Industrial Pipe Tees for Branch Connection in High-Pressure Piping Systems
Industrial piping systems need strong branch connections to handle internal pressure and temperature changes without failing at the joint. Our industrial pipe tees are made using hydraulic extrusion and hot forming methods. This pushes the branch outlet out from the main pipe while keeping the metal grain continuous through the intersection. Available in equal and reducing types across butt-weld, socket-weld, and threaded designs, these fittings connect directly into ASME and DIN piping networks for oil and gas, chemical plants, and power generation facilities.
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![ASME Tee]()
ASME TeeThe HAIHAO brand ASME B16.9 butt-welding fittings series is designed and manufactured in strict accordance with the ASME B16.9-2024 standard, covering various structural types including equal...
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![Steel Tee]()
Steel TeeThe HAIHAO steel tee is a pipe fitting designed and manufactured in accordance with ASME B16.9, GOST 17376, and DIN2615 standards, with a size range of 1/2" to 48" (DN15–DN1200). Wall thickness...
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![Butt Weld Tee]()
Butt Weld TeeA butt weld tee is available from NPS 1/2 to NPS 48 across multiple wall-thickness series.
Its weld ends allow the branch fitting to join directly into a fabricated piping system. -
![Stainless Steel Reducing Tee]()
Stainless Steel Reducing TeeA stainless steel reducing tee is available in GOST and ASME size systems, with five wall-thickness series.
Its reduced outlet connects a smaller branch to a larger run within one fitting. -
![Carbon Steel Tee]()
Carbon Steel TeeHigh Strength, Strong Pressure-Bearing Capacity
Excellent Weldability, Easy to Install
High Cost-Effectiveness, Economical and Durable -
![High Pressure Tee]()
High Pressure TeeHigh Pressure Resistance, Safe and Reliable
Precision Formed, Leak-Free
Corrosion Resistant, Long Service Life -
![GOST Standard Tee]()
GOST Standard TeeThe GOST 17376 tee is a butt-welding pipe fitting designed for branching from main pipelines in industrial systems.Manufactured in accordance with the Russian state standard GOST 17376, these tees...
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![Din Tee]()
Din TeeBW Butt-Weld, Material carbon steel / stainless steel / alloy steel, Wall thickness 3-40mm.
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![Stainless Steel Tee]()
Stainless Steel TeeHAIHAO brand stainless steel tees are manufactured in accordance with ASTM, GOST, and DIN standards, covering various types such as equal, reducing, 45°, and Y-type designs. With excellent...
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![Alloy Steel Tee]()
Alloy Steel TeeMaterial: Core material made of A234 WP91 alloy steel
Structure: Integral hot pressing/forging, smooth flow channels, no stress concentration points
Product Types
Equal Tees:
Run and branch connections share the same pipe size, keeping flow capacity uniform across the main line and branch line.
Reducing Tees:
Branch outlet features a smaller diameter than the run pipe, combining flow division with size transition in header piping layouts.
Lateral Tees:
Branch outlet is angled at 45 degrees or custom angles to reduce flow turbulence in high-velocity slurry or gas lines.
Threaded and Socket-Weld Tees:
Forged branch fittings built for smaller utility lines, instrument taps, and low-pressure auxiliary piping.
Materials & Standards
Stainless Steel: ASTM A403 WP304/304L, WP316/316L, WP321, WP310S. Resists rust and corrosion in chemical and pharmaceutical fluid systems.
Carbon Steel: ASTM A234 WPB, WPC; ASTM A420 WPL6 for cold temperatures down to -46°C. Available in normalized and stress-relieved conditions.
Alloy Steel & Special Alloys: ASTM A234 WP11, WP22, WP91; Duplex Stainless Steel UNS S31803 and S32750 for severe chemical and offshore environments.
Dimensional Standards:
Butt-weld: ASME B16.9, MSS SP-43, ISO 3419, DIN 2615.
Forged, Threaded, and Socket-weld: ASME B16.11, BS 3799.
Wall Thickness Schedules: Sch 5S, Sch 10S, Sch 40, Sch 80, Sch 160, XXS.
Technical Specifications
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Technical Parameter |
Standard Specification |
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Size Range – Seamless Tees |
1/2 inch to 24 inch (DN15 to DN600) |
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Size Range – Welded Tees |
26 inch to 48 inch (DN650 to DN1200) |
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Wall Thickness Tolerance |
In accordance with ASME B16.9, with wall thickness at the branch crotch and run meeting or exceeding the nominal schedule requirements |
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End Preparation – Butt-Weld Tees |
Beveled ends according to ASME B16.25 |
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End Configuration – Forged Fittings |
Threaded or socket-weld configurations |
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Surface Finish – Stainless Steel |
Pickled and passivated |
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Surface Finish – Carbon & Alloy Steel |
Shot-blast cleaned with anti-rust black paint or clean protective oil coating |
Applications
Oil & Gas Pipelines:
Main transmission headers and compressor station branch lines handling natural gas and crude oil under high pressure.
Power Generation:
Refinery process piping networks routing corrosive acids, hydrocarbons, and chemical reagents.
Power Generation:
Boiler feedwater lines, main steam headers, and plant cooling water distribution systems.
Industrial Utilities:
High-pressure plant air lines, saturated steam headers, and industrial water distribution networks.
Manufacturing & QC
Forming Process: Hydraulic extrusion and hot forming done on specialized presses to extrude the branch outlet upward from the run pipe, maintaining metal density without excessive thinning at the crotch.
Heat Treatment: Solution annealing for stainless steel grades; normalizing, quenching, and tempering for alloy and carbon steel tees to relieve forming stresses.
Dimensional Inspection: 100 percent check of run length, branch height, inner and outer diameters, wall thickness, and squareness using laser tools and ultrasonic meters.
Non-Destructive Testing: Radiographic testing (RT) on welded seams, ultrasonic testing (UT) on thick walls, and positive material identification (PMI) spectrometer testing to check metal alloy grades.
Documentation: Material Test Reports (MTR) provided under EN 10204 3.1, detailing chemical composition, mechanical tensile properties, and heat numbers matched to each fitting.
Customization & OEM
Reducing Outlet Combinations:
Non-standard reducing ratios and custom run-to-branch size combinations built to exact customer drawings.
Special Beveling and Wall Thickness:
Heavy-wall branch schedules, custom root faces, and J-prep edge shapes made for specific welding procedures.
Third-Party Inspection:
Welcome customer-appointed inspection companies like SGS, BV, TUV, or DNV for factory checks before shipment.
Export Packaging: Fumigation-free wooden crates, sturdy plywood boxes, or steel-banded wooden pallets lined with plastic moisture protection.
Protection Caps: Plastic caps fitted on all weld ends, socket ports, and threads to stop damage and keep dirt out during transport.
Logistics Support: Container shipping (FCL and LCL) and air freight help with complete shipping documents, including commercial invoice, packing list, material test reports, certificate of origin, and bill of lading.
FAQ
Q: How do you prevent wall thinning at the branch crotch during tee production?
A: We control wall thinning by using precision hydraulic extrusion dies and optimizing the heating temperature and push speed of the run pipe. The starting wall thickness of the raw pipe blank is calculated so that the finished branch crotch meets or exceeds the minimum wall thickness required by ASME B16.9.
Q: Can you supply tees manufactured to NACE MR0175 for sour gas service?
A: Yes. For carbon and low-alloy steel tees used in sour oil and gas environments, we source steel with strictly controlled limits for sulfur, phosphorus, and carbon. We perform post-weld heat treatment and hardness tests (maximum 248 HV10) to comply with NACE MR0175 and ISO 15156 standards.
Q: What documents come with each shipment of pipe tees?
A: Every shipment includes a Material Test Report certified to EN 10204 3.1. The report lists chemical composition, tensile strength, yield strength, elongation, hardness values, heat treatment records, and non-destructive testing results matched to the heat number stamped on the fitting.
Q: What is the difference between an equal tee and a reducing tee?
A: An equal tee has branch and run connections of the exact same pipe size, keeping flow rates uniform across all three ports. A reducing tee features a branch outlet with a smaller diameter than the run pipe, allowing you to branch off a smaller secondary line from a main header without using a separate reducer fitting.
Q: Do you test all stainless steel and alloy tees for material grade?
A: Yes. We perform 100 percent PMI testing using X-ray fluorescence analyzers on all stainless steel grades like 304 and 316, and special alloys like Duplex and Inconel, to verify the exact metal composition before packing.
Q: What end preparations are available for butt-weld tees?
A: Standard butt-weld tees come with beveled ends following ASME B16.25, using a 37.5 degree angle and a 1.6 mm root face. We also machine custom J-prep edges, compound bevels, or square cuts based on your welding procedure specifications.
Q: What is your standard lead time for standard and custom pipe tees?
A: Stock items in common sizes like ASTM A234 WPB and ASTM A403 WP316 in schedule 40 and schedule 80 ship within 7 to 14 business days. Custom shapes, special alloy grades, or non-standard wall thicknesses take 25 to 40 days based on raw material availability and third-party inspection steps.
As one of the most professional pipe tee manufacturers and suppliers in China, we are able to meet the needs of the majority of our customers. Please rest assured to wholesale high quality pipe tee made in China here from our factory. For price consultation, contact us.
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