Thickened tees, also known as thick-wall high-pressure tees, are branch and merging pipe fittings used in high-pressure, heavy-duty industrial pipeline networks. Compared with tees of conventional wall thickness, we thicken the pipe wall as a whole and also reinforce the high-stress areas of the branch pipe, with the aim of improving pressure-bearing capacity, impact fatigue resistance, and high-temperature deformation resistance, while using the thickening allowance to offset long-term corrosion and wear by the medium. The products cover DN15–DN1200 diameters, and wall thickness grades include ultra-thick-wall specifications such as SCH160 and XXS, suitable for PN100–PN160, Class600–900LB medium-high-pressure and ultra-high-pressure pipeline networks. The material system includes 20#, 16Mn carbon steel, 304 and 316L stainless steel, as well as 15CrMo and 12Cr1MoV alloy steel, which can respectively correspond to high-pressure water, oil, gas, and steam, corrosive high-pressure pipelines, and ultra-high-temperature high-pressure power plant and petrochemical pipeline networks. Structural forms include equal-diameter, reducing, and 45° oblique thickened tees, and connection methods can be butt welding, flange, socket welding, and threaded. If you are undertaking new construction of high-pressure pipeline networks, quality-improvement technical renovation of old pipeline networks, or replacement of high-risk points, you are welcome to contact us to confirm the thickening grade, material, and interface standards.
Product Overview
Thickened tees are high-pressure pipe fittings that undergo overall wall thickness thickening and pressure-bearing strengthening on the basis of standard wall thickness tees. They are used for diversion and merging in high-pressure heavy-load, high-temperature alternating, impact vibration, and corrosive industrial pipeline networks. Their function is not simply to increase wall thickness, but to reinforce standard tees against shortcomings such as bulging under high pressure, tearing and leakage, high-temperature deformation, and corrosion thinning. Products cover DN15–DN1200 diameters, and wall thickness grades include SCH160 and XXS ultra-thick walls, adapting to PN100–PN160, Class600–900LB medium-high pressure and ultra-high pressure pipeline networks. Materials include three major systems: carbon steel, stainless steel, and alloy steel. Structural forms include equal-diameter, reducing, and 45° oblique thickened tees. Connection methods can be butt welding, flange, socket welding, and threaded.
Key Selling Points
First, the overall wall thickness is thickened, and the pressure-bearing and explosion-proof capacity is significantly improved compared with standard-wall-thickness tees, making it suitable for high-pressure and ultra-high-pressure working conditions. Second, special reinforcement is applied to the high-stress area of the branch pipe, targeting the stress concentration and root tearing problems that easily occur at the diversion point. Third, the wall thickness grades cover SCH160 and XXS ultra-thick walls, and can be matched according to PN100–PN160 and Class600–900LB working conditions. Fourth, the material system includes 20# and 16Mn carbon steel, 304 and 316L stainless steel, and 15CrMo and 12Cr1MoV alloy steel, and can correspond to different working conditions such as high-pressure water, oil, gas, and steam, corrosive media, and ultra-high-temperature steam. Fifth, the inner wall flow channel remains smooth, and the thickening is concentrated on the outer wall and stress areas, without affecting the normal transportation of the medium. Sixth, it supports customized production for the full diameter range of DN15–DN1200 as well as non-standard sizes, special branch angles, and non-standard wall thicknesses.
Applications
Thickened tees are mainly used in high-pressure, high-temperature, corrosive, and heavy-load pipeline networks where standard-wall-thickness tees are difficult to handle. In electric power and thermal power scenarios, they are used for branch diversion and direction change in high-temperature and high-pressure main steam pipeline networks and high-pressure feedwater circulation main pipeline networks. In petrochemical scenarios, they are used for diversion and confluence in high-pressure process fluid, high-pressure oil and gas, and corrosive medium pipelines. In high-pressure gas scenarios, they are used in urban high-pressure transmission and distribution pipeline networks and high-risk branch pipelines at stations. In thermal and heavy industry scenarios, they are used in high-temperature and heavy-load steam pipeline networks and thermal pipelines with frequent startup and shutdown. In corrosive industrial scenarios, they are used in pipelines with mild acid-base corrosion and long-term medium wear. In special equipment scenarios, they are used in supporting high-pressure units and connecting pipelines of heavy-load equipment. In addition, they are also suitable for safety upgrades of old high-pressure pipeline networks, replacement of corroded and worn pipelines, and technical transformation projects for reinforcing heavy-load impact points.
Specifications
The diameter range covers DN15–DN1200, and the wall thickness grades include SCH160 and XXS ultra-thick walls; other thickening grades can also be confirmed according to project requirements. The pressure grades are suitable for PN100–PN160 and Class600–900LB medium-pressure and ultra-high-pressure pipeline networks. The main materials include 20# and 16Mn carbon steel, 304 and 316L stainless steel, and 15CrMo and 12Cr1MoV alloy steel; please contact us to confirm other materials. Structural forms include equal-diameter, reducing, and 45° oblique thickened tees, and connection methods can be butt welding, flange, socket welding, and threaded. Executive standards include GB/T12459, ASME B16.9, DIN, and electric power DL/T high-pressure pipeline standards. In terms of customization, non-standard pipe diameters, oversized thickened wall thicknesses, special reducing ratios, non-standard branch angles, interface standards, and marking LOGO customization are supported. Please contact us to confirm specific specifications and thickening grades.
Procurement & Delivery
Thickened tees belong to high-pressure thick-wall pipe fittings. Before purchasing, it is recommended to confirm the diameter, wall thickness grade, pressure grade, material, connection method, and executive standard. We have tiered minimum order rules. DN15–DN100 conventional SCH160 carbon steel and stainless steel thickened tees are in stock; for other specifications and materials, please contact us to confirm the minimum order quantity and delivery cycle. For DN15–DN100 conventional in-stock orders, wall thickness re-inspection is completed within 24–48 hours after order confirmation; the delivery time for other specifications is confirmed according to the production schedule. Packaging adopts a foreign-trade-grade anti-deformation, anti-collision, moisture-proof, and rust-proof solution. Welding bevels, flange sealing surfaces, and threaded ports are equipped with anti-collision protection rings and dust plugs. Carbon steel parts undergo heavy rust-proof treatment, and stainless steel parts are packaged separately in isolation. For full-container shipments, fumigation-free pallets are used for stacking and steel strapping is applied for reinforcement. English marks, specification batches, and customer LOGOs can be customized.
Service & Support
We provide pre-sales selection, in-sales coordination, and after-sales support for thickened tee purchasing customers. The pre-sales technical team can assist in matching thickening grades and material solutions according to pipeline network pressure, temperature, medium corrosion, and impact load levels. Before leaving the factory, products undergo piece-by-piece wall thickness verification, dimensional calibration, hydrostatic pressure test, non-destructive testing, and mechanical property sampling inspection. The warranty period is 18 months, with 7×24-hour response. If problems occur that belong to factory forging thickening, forming processing, or process quality defects, we support free returns and exchanges and free replacement shipments. After-sales support can provide installation guidance, operation and maintenance Q&A, batch goods counting coordination, and logistics tracking, and assist overseas customers with rapid customs clearance. Welcome to contact us to confirm specific configurations and quotations.
FAQ
What is the core advantage of thickened tees compared with standard tees?
Thickened tees are made by overall wall thickness thickening and branch pipe stress area reinforcement on the basis of standard-wall-thickness tees. Their pressure-bearing and explosion-proof capacity is significantly improved, and they can dissipate high-pressure stress concentration. Their performance in resisting high-temperature deformation, corrosion wear, and impact fatigue is better. They mainly solve the problems of standard tees being prone to bulging, tearing, and leakage under high-pressure working conditions.
How to choose the thickening grade?
For conventional medium and high pressure impact working conditions, SCH160 thickening can be selected; for ultra-high pressure, high-risk explosion-proof or long-term corrosion working conditions, XXS ultra-thick wall can be selected; for local stress-weak points, special reinforcement thickened models can be selected. For specific selection, please contact us. After providing pressure, temperature, medium and impact load information, we will assist in confirmation.
Does the thickened design affect medium flow?
The thickening is concentrated on the outer wall and stress areas. The inner wall flow channel remains smooth and regular, with no protruding resistance. The medium transportation is unobstructed, and normal flow will not be affected by the thickening.
What materials and connection methods are supported for thickened tees?
Materials include 20#, 16Mn carbon steel, 304, 316L stainless steel, 15CrMo, 12Cr1MoV alloy steel. For other materials, please contact us for confirmation. Connection methods can be butt welding, flange, socket welding and threaded. Interface standards can be customized according to national standards, American standards, German standards and Japanese standards.
How are the minimum order quantity and delivery lead time confirmed?
DN15–DN100 conventional SCH160 carbon steel and stainless steel thickened tees are in stock. After order confirmation, wall thickness re-inspection is completed within 24–48 hours. For the minimum order quantity and delivery lead time of other specifications and materials, please contact us and provide size, quantity and material requirements, and we will assist in confirmation.
