Thick-wall high-pressure tees are a high-pressure upgraded version of standard tees and ordinary thickened tees, designed for harsh working conditions such as ultra-high pressure, high-temperature alternating cycles, flammable and explosive environments, and strong scouring corrosion. The product adopts integral forging, seamless hot pressing, and one-piece forming processes; the pipe wall is uniformly thickened throughout, with a dense metallographic structure, free of porosity, sand holes, and layered false thickness, fundamentally solving the problems that ordinary tees are prone to under high pressure, such as bulging, tearing and leakage, high-temperature creep deformation, and scouring thinning and damage. Mechanical optimization has been carried out for the stress concentration area at the root of the tee branch, improving impact resistance, fatigue resistance, and burst resistance. Structural forms include equal-diameter, reducing, and 45° lateral tees, and connection methods support butt welding, socket welding, flange, and thread. Specifications cover DN15–DN1200, wall thicknesses follow SCH160 and XXS grades, and pressure adaptation is PN100–PN160 and Class600–900LB. Materials can be selected from carbon steel, stainless steel, and alloy steel, suitable for medium transportation such as high-pressure oil and gas, high-temperature steam, acid and alkali corrosion, and high-pressure gas.
Overview
Thick-wall high-pressure tees are high-strength pressure-branching pipe fittings specially used for ultra-high-pressure, high-temperature alternating, flammable and explosive, and strongly scouring and corrosive industrial pipeline networks, and they are core safety pressure-bearing accessories of high-pressure piping systems. They are a high-pressure upgraded and strengthened version of standard tees and ordinary thickened tees, mainly solving problems that ordinary tees are prone to under high-pressure working conditions, such as bulging, tearing and leakage, high-temperature creep deformation, and scouring-induced thinning and damage. The products adopt integral forging, seamless hot pressing, and one-piece molding processes; the pipe wall is uniformly and densely thickened throughout, with no interlayer false thickness, no locally thin areas, and no porosity or sand holes, and the metallographic structure is stable. Specifications cover the full range of DN15–DN1200, wall thickness follows the SCH160 and XXS ultra-thick-wall high-pressure dedicated grades, and pressure adaptation covers the full gradient of PN100–PN160 and Class600–900LB ultra-high-pressure working conditions. Materials cover the three major high-pressure dedicated systems of carbon steel, stainless steel, and alloy steel, and can adapt to the transportation of high-risk media such as high-pressure oil and gas, high-temperature steam, acid and alkali corrosion, and high-pressure gas.
Key Features
The core advantages of thick-wall high-pressure tees are concentrated in two aspects: pressure-bearing safety and service life. First, integral forging, seamless hot pressing, and one-piece molding, with the pipe wall uniformly thickened throughout, a dense metallographic structure, and no porosity, sand holes, or layered false thickness; the burst pressure is greatly improved compared with conventional tees. Second, targeted structural optimization is carried out for the stress concentration area at the root of the tee branch, effectively dissipating fluid impact and high-temperature alternating stress and reducing the risk of cracking at the branching point. Third, wall thickness follows SCH160 and XXS grades, which are higher than the conventional STD, SCH40, and SCH80 standard wall thicknesses; sufficient corrosion allowance can offset long-term medium scouring and oxidative corrosion and extend the service life of the fitting. Fourth, it has good high-temperature resistance and creep resistance, suitable for high-temperature and high-pressure steam pipeline networks within 550°C. Fifth, the material system covers carbon steel, stainless steel, and alloy steel, and can match different temperature, pressure, and corrosion working conditions. Sixth, before leaving the factory, each piece undergoes wall thickness verification, dimensional calibration, hydrostatic pressure test, non-destructive testing, and mechanical property sampling inspection, with an 18-month warranty.
Applications
Thick-wall high-pressure tees are mainly aimed at harsh industrial working conditions with high safety levels such as medium and high pressure, ultra-high pressure, high-temperature alternating, high-frequency start-stop impact, flammable and explosive, and medium corrosion and wear. In the electric power and thermal power field, they are used for branching and reversing of high-temperature and high-pressure main steam pipelines and high-pressure feedwater main pipeline networks within 550°C, requiring resistance to high-temperature creep and high-pressure fatigue. In the petrochemical field, they are used for branch connections of high-pressure process fluids, high-pressure oil and gas, and acid and alkali corrosive medium pipelines, and need to withstand long-term scouring wear while maintaining stable pressure and explosion prevention. In the high-pressure gas field, they are used for core branch pipelines of urban high-pressure transmission and distribution networks and gas stations, adapting to flammable and explosive high-risk working conditions. In the thermal and heavy industry field, they are used for splitting and merging points of high-temperature heavy-load steam pipelines and high-frequency start-stop thermal pipeline networks. In addition, they are also suitable for technical transformation projects such as safety upgrades of old high-pressure pipeline networks, rectification of high-temperature and high-pressure defects, and replacement of corroded and worn pipe sections.
Specifications
Thick-wall high-pressure tees cover the full range of DN15–DN1200, wall thickness follows the SCH160 and XXS ultra-thick-wall high-pressure dedicated grades, and pressure adaptation covers PN100–PN160 and Class600–900LB. The products are manufactured according to GB/T12459, ASME B16.9, electric power DL/T, and DIN high-pressure pipe fitting standards. Structural forms include equal-diameter tees, reducing tees, and 45° lateral tees; connection methods support butt welding, socket welding, flange, and threaded connection. Materials can be selected from carbon steel, stainless steel, and alloy steel, and the specific grades can be confirmed according to working conditions. We support customization of dimensions, wall thickness, material, interface standards, and non-standard structures, and can produce according to customer drawings, mechanical parameters, or overseas technical agreements. If you need to confirm specific specification selection or obtain a quotation, please contact us and provide the pipeline pressure, temperature, medium characteristics, and required quantity.
Purchasing & Delivery
Thick-wall high-pressure tees are custom pipe fittings for high-pressure special equipment. Before procurement, it is recommended to confirm the pipeline design pressure, working temperature, transported medium, connection standard, and required quantity, so that we can assist in matching the wall thickness grade and material solution. We have set low-threshold tiered minimum order rules, adapting to different procurement scenarios such as emergency repair and technical transformation of high-pressure pipeline networks, replacement of high-risk damaged points, batch engineering centralized procurement, and foreign trade heavy-industry distribution. We keep in stock DN15–DN100 small and medium-diameter SCH160 conventional thick-wall high-pressure tees; orders for conventional stock styles are completed within 24–48 hours for wall thickness re-inspection, pressure sampling inspection, anti-rust reinforcement, and packaging and shipment. For the delivery cycle of customized orders, please contact us to confirm. Packaging adopts a foreign-trade-grade heavy-industry reinforcement solution; welding bevels, flange sealing surfaces, and threaded ports are equipped with dedicated anti-collision protection rings and dust plugs; carbon steel fittings undergo heavy anti-rust and anti-corrosion treatment; stainless steel fittings are individually isolated and packaged; and customized English shipping marks, specification batches, and customer LOGOs are supported.
Service & Support
We provide full-process services for engineering and foreign trade customers purchasing thick-wall high-pressure tees. In the pre-sales stage, the technical team can assist in matching the wall thickness grade and material solution according to pipeline network pressure, temperature, medium characteristics, and impact load, reducing selection deviations. All products undergo piece-by-piece wall thickness verification, dimensional calibration, hydrostatic pressure test, non-destructive testing, and mechanical property sampling inspection before leaving the factory. For quality defects in factory forging, forming processing, or process manufacturing, free returns and exchanges and free replacements are supported. After-sales service provides installation guidance for high-pressure pipe fittings, answers questions on operation, maintenance, and upkeep of high-risk pipeline networks, coordinates batch goods counting, and provides full-process logistics tracking to assist overseas customers with rapid customs clearance. The products have an 18-month warranty and 7×24-hour response. If you need to understand a specific working condition adaptation solution or request a quotation, please contact us.
FAQ
What is the difference between thick-wall high-pressure tees and ordinary thickened tees?
Thick-wall high-pressure tees adopt high-pressure dedicated forging processes, and wall thickness strictly follows SCH160 and XXS high-pressure standards, with a denser metallographic structure and higher burst pressure. The products have undergone targeted structural optimization for high-pressure stress concentration areas, adapt to high-risk working conditions such as ultra-high pressure, high temperature, and flammable and explosive environments, and have higher performance than ordinary thickened pipe fittings.
What are the common pressure ratings?
The mainstream options are compatible with PN100 and PN160 national standard pressure ratings, as well as Class600 and Class900LB American standard high-pressure ratings, which can meet common high-pressure working conditions in fields such as power, petrochemicals, high-pressure gas, and thermal heavy industry. For specific selection, please contact us for confirmation.
Will thickened inner walls affect flow?
The product is thickened only on the outer wall and stress areas, while the inner wall flow channel remains smooth and flat, with no protrusions and no eddy currents, and will not create additional resistance to medium flow.
What materials and connection methods are supported?
Materials cover the three major high-pressure dedicated systems of carbon steel, stainless steel, and alloy steel, and can adapt to different temperature, pressure, and corrosion conditions. Connection methods support butt welding, socket welding, flange, and threaded connection. For specific material grades and interface standards, please contact us for confirmation.
Is non-standard customization supported? What are the minimum order quantity and lead time?
We support customization of dimensions, wall thickness, materials, interface standards, and non-standard structures, and can produce according to customer drawings, mechanical parameters, or overseas technical agreements. The minimum order quantity adopts a low-threshold tiered rule. Regular in-stock styles ship within 24–48 hours. For customized order lead times, please contact us for confirmation.
