Reducing Butt Weld Tee

Our seamless reducing butt weld tee is hot extruded three-way pipe fitting with a smaller branch outlet for pipeline flow split of different diameters. Strictly manufactured following ASME B16.9 & Indian IS 1239 standards, all sizes maintain full nominal dimension without minus tolerance, widely used in petroleum, chemical, power and water treatment piping systems.

Our butt weld pipe fitting portfolio covers a full range of pipeline transition and closure components. For U-turn pipeline routing, check our 180 Degree Butt Weld Bend. When you need to seal off the pipe end permanently, our Butt Weld Pipe Cap provides reliable end closure for high-pressure butt-weld piping systems.

Overview Of Reducing Butt Weld Tee

Reducing Butt Weld Tee is an integral seamless hot extruded butt-weld pipe fitting, also known as unequal tee. Its straight run matches main pipe diameter, while the lateral branch adopts smaller size to realize shunt or confluence of different-diameter pipelines.

Integral seamless extrusion forming ensures uniform wall thickness and outstanding pressure bearing performance. Raw materials cover carbon steel A234 WPB and stainless steel A403 WP304 / WP316L. We strictly inspect OD, ID and wall thickness of every tee, guarantee zero minus tolerance without thin-wall cost cutting. Complete inch & metric size range, all custom reducing ratios available to match diverse pipeline designs.

Core Key Features Of Reducing Butt Weld Tee

One-piece seamless hot extrusion forming Uniform wall thickness, high structural strength, and excellent resistance to pressure and impact.
Reducing branch design Ideal for applications where the branch pipe diameter is smaller than the main pipe diameter.
Butt-weld connection Full penetration welding ensures a strong, leak-proof joint for heavy-duty industrial pipelines.
Available in carbon steel and stainless steelA234 WPB for high-temperature and high-pressure service; WP304 / WP316L for corrosion resistance.
Compliance with international standards Manufactured to ASME B16.9, ASTM A234, ASTM A403, and IS 1239.
Full size coverage From DN15 to DN1200 (1/2″ to 48″), with custom dimensions available on request.
Zero minus tolerance on key dimensions Strict control of outer diameter, inner diameter, and wall thickness for reliable pipeline matching.
Complete quality inspection Full dimensional check, ultrasonic testing (UT), and hydrostatic pressure test before shipment. MTC and material test certificates are provided.

Technical Specification


Item	Technical Parameter
Product Name	Reducing Butt Weld Tee / Unequal BW Tee
Connection Type	Butt Weld (BW)
Production Craft	Seamless Hot Extrusion Forming
Executive Standard	ASME B16.9, ASTM A234, ASTM A403, IS 1239
Main Materials	Carbon Steel A234 WPB; Stainless Steel A403 WP304 / WP316L
Size Range	DN15 ~ DN1200 / 1/2″ ~ 48″
Wall Schedule	Sch40, Sch80, Sch160, XXS, Custom wall thickness
Structure Feature	Straight run full size, reduced branch outlet
Dimensional Tolerance	Zero minus tolerance on OD, ID and wall thickness
Inspection Items	UT, Hydrostatic Test, Full Dimension Inspection
Surface Treatment	Black anti-rust paint / Sandblasting (Carbon Steel); Pickling & Passivation (Stainless Steel)

Applications

Our seamless reducing butt weld tees are widely applied in all heavy industrial pipeline systems:

Petroleum & natural gas transmission trunk pipelines
Chemical plant high-pressure process piping with variable flow branches
Thermal power station steam & condensate piping
Water supply, sewage and municipal wastewater treatment projects
Food & pharmaceutical stainless steel clean process pipelines
Indian IS 1239 standard construction & industrial pipeline projects
Offshore platform fluid conveying pipeline branch connections

Why Choose Our Reducing Butt Weld Tee

Direct factory manufacturer supply, large stock of regular sizes, competitive ex-work factory price
All tees produced to full standard dimensions with zero minus tolerance, never cut corners with thin walls
Support custom reducing ratio, wall thickness, length and surface treatment based on customer drawings
Complete full-process quality inspection, full set of test certificates for export customs clearance
Fast delivery within 7–15 working days for standard stock items
Standard export wooden case packaging, anti-rust and anti-collision protection for long-distance sea

FAQ

Q1: What is the difference between equal tee and reducing tee?

A: Equal butt weld tee has three ports of identical diameter for equal pipeline split; reducing tee features a smaller lateral branch outlet, used when branch pipeline diameter is less than main pipe.

Q2: Do your reducing butt weld tees have minus tolerance on wall thickness?

A: All our seamless pipe fittings are strictly manufactured to full nominal standard dimensions. We guarantee zero minus tolerance on outer diameter and wall thickness, we never adopt thinner raw materials to lower production costs.