ASTM A403 WP304 WP304L Equal Tee
2. Standard: ASTM A403 / ASME SA403, standard specification for wrought austenitic stainless steel piping fittings
3. Process: High-pressure hydraulic bulging or precision cold extrusion, ensuring a seamless, single-piece branch structure
4. Size Range: Equal three-way tee configurations across all Nominal Pipe Sizes (NPS) from 1/2" up to 24"
5. Heat Treatment: Homogeneous solution tempering followed by rapid uniform cooling to optimize material core elasticity
6. Surface Finish: Uniform sandblasted satin look, smooth descaled acid-pickled matte, or chemically passivated clean profile
7. Application: Food and beverage processing lines, general chemical plumbing, municipal water supply, and drainage grids
8. Service Advantage: Large ready stock of standard sizes for immediate container loading, flexible small-batch custom production
9. Packaging: Each equal tee carefully individual-wrapped and securely packed into heavy-duty seaworthy wooden boxes
10. Key Advantage: Dual certification ensures standard structural strength while eliminating carbide precipitation risks during field welding
ASTM A403 WP304 WP304L Equal Tee – Dual-Certified Austenitic Stainless Steel Piping Fitting for High-Integrity Industrial Pipeline Systems
Hebei All Trust Steel Co., Ltd manufactures premium ASTM A403 WP304 WP304L Equal Tee fittings engineered for reliable multi-directional fluid distribution across demanding industrial environments. All equal tees are fully solution annealed, and 100% hydraulically tested. EN 10204 3.1 Mill Test Certificates and full heat number traceability. All Trust Steel yearly production capacity exceeds 15,000 tonnes, and inventory of more than 5,000 tonnes of rolling stock on hand, ready to be delivered immediately to worldwide destinations from key ports in China such as Shanghai, Ningbo and Tianjin.
Our dual certified grade offers the structural integrity of WP304 with the excellent weldability of WP304L, with ultra low carbon content below 0.03% to avoid intergranular carbide precipitation during field construction.
What Is an ASTM A403 WP304 WP304L Equal Tee?
This product is a T-shaped pipe fitting of wrought austenitic stainless steel intended for use in pressure piping systems where three-way flow distribution with equalisation is required. ASTM A403 is the standard specification for wrought austenitic stainless steel fittings. WP = Wrought pressure service.
This fitting provides three outputs of the same nominal pipe size (NPS) for equal distribution or combination of flow. Dual certification to both WP304 (normal 18-8 austenitic composition) and WP304L (extra-low carbon variation) assures the utmost in adaptability for welding-intensive applications.
WP304 with up to 0.08% carbon has very good mechanical strength. The WP304L reduces the carbon content to a maximum of 0.03% which avoids the precipitation of chromium carbides in the heat affected zones during welding operations. Standardised corrosion resistance, ductility at cryogenic temperatures to -196°C and full sanitary process compatibility are all to your facility’s advantage.
Technical Specifications and Manufacturing Standards
| Specification | Details |
|---|---|
| Standard | ASTM A403 / ASME SA403 / ASME B16.9 / EN 10253-4 |
| Product Type | Butt-Welding Equal Tee (Straight Three-Way Fitting) |
| Material Grade | WP304 / WP304L Dual Certified (UNS S30400 / UNS S30403) |
| Manufacturing Process | Hydraulic Bulging / Cold Extrusion / Precision CNC Machining |
| Size Range | 1/2" to 48" NPS (Equal Outlets) |
| Wall Thickness | SCH 5S / 10S / 40S / 80S / 160 / XXS |
| Heat Treatment | Solution Annealing + Rapid Water Quenching |
| Surface Finish | Pickled & Passivated / Shot Blasted / Polished |
| End Type | Beveled Ends (BE) per ASME B16.25 |
| NDT Testing | Ultrasonic (UT) / Penetrant (PT) / Radiographic (RT) |
| Mechanical Testing | Tensile / Hardness / Intergranular Corrosion (ASTM A262-E) |
| Quality Certificates | EN 10204 3.1 & 3.2 MTC / ISO 9001:2015 / PED |
| Third-Party Inspection | SGS / BV / TÜV / DNV / ABS Accepted |
| Packaging | Individual Bubble Sleeves / Plywood Cases / Export Wooden Crates |
Core Product Advantages
Material and Functional Superiority
This product provides balanced multi-directional pressure containment when splitting standard process fluid lines. You receive reliable structural load ratings and consistent performance across thermal cycling environments. The dual-certified composition ensures mechanical properties meet WP304 benchmarks while maintaining WP304L's enhanced welding characteristics.
Production Quality and Testing Rigor
Every fitting is fabricated under strict ASTM A403 and ASME B16.9 compliance protocols. Modern hydraulic bulging technology creates seamless, single-piece branch structures without compromising material integrity. Full solution annealing followed by rapid cooling releases internal thermal micro-stresses, optimizing core elasticity and corrosion resistance.
Our 100% hydraulic testing rate validates pressure performance before shipment. Advanced computerized die calibrators secure perfect 90-degree alignment across all three equal ports, ensuring trouble-free field installation.
Versatile Customization and Dimensional Flexibility
All Trust Steel supports extensive schedule adjustments matching your exact engineering blueprints. You can specify custom plain end facing or standard ANSI beveling preparations for efficient field butt-welding operations. Individual foam bag insulation protects surface finish during transportation.
We accommodate mixed shipments combining equal tees with reducers, elbows, and flanges to minimize your procurement complexity and freight costs.
Industrial Applications
Petrochemical and Oil & Gas Processing
Your refinery and processing plants depend on ASTM A403 WP304 WP304L Equal Tee fittings for utility line flow distribution of corrosive hydrocarbons. The material is resistant to stress corrosion cracking and it retains structural integrity throughout cycles of thermal expansion.
Food, Beverage & Pharmaceutical Systems
Sanitary Piping Systems need a smooth inside surface and 304L purity to avoid bacterial development. These equal tees will survive the most rigors of CIP (Clean-in-Place) sterilisation procedures, while maintaining the product purity criteria necessary for dairy processing, brewing and pharmaceutical production.
Municipal Water Supply & Treatment Infrastructure
This leads to improved pitting and crevice corrosion resistance in desalination plants and wastewater treatment plants when brine solutions and chemical additives are used. The material has no problems with high velocity pipe networks in chloride heavy environments.
Cryogenic Engineering & LNG Facilities
The austenitic structure preserves mechanical ductility and impact strength down to temperatures as low as -196°C. This ability to withstand high heat environments is critical to your Liquefied Natural Gas (LNG) production and storage facilities.
FAQ
Q：What metallurgical property prevents this product from experiencing intergranular failure?
A：The dual-certified extra-low carbon profile effectively suppresses harmful chromium carbide precipitation along thermal zones during field fabrication and branch connection joining. Carbon content below 0.03% ensures heat-affected zones maintain corrosion resistance identical to base metal.
Q：How does your factory achieve exceptional geometric uniformity required for this 3-way intersection fitting?
A：We utilize advanced hydraulic bulging mechanical forming and cold extrusion press technologies, employing computerized die calibrators to secure perfect 90-degree alignment across all equal ports. Dimensional tolerances meet ASME B16.9 requirements for seamless field assembly.
Q：What destructive quality verification benchmarks must this equal tee batch successfully pass at the mill?
A：Representative production coupons undergo severe mechanical flattening trials, cross-sectional branch area flare expansions, and precise Positive Material Identification (PMI) alloy validation. Tensile strength, hardness, and intergranular corrosion testing per ASTM A262 Practice E confirm material integrity.
Q：Can this universal equal tee series be customized with tailored schedule limits for custom pipe layouts?
A：Yes, we provide flexible thickness calibration matching all standard pipe schedules from light-wall SCH 10S to heavy-duty SCH 80S, with options for precision ANSI-standard beveled endings. Custom length cutting and laser hole drilling accommodate complex manifold configurations.
Q：What material documentation is provided to verify precise material traceability of this dual-certified grade?
A：Each shipment includes a fully transparent EN 10204 3.1 Mill Test Certificate (MTC) detailing exact chemical ladle heat numbers, grain size configurations, and physical load test values. PMI reports and third-party inspection certificates from SGS or TÜV are available upon request.
Q：What is the difference between WP304 and WP304L for an equal tee?
A：WP304 has a higher carbon limit (0.08%), whereas WP304L restricts carbon to 0.03%, making 304L better for heavy-gauge welding to avoid sensitization. Most modern fittings are dual-certified, meeting 304L chemical requirements and 304 mechanical properties simultaneously.
Q：Are these fittings seamless or welded?
A：Both options are available. Seamless fittings carry "WP-S" designation, fabricated from solid pipe or bar stock. Welded versions marked "WP-W" undergo radiographic testing, while "WP-WX" indicates 100% X-ray examination of all longitudinal welds.
Contact Us
Secure your high-integrity piping systems with proven expertise from Hebei All Trust Steel with the ASTM A403 WP304 WP304L Equal Tee. Contact our engineering team at info@hballtrust.com for technical specifications and rapid quotation.
