The biggest difference between a flanged Y-type tee and an ordinary right-angle tee lies in the flow passage angle. The medium transitions more smoothly in the Y-type inclined flow passage, resulting in less turbulence and smaller local pressure drop, and the pipe wall scouring and pipeline vibration noise are also reduced accordingly. All three ports adopt an integrated flange structure, and on site they can be connected with bolts and sealing gaskets without welding, making disassembly, assembly, and maintenance convenient, and there is no hidden risk of weld seam leakage. The flanged Y-type tees we produce comply with standards such as GB/T12459, GB/T9113, HG/T21635, ASME B16.9, ANSI B16.5, etc., with pressure coverage from PN6 to PN100 and Class150 to Class1500, and materials covering carbon steel, stainless steel, alloy steel, and ductile iron. If you need non-standard angles, reducing ratios, or special sealing faces, welcome to contact us to confirm a customized solution.
Overview
A flanged Y-type tee is an oblique branch fitting with flanges on all three ends, and the flow channel angle is usually 120° or 135°, so it is also often called an oblique tee or a 135° branch tee. Its function is to achieve gentle splitting, merging and flow guiding in pipeline systems, replacing traditional 90° right-angle T-type tees. Because the Y-shaped flow channel transition is smoother, the turbulence, local pressure drop, pipe wall erosion and vibration noise during medium splitting and merging are relatively lower, and the flow channel has no dead corners and is not prone to scaling and slag blockage. All three ports use an integrated flange structure, and on-site installation only requires bolting and sealing gaskets for connection, with no welding required, convenient disassembly and maintenance, and no hidden risk of weld leakage. We provide multiple materials such as carbon steel, stainless steel, alloy steel and ductile iron, with pressure coverage from PN6~PN100 and Class150~Class1500, suitable for pipeline systems such as municipal water supply and drainage, HVAC, chemical industry, environmental protection, power plants and oil and gas transmission.
Key Features
First, the Y-shaped oblique flow channel makes the transition of medium splitting and merging more natural. Compared with right-angle T-type tees, it has lower flow resistance and smaller pressure drop loss, which helps reduce pipeline operating energy consumption. Second, the medium impact angle is gentle, which can reduce pipe wall erosion, pipeline vibration and operating noise, making it suitable for occasions with requirements for quietness and erosion prevention. Third, the three-end flange connection does not require on-site welding, is quick to install, and is also convenient for later disassembly and maintenance, with no hidden risk of weld leakage. Fourth, the flow channel has no dead corners and is not prone to scaling and slag blockage, making it suitable for pipelines with high flow velocity, impurity particles and long-term uninterrupted operation. Fifth, the coverage of materials and pressure ratings is wide, from carbon steel and stainless steel to alloy steel and ductile iron, from PN6 to PN100 and Class150 to Class1500, and can be selected according to project requirements. Sixth, we support customization of non-standard angles, reducing proportions, special sealing surfaces and surface treatments. You are welcome to contact us to confirm the specific solution.
Applications
Flanged Y-type tees are suitable for projects with requirements for pipeline stability, noise reduction and erosion prevention. In civil and municipal fields, they are often used for noise-reducing branches of community water supply and drainage, stable splitting in central air-conditioning HVAC, merging in municipal water conservancy and sewage discharge, splitting in urban rainwater collection and branches of low-noise water supply mains. In industrial fields, they are often used for gentle flow distribution in chemical process pipelines, merging and splitting of circulating water in power plants, sewage treatment and dust removal pipelines, environmental protection desulfurization and denitrification pipelines, clean and low-noise pipelines for food and pharmaceuticals, and gentle oil and gas transmission systems. They can adapt to normal temperature, medium-high temperature, medium-high pressure and slight corrosion working conditions, and are especially suitable for long-distance transmission, high flow velocity and pipelines containing particulate media. If your project involves special angles, special materials or special pressure ratings, you are welcome to contact us to confirm the selection.
Specifications
The conventional flow channel angles of flanged Y-type tees are 120° and 135°, and non-standard angles such as 90°, 100°, 110°, 145° and 150° can also be customized according to project requirements. The connection method is three-end flange connection, using bolts together with sealing gaskets for connection. Materials can be carbon steel, stainless steel, alloy steel and ductile iron. For special working conditions, 2205 duplex steel, Monel alloy, Hastelloy alloy or special wear-resistant alloy steel can be selected. Pressure ratings cover PN6~PN100 and Class150~Class1500. The products implement standards such as GB/T12459, GB/T9113, HG/T21635, ASME B16.9 and ANSI B16.5. Flange sealing surfaces can be customized in forms such as RF, MFM, TG and RJ, and surface treatment supports sandblasting, blackening, hot-dip galvanizing, pickling and passivation, and mirror polishing. Please contact us to confirm the specific diameter, wall thickness and reducing proportions.
Purchasing & Delivery
We adopt a flexible minimum order mechanism. Mainstream specifications in regular stock start from 1 piece, suitable for sample submission for inspection, sporadic maintenance, small-order replenishment and batch centralized procurement for projects. The warehouse regularly stocks conventional angles of 120° and 135°, conventional pressures of PN10/PN16/PN25, and popular specifications of carbon steel and 304 stainless steel, and ships within 24 hours after payment confirmation. For non-standard customized orders, the delivery time is determined according to the specific angle, material, pressure rating and quantity; please contact us to confirm. In terms of packaging, DN15-DN100 small pieces use independent bubble film plus hard cartons, DN125-DN400 medium diameters use multi-layer bubble film plus stretch film for reinforcement, and DN450 and above large diameters use solid wood pallets, steel strip locking and full wrapping with waterproof film. Flange sealing surfaces are pasted with thickened protective film, carbon steel pipe fittings are sprayed with anti-rust oil, and stainless steel pipe fittings are given anti-oxidation isolation. The outer packaging is marked with angle, specification, material, pressure, batch and standard information, and supports export fumigation wooden pallets, waterproof packaging and customized shipping marks.
Service & Support
We provide a 12-month warranty service for flanged Y-type tees. During the warranty period, for quality problems such as cracking, leakage, deformation, flow channel defects or sealing failure caused by non-human impact or improper use, we provide free replacement, free reshipment and bear the round-trip logistics costs. Before sale, we can assist with noise-reduction working condition selection, angle matching, pipeline hydraulic optimization, parameter verification, drawing optimization and budget quotation. During sale, we synchronize production, quality inspection and shipping progress in real time. After sale, we provide installation guidance, pipeline operation and maintenance noise-reduction optimization suggestions and troubleshooting answers. For large environmental protection and HVAC engineering projects, we can provide remote technical disclosure and full-process technical follow-up. Unused standard products with intact packaging support seven-day no-reason return and exchange. After-sale issues are responded to within 2 hours, and a solution is issued on the same day.
FAQ
What is the difference between a flanged Y-type tee and an ordinary T-type tee?
Flanged Y-type tees use a 120° or 135° inclined flow passage, making the transition for flow splitting and merging smoother, with low resistance and low pressure drop loss, while also reducing pipe wall erosion, pipeline vibration, and operating noise; the flow passage has no dead corners and is not prone to scaling. Ordinary T-type tees use 90° right-angle flow splitting, with relatively greater resistance and erosion, and are more suitable for ordinary simple flow-splitting working conditions. If your pipeline has requirements for noise reduction, erosion prevention, and long-term stable operation, it is recommended to choose Y-type inclined tees.
Does the flanged Y-type tee need welding during installation?
No. All three ports of the flanged Y-type tee come with flanges, so during on-site installation, it can be connected to pipelines or equipment using bolts together with sealing gaskets, without the need for on-site welding. This makes installation faster, facilitates later disassembly, assembly, and maintenance, and also avoids the hidden danger of weld seam leakage.
Can you customize Y-type tees with non-standard angles and reducing diameters?
Yes. We support customization of non-standard angles such as 90°, 100°, 110°, 145°, and 150°, and also support customization of any equal-diameter and reducing-diameter reduction ratio. Pressure can be customized from PN6 to PN100 and Class150 to Class1500, and materials can be customized to 2205 duplex steel, Monel alloy, Hastelloy alloy, and special wear-resistant alloy steel. Flange sealing surfaces can be customized in forms such as RF, MFM, TG, and RJ. Please provide the specific angle, diameter, material, and quantity, and we will assist in confirming the solution.
What are the minimum order quantity and delivery time for flanged Y-type tees?
For conventional in-stock mainstream specifications, the minimum order quantity is 1 piece, suitable for sample inspection, sporadic repairs, and small-order replenishment. The warehouse regularly stocks conventional angles of 120° and 135°, conventional pressures of PN10/PN16/PN25, and common specifications of carbon steel and 304 stainless steel, and ships within 24 hours after payment confirmation. The delivery time for non-standard customized orders is determined according to angle, material, pressure rating, and quantity; please contact us to confirm.
What media and working conditions are flanged Y-type tees suitable for?
Flanged Y-type tee can be adapted to a variety of fluids such as clean water, steam, gas, oil products, chemical fluids, sewage, and media containing particles. In terms of working conditions, it can cover room temperature, medium-high temperature, medium-high pressure, and mildly corrosive environments. If your medium has strong corrosion, high temperature, or special particle content, you are welcome to contact us to confirm the material and sealing solution.
