (%) | 0.15 max | 0.15 max | 0.44-0.65 |
| Tensile Strength | 60-95 ksi | 70-95 ksi | 60-85 ksi |
| Yield Strength | 35 ksi min | 40 ksi min | 30 ksi min |
| Temperature Range | -29°C to 427°C | -29°C to 427°C | Up to 593°C |
| Applications | General moderate temp service | Higher strength applications | High-temperature piping |
| Cost | Most economical | Moderate | Higher cost |
| Weldability | Excellent | Good | Requires preheat/PWHT |
ASTM A234 WPB Pipe Fittings Price
| Product Type | Approx Price Range |
|---|---|
| ASTM A234 WPB Elbow | $1.50 – $45 Per Piece |
| ASTM A234 WPB Tee | $2 – $60 Per Piece |
| ASTM A234 WPB Reducer | $3 – $75 Per Piece |
| ASTM A234 WPB End Cap | $1 – $40 Per Piece |
| ASTM A234 WPB Stub End | $4 – $85 Per Piece |
| ASTM A234 WPB Bend | $10 – $150 Per Piece |
Note: Prices vary depending on size, schedule, wall thickness, manufacturing type (seamless/welded), and quantity requirements.
ASTM A234 WPB Pipe Fittings Chart
| Nominal Pipe Size | Outside Diameter | Schedule | Wall Thickness |
|---|---|---|---|
| 1/2" | 21.3 mm | SCH 40 | 2.77 mm |
| 3/4" | 26.7 mm | SCH 40 | 2.87 mm |
| 1" | 33.4 mm | SCH 40 | 3.38 mm |
| 2" | 60.3 mm | SCH 40 | 3.91 mm |
| 4" | 114.3 mm | SCH 40 | 6.02 mm |
| 6" | 168.3 mm | SCH 40 | 7.11 mm |
| 8" | 219.1 mm | SCH 40 | 8.18 mm |
| 10" | 273.0 mm | SCH 40 | 9.27 mm |
| 12" | 323.9 mm | SCH 40 | 10.31 mm |
Why Choose Metinox Overseas for ASTM A234 WPB Fittings?
Product Advantages:
- Premium Quality: 100% Mill Test Certified with full traceability
- Wide Inventory: Extensive stock of all sizes and schedules
- Fast Delivery: Same-day dispatch for stock items
- Competitive Pricing: Direct manufacturer prices without middlemen
- Custom Solutions: Tailored dimensions and specifications
- Global Standards: ASTM, ASME, DIN, JIS, EN compliant
Company Advantages:
- 30+ Years Experience: Three decades in metal manufacturing
- Export to 80+ Countries: Worldwide shipping with reliable logistics
- ISO 9001:2015 Certified: Quality management system
- In-house Testing Lab: Advanced NDT and destructive testing facilities
- Technical Support: Expert guidance from inquiry to installation
- Safe Packaging: Protective wooden crates for damage-free delivery
Value-Added Services:
- Pre-shipment inspection by third-party agencies (SGS, TUV, BV)
- Material selection consultation
- Custom cutting and beveling
- Urgent/AOG (Aircraft on Ground) orders
- Documentation support for customs clearance
FAQs - ASTM A234 WPB Pipe Fittings
ASTM A234 WPB and WPC are both wrought carbon steel fitting grades, but WPC contains a higher allowable carbon limit (0.35% max versus 0.30% max), providing greater tensile and yield strength. WPB remains the industrial standard for standard pressure lines, while WPC is specified for higher load tolerances. Both have the same temperature range (-29°C to 427°C).
Yes, they are essentially identical. ASME SA234 is the ASME (American Society of Mechanical Engineers) adoption of the ASTM A234 specification. Both standards have the same chemical composition, mechanical properties, and testing requirements. The terms are used interchangeably in the industry.
WPB stands for "Wrought Product, Grade B." It indicates that the fitting is made from wrought carbon steel (not cast) and is Grade B, which is the standard grade for moderate temperature service.
The maximum recommended service temperature for ASTM A234 WPB fittings is 427°C (800°F). For higher temperatures, alloy steel grades like WP11, WP22, or WP91 should be used.
Yes, all A234 WPB fittings must be normalized (heated to 900°C and air cooled) as per ASTM A234 specifications. Welded fittings also require stress relieving at 600-650°C to remove welding stresses.
Seamless fittings are made from seamless pipes through hot or cold forming and are preferred for high-pressure applications. Welded fittings are made from welded pipes and are more economical. Both types meet ASTM A234 specifications and have the same chemical composition and mechanical properties.
Although ASTM A234 WPB fittings can be connected to stainless steel pipes, direct contact may lead to galvanic corrosion. To minimize corrosion risk, dielectric unions, insulation kits, or protective coatings are recommended.
Get Your ASTM A234 WPB Pipe Fittings Quote Today
Premium Quality. Competitive Prices. Worldwide Delivery.
Metinox Overseas is your trusted partner for ASTM A234 WPB carbon steel pipe fittings in India. Whether you need standard stock items or custom-engineered solutions, our team is ready to assist you.
Call Us: +91 22-67437598 | +91 22-40213914 (24/7 Support)
Email: sales@metinoxoverseas.com
Get Instant Quote: Request a Quotation
Why Delay? Order Now and Experience:
- ✓ Same-Day Dispatch on Stock Items
- ✓ 100% Quality Guaranteed with MTC
- ✓ ISO 9001:2015 Certified Manufacturer
- ✓ Competitive Factory Prices
- ✓ Worldwide Shipping to 80+ Countries
Enquire Now
Get pricing within 24 hours!
