Alloy Steel Elbow
Alloy steel elbows are core specialized pipe fittings for severe piping systems involving high temperature, high pressure, hydrogen service, abrasion resistance, and creep resistance. They are mainly made of chromium-molybdenum alloys and heat-resistant alloys, formed integrally through hot pushing, hot extrusion, medium-frequency induction bending, and precision forging. Unlike ordinary carbon steel and stainless steel fittings, alloy steel elbows possess special properties such as high-temperature strength, creep resistance, resistance to high-pressure impact, resistance to hydrogen corrosion, and no brittle fracture at low temperatures. They are irreplaceable pressure piping components for power stations, boilers, thermal power systems, coal chemical plants, and hydrogenation units. Mainstream materials include 15CrMo, 12Cr1MoVG, Cr5Mo, Cr9Mo, P11/P22/P91, and other full-series alloy grades under Chinese national standards and American standards. The products cover all processes including seamless high-pressure, thick-wall extrusion, medium-frequency large-radius induction bending, and large-diameter rolled fabrication, with standard angles of 45°, 90°, and 180°, and support custom bends with long radius, short radius, and extra-large radius from 3D to 10D. The products are strictly manufactured in accordance with GB/T12459, GB/T13401, ASME B16.9, ASTM A234, SH/T3408, and other standards, and are specifically designed for industrial conditions involving over-temperature, over-pressure, long-term continuous operation, hydrogen corrosion, and high-temperature creep. Full-mode supply is supported, including stock availability, batch engineering projects, foreign trade export, and non-standard custom fabrication according to drawings.
Learn More
Plastic-lined elbow
The plastic-lined elbow is composed of a carbon steel or malleable iron outer layer compounded with a plastic inner liner, combining metal strength with plastic corrosion resistance. The liner material can be selected from PE (for clean water), PP (for high temperature), PO (for strong corrosion), and PTFE (for ultra-strong corrosion) to meet different medium requirements. The product is widely used in pipeline systems such as tap water purification, environmental sewage treatment, chemical acid-alkali, electroplating acid pickling, pharmaceutical clean rooms, desulfurization and denitrification, and HVAC water supply and drainage. It is an economical pipe fitting for low-pressure corrosion protection, water quality preservation, and scale prevention. We offer all sizes and specifications, support non-standard customization, and can confirm specific configurations according to project requirements.
Learn More
Anti-corrosion elbow
Anti-corrosion elbows are key pipe fittings used to connect pipelines and change direction, providing gradient anti-corrosion solutions for different corrosive environments. We offer four major product categories: external anti-corrosion (such as 3PE, epoxy coal tar pitch), stainless steel material anti-corrosion, plastic-lined and PTFE-lined internal anti-corrosion, and alloy anti-corrosion, covering harsh working conditions from municipal water supply and environmental wastewater to chemical acid-alkali and marine salt spray. The products feature rust prevention and scale inhibition, corrosion resistance and wear resistance, and elimination of medium contamination, effectively extending the service life of the pipeline system and ensuring medium purity. We support full-specification non-standard customization, can replicate old irregular-shaped pipe fittings, and meet the needs of emergency repairs, sporadic replenishment, and foreign trade container consolidation. Regular specifications are in ample stock and delivered within one week; high-end special anti-corrosion products are produced on demand in batches. All products come with a 12-month warranty and lifetime technical guidance to ensure long-term stable operation.
Learn More
Special-shaped elbow
Special-shaped elbows are customized solutions launched by Guojie for complex non-standard pipeline projects. When standard pipe fittings cannot be installed due to angle mismatches, dimensional deviations, spatial interference, or interface misalignment, special-shaped elbows can be precisely customized based on actual on-site dimensions, achieving zero-rework installation. The products cover multiple types including non-standard angles, reducing transitions, long and short straight sections, non-standard curvature, three-dimensional spatial configurations, large-diameter lobster-back bends, eccentric misalignment, and combined special shapes, with support for all materials and all working conditions. We provide full-process service from drawing confirmation to finished product delivery, ensuring that every product precisely matches the on-site working conditions. Whether it is old pipeline renovation, equipment connection, or complex three-dimensional pipe networks, special-shaped elbows can provide reliable connection solutions, significantly saving construction costs and time.
Learn More
Reducer elbow
The reducing elbow combines turning and size-reduction functions into one, eliminating the tedious process of joining an elbow with a reducer. The one-piece integrated structure not only reduces the number of welds and lowers the risk of leakage, but also makes the medium flow more smoothly and less prone to fouling, making it especially suitable for clean processes and high-pressure conditions. The product covers concentric, eccentric, 90°, 45°, 180°, and non-standard angles, with long-radius, short-radius, and large-radius options available, and materials include carbon steel, stainless steel, alloy, and plastic-lined or PTFE-lined types. We support project-based customization to ensure precise fit for every reducing pipeline. Whether for equipment connection, pipeline modification, or foreign trade procurement, the reducing elbow provides a safer and more efficient connection solution.
Learn More
Thickened Elbow
The thickened elbow, also known as the thick-wall elbow, ultra-thick-wall elbow, or high-pressure thickened elbow, is a reinforced pipe turning fitting specifically designed for severe working conditions involving high-pressure impact, high-temperature creep, medium erosion, and frequent pressure fluctuations. Based on the standard elbow, it thickens the pipe wall, strengthens the bevel, and optimizes the metallurgical structure, greatly improving pressure resistance, impact resistance, wear resistance, and fatigue resistance. The product is manufactured using hot push integral forming, hot extrusion forging, and medium-frequency induction bending processes, featuring no welds, uniform wall thickness, extremely low ovality, and high pressure ratings. The materials cover the full range of high-pressure materials including carbon steel, stainless steel, chromium-molybdenum alloy steel, and duplex steel, with wall thicknesses covering Sch80, Sch120, Sch160, XXS, and custom ultra-thick walls, nominal diameters from DN15 to DN800, and angles of 45°, 90°, and 180° fully available. The product strictly complies with GB/T12459, GB/T13401, ASME B16.9, ASTM A234, ASTM A403, and SH/T3408 high-pressure piping standards, and is specifically designed for severe working conditions in power plants, petrochemical hydrogenation, coal chemical industry, high-pressure thermal systems, high-pressure hydraulics, and high-pressure gas transmission, solving safety hazards such as pipe bursting, bulging, erosion thinning, and fatigue cracking of standard thin-wall elbows, making it an ideal pipe fitting for high-pressure heavy-duty piping systems.
Learn More
Wear-resistant Elbow
Wear-resistant elbows are special protective elbows for pipelines subjected to particle erosion, pneumatic conveying, slurry abrasion, and high-speed wear, specifically designed to solve the common industry problems of rapid wall thinning, perforation, powder leakage, slurry leakage, and frequent shutdowns for maintenance in ordinary carbon steel and stainless steel elbows. The product adopts seven major mainstream wear-resistant processes: ceramic composite, hardfacing alloy, bimetallic composite, rare earth alloy, silicon carbide, armadillo mesh, and backpack reinforcement. The outer carbon steel layer ensures mechanical strength and welding compatibility, while the inner high-hardness wear-resistant layer resists high-speed erosion and impact from solid particles. The full product range covers four levels of working condition gradients: light wear, medium wear, heavy wear, and ultra-strong impact wear, with nominal diameters from DN15 to DN2000, angles of 45°, 90°, and 180° all available, and supports customization for non-standard angles, extended straight sections, thickened reinforcement, and special-shaped wear-resistant designs. It strictly complies with standards such as GB/T12459, GB/T31803, DL/T680, and ASME B16.9, and is widely used in high-wear industrial systems including power plant ash removal and desulfurization, mining coal washing and tailings, cement building materials, metallurgical blast furnaces, chemical powder handling, and port conveying. Its service life is 5–20 times that of ordinary elbows, making it an essential replacement component for industrial wear pipelines.
Learn More
Insulated Elbow
Insulated elbows are prefabricated insulated turning pipe fittings specially designed for heating pipe networks, low-temperature cold insulation, and anti-freezing energy-saving pipeline systems. They are integrally composite-molded from three layers: the inner working steel pipe, the middle thermal insulation layer, and the outer protective shell. They work in sync with insulated straight pipes for turning, insulation, and waterproof sealing, thoroughly solving engineering pain points of ordinary bare elbows such as large heat loss, condensation and dripping, freezing blockage and cracking, pipe corrosion, and excessive energy consumption in pipe networks. The products are divided into four mainstream systems: polyurethane directly buried insulated elbows, steel-jacketed steel high-temperature steam insulated elbows, detachable outer-jacketed insulated elbows, and PPR integrated insulated elbows, suitable for all temperature-range working conditions including low-temperature water heating, medium-temperature hot water, high-temperature steam, deep cold insulation, outdoor anti-freezing, and buried humid environments. The entire product is factory prefabricated, with a dense insulation layer without voids, tight waterproof sealing, and an aging-resistant and compression-resistant outer protective layer. No on-site secondary spraying or wrapping is required; installation is complete upon placement. The nominal diameter covers DN15–DN2000 in full range, with standard angles of 45°, 90°, and 180°, and supports non-standard angles, extended straight sections, drainage and venting, and integrated fixed-node customization. It strictly complies with standards such as GB/T39246, GB/T29047, CJ/T114, and ASME B16.9, and is widely used in municipal heating, residential district heating, industrial steam, chemical cold insulation, and
Learn More
Tee
A tee is a key fitting in piping systems, used to achieve flow diversion, merging, or branching. Our tee products cover the full range of categories, including standard plain type, high-pressure thick-wall type, wear-resistant type, insulated type, anti-corrosion type, sanitary grade, and special-shaped non-standard types. Materials include carbon steel, stainless steel, alloy steel, duplex steel, and plastic-lined steel. The nominal diameter range is DN15–DN2000, and we support structural customization such as equal tee, reducing tee, lateral tee, Y-type, and crotch tee. Products are strictly manufactured in accordance with standards such as GB/T12459, GB/T13401, and ASME B16.9, and are widely used in industries including municipal heating, petrochemical, power plants, mining and metallurgy, HVAC and fire protection, and new energy clean piping systems. We provide full-process services from selection to delivery, ensuring that the products are adapted to your specific working conditions.
Learn More