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.
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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.
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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.
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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.
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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.
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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.
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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
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Flange elbow
Flanged elbows integrate the directional turning function of an elbow with the detachable sealed connection of a flange, eliminating the on-site process of welding flanges. During installation, bolts are used to fasten the flange face to pipes, valves, pump bodies, or equipment ports, and gaskets are used to form a seal. During later maintenance or modification, they can be directly disassembled and reassembled, reducing the hidden risk of weld seam leakage. The product supports two curvatures: LR long radius (R=1.5D) and SR short radius (R=1.0D). Angles cover 45°, 90°, and 180°, while 30° and 60° can be customized according to drawings. Flange types include PL, SO, WN, and IF. Sealing faces include RF, MFM, TG, RJ, and other forms. Pressure ratings cover PN10 to PN40 and Class150 to Class600. Nominal diameters range from DN15 to DN2000. It complies with standards such as GB/T9113, GB/T12459, ASME B16.5, and ASME B16.9. We can provide technical guidance for model selection and confirm materials, inspection, and export documentation according to project requirements.
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90° Flanged Elbow
The 90° flanged elbow combines the fluid diverting function of an elbow with the quick-installation structure of a flange. When a pipeline needs a right-angle turn, the flanges at both ends are directly bolted together, eliminating the need for on-site hot work welding, making disassembly, assembly, and later maintenance more convenient. The product we manufacture covers three materials: carbon steel, stainless steel, and alloy steel. The bending curvature is available in long radius (1.5D) and short radius (1.0D). The flange face is precision-machined, and the bolt holes are arranged according to standards, so that after connection the sealing faces fit tightly. The product is manufactured according to general industrial standards such as ASME B16.9, ASME B16.5, GB/T12459, and HG/T20592. It is formed by integral forging, seamless stamping, and CNC precision turning. The inner wall of the flow channel is smooth, which helps reduce medium erosion and pressure loss. For standard DN15–DN200 carbon steel and 304/316L stainless steel stock items, re-inspection and shipment can be completed within 24 hours after order confirmation. Non-standard diameters, special wall thicknesses, thickened high-pressure pipe walls, non-standard bending curvatures, and surface treatments such as hot-dip galvanizing, sandblasting, and mirror polishing can all be customized according to project requirements. If you need to confirm specific specifications, materials, or pressure ratings, please contact us.
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