Flanged Cross
A flanged four-way fitting is a heavy-duty pipe fitting of the flanged bolt-fastened type for four-way flow diversion and convergence. It relies on flanges, sealing gaskets, and high-strength bolts tightened together to form a high-strength, highly sealed, detachable four-way pipe junction, without the need for on-site welding to form it, and the connection is safe, stable, and convenient to inspect and maintain. It is mainly used for four-way medium distribution, convergence and manifold collection, and pressure-stabilizing diversion operations in ring pipe networks in industrial high-pressure main pipelines. It can achieve equal-diameter even distribution and diversion as well as reduced-diameter flow regulation, and is suitable for large-diameter, high-pressure, high-temperature-difference, and high-risk medium main pipeline systems. Unlike welded four-way fittings, the flanged structure can be disassembled and reassembled at any time, making it easy to inspect and maintain pipelines, isolate equipment, expand and renovate pipe networks, and replace and maintain valves, greatly reducing later-stage operation and maintenance costs. The product has a forged overall structure with high strength, pressure resistance, and impact resistance, and sealing
Inquiry
- The core advantages of the flanged cross are detachability for easy maintenance, ultra-high pressure resistance, stable sealing, robust structure, and large safety redundancy
- It is the optimal cross selection for high-pressure heavy-industry pipeline networks. Integrally forged and formed in one piece
- No spliced welds, no sand holes or gas pores, and the material is dense and uniform
- Mechanical strength, pressure resistance, temperature resistance, and impact resistance far exceed those of ordinary welded crosses
- It can withstand ultra-high pressure and alternating high-temperature working conditions over the long term. Flange bolt fastening + gasket sealing structure
Detailed Introduction
The flanged cross adopts a flange bolt fastening structure, requiring no on-site welding, and can achieve diversion or confluence of four pipeline routes. The product complies with national standards GB/T12459, HG/T20592 and American standards ASME B16.5, B16.9. The nominal diameter range is DN25-DN600, and the pressure rating covers PN16-PN160 and Class150-Class900. The main body materials include carbon steel, stainless steel, alloy steel and duplex steel. The flange types include PL plate flat welding, SO neck flat welding and WN neck butt welding. The sealing surface options include RF raised face, FF full face and RTJ ring joint face. This structural design allows pipeline maintenance, equipment isolation and pipe network renovation without cutting pipes, greatly reducing operation and maintenance costs. The product is widely used in high-pressure and high-temperature working conditions such as petroleum refining, natural gas, thermal power, coal chemical industry and urban heating, and is a four-way diversion solution with a relatively high safety level in industrial pipeline systems.
- Detachable structure: flange bolt fastening, no on-site welding required, convenient for maintenance, isolation and capacity expansion renovation
- High pressure-bearing capacity: pressure rating covers PN16-PN160, Class150-Class900, suitable for high-pressure working conditions
- Diverse materials: carbon steel, stainless steel, alloy steel, duplex steel optional, meeting the needs of different media
- Standard compatibility: implements national and American standards, supports German standards and Japanese standards, with strong international versatility
- Reliable sealing: multiple sealing surfaces RF, FF, RTJ, suitable for high-temperature and high-pressure and high-risk media
- Flexible customization: supports non-standard reducing, extra-large diameter, special materials and surface treatment customization
| Product Name | Flanged Cross |
| Categories | Contact us to confirm |
| Standard | GB/T12459, HG/T20592, ASME B16.5, DIN, JIS; nominal diameter: DN25-DN600; national standard pressure: PN16-PN160; American standard pound rating: Class150-Class900; structural type: equal-diameter flanged cross, reducing flanged cross; flange type: PL plate flat welding, SO neck flat welding, WN neck butt welding; sealing surface type: RF raised face, FF full face, RTJ ring joint high-pressure seal; forming process: integral die forging, hydraulic forming, seamless integrated process; flaw detection standard: 100%RT/UT non-destructive testing; working temperature: -40℃~650℃; suitable media: high-temperature steam, high-pressure oil and gas, gas |
| Customization | Our factory possesses comprehensive heavy-industry high-end non-standard customization capabilities for flange crosses across all dimensions, capable of fully satisfying the supporting needs of domestic and overseas high-pressure heavy industry, special working conditions, old pipeline network renovation, and overseas non-standard projects. We can customize any non-standard reducing ratio, extra-large diameter, and ultra-high pressure PN160/Class900 reinforced pressure-bearing flange crosses, suitable for ultra-high demanding process working conditions. We support customization of all flange structures, including switching among PL, SO, and WN flanges, precision machining of multiple sealing face types such as RF/FF/RTJ, and customized high-pressure ring joint sealing structures as needed. We support special surface process customization, including hot-dip galvanizing, heavy anti-corrosion and anti-rust treatment, stainless steel mirror precision polishing, and pickling and passivation treatment, suitable for humid, corrosive, and outdoor heavy-industry environments. According to overseas project drawings and old |
| MOQ | Our factory's flange crosses adopt a foreign-trade flexible low-threshold minimum order mechanism, suitable for all sizes of heavy-industry procurement needs domestically and overseas, with flexible ordering and no mandatory threshold. For conventional carbon steel PL plate flat welding and RF raised face standard flange crosses, the MOQ for mainstream specifications is as low as 1 piece, which can fully satisfy engineering trial samples, project sample display, partial renovation of high-pressure pipeline networks, equipment replacement parts, small trial orders, and scattered |
| Lead Time | Our factory maintains massive stock inventory of conventional national standard and American standard ordinary pressure flange crosses, with sufficient mainstream specifications in carbon steel and stainless steel, equal diameter and reducing diameter. Stock orders are shipped extremely fast within 24 hours, quickly responding to overseas heavy-industry urgent orders, high-pressure pipeline network emergency repairs, project rush work, and procurement needs with tight schedules. For conventional standard batch orders, the forging and precision machining automated production line has ample capacity, mature processes, and quality control |
| Packaging | Our factory's flange crosses, as heavy-industry high-pressure precision forged pipe fittings, adopt foreign-trade heavy-industry-grade thickened protective export packaging, specially protecting flange sealing faces, bolt holes, and precision-turned end faces, preventing collisions, scratches, deformation, rust, and precision damage. All products undergo anti-rust treatment before leaving the factory; carbon steel parts are sprayed with industrial anti-rust oil, and stainless steel parts undergo pickling and passivation to prevent oxidation, ensuring no rust or corrosion during long-term sea transportation. Special protective adhesive pads are applied to flange sealing faces and precision-turned end faces, fully covering and protecting precision-machined surfaces, preventing transportation wear and collision dents. Each piece is individually wrapped with thickened bubble film and pearl cotton for cushioning, isolating friction damage. Small and medium specifications are classified and packed into thickened reinforced export cartons; large-diameter heavy flange crosses are packed on thickened solid wood fumigated pallets, with overall steel strapping for fastening and anti-slip binding |
| Reference Price | Inquiry |
Applications
- Four-way diversion or merging of main process pipelines in petroleum refining and chemical processing, in occasions requiring frequent maintenance
- Distribution nodes in high-pressure long-distance natural gas transmission pipelines, requiring high sealing performance and detachability
- Steam thermal systems of thermal power plants, requiring resistance to high temperature and high pressure and facilitating equipment isolation
- High-pressure reaction pipelines in coal chemical processing, with flammable and explosive media, requiring high-safety-grade pipe fittings
- Urban central heating main pipeline network, with frequent later-stage maintenance and capacity expansion needs
Overview
A flanged cross is a detachable cross-shaped flow-dividing pipe fitting with flanges on all four ports, which relies on bolts tightening the flanges and sealing gaskets to achieve pipeline connection; it belongs to high-pressure industrial pipeline supporting pipe fittings and is different from welded integral crosses. The manufacturing processes are divided into hot pushing, hydraulic bulging, and forging, implemented according to national standards GB/T12459, HG/T20592, American standards ASME B16.5, ASME B16.9, with nominal diameters DN25‑DN600 and pressure ratings PN16‑PN160 / Class150‑Class900. Main body materials include carbon steel, stainless steel, alloy steel, and duplex steel; flange types include PL plate flat welding, SO neck flat welding, WN neck butt welding, and sealing surfaces RF raised face, FF full face, and RTJ ring joint face are optional. Flanged crosses are convenient to disassemble, assemble, and maintain, with high pressure-bearing ratings, suitable for high-temperature, high-pressure, oil and gas, chemical, power station, heating and other working conditions, mostly used for four-way flow splitting and merging of process main pipes, and are high-frequency selected cross pipe fittings in heavy industry foreign trade projects.
Key Features
The core advantages of flanged crosses lie in being detachable, easy to inspect and maintain, ultra-high pressure resistance, and stable sealing. Integral forging and one-piece molding, no splicing welds, no sand holes or pores, dense and uniform material, mechanical strength, pressure resistance, temperature resistance, and impact resistance far exceed ordinary welded crosses, and can withstand ultra-high pressure and high-temperature alternating working conditions for a long time. The flange bolt fastening plus gasket sealing structure provides stable sealing performance, vibration resistance, no leakage hidden dangers, and eliminates the risk of high-pressure medium leakage. The detachable design allows pipeline network maintenance, equipment isolation, pipeline modification, and valve replacement without cutting pipes, greatly reducing later-stage operation and maintenance costs and shortening shutdown periods. The product has a high degree of specification standardization and strong international universality, adapting to multiple international standards.
Applications
Flanged crosses mainly target permanent heavy industry pipeline network scenarios with large diameters, high temperature and high pressure, hazardous media, and frequent maintenance needs, and are heavy-duty cross pipe fittings specially used for industrial core process pipelines. They are widely used in petroleum refining main process pipeline networks, natural gas high-pressure long-distance transmission pipelines, thermal power plant steam and heat systems, coal chemical high-pressure reaction pipelines, urban central heating main pipeline networks, heavy industry equipment high-pressure fluid systems, and overseas large-scale energy infrastructure high-pressure pipeline projects. They are especially suitable for hazardous working conditions where welded crosses cannot be disassembled, later maintenance is difficult, pressure and temperature are extremely high, and media are flammable, explosive, and highly corrosive. The flange detachable structure perfectly solves the problems of pipeline network maintenance isolation, equipment replacement, and pipeline capacity expansion. The product structure is stable, the pressure-bearing upper limit is high, and the safety redundancy is large, and it can adapt to long-term uninterrupted operation, high impact, high-temperature alternating, and complex stress working conditions. It is not suitable for ordinary civil low-pressure water supply and drainage or light prefabricated pipeline networks, and is specially designed for industrial heavy industry, energy high-pressure, and hazardous process core pipelines.
Specifications
The implementation standards of flanged crosses include national standards GB/T12459, HG/T20592, American standards ASME B16.5, ASME B16.9, as well as German standard DIN and Japanese standard JIS. The nominal diameter range is DN25-DN600, and the pressure ratings cover PN16-PN160 (national standard) and Class150-Class900 (American standard). Structural types include equal-diameter flanged crosses and reducing flanged crosses. Flange types include PL plate flat welding, SO neck flat welding, and WN neck butt welding. Sealing surface types include RF raised face, FF full face, and RTJ ring joint face (high-pressure sealing). Forming processes include integral die forging, hydraulic forming, and seamless one-piece process. Inspection standards are 100% RT/UT non-destructive testing. The working temperature range is -40℃~650℃. Compatible media include high-temperature steam, high-pressure oil and gas, gas, etc. Main body materials can be selected from carbon steel, stainless steel, alloy steel, and duplex steel. Specific configurations can be confirmed according to project requirements; welcome to contact us for detailed parameters.
Purchase & Delivery
Our factory adopts a flexible low-threshold minimum order mechanism for foreign trade on flanged crosses. The MOQ for mainstream specifications of conventional carbon steel PL plate flat welding, RF raised face standard flanged crosses is as low as 1 piece, which can meet the needs of engineering trial samples, project prototypes, pipeline network renovation, and equipment replacement. We keep regular stock of conventional national standard and American standard ordinary-pressure flanged crosses, with sufficient mainstream specifications of carbon steel and stainless steel equal-diameter and reducing types, and stock orders are shipped rapidly within 24 hours. For conventional standard batch orders, the forging and finishing automated production line has abundant capacity, mature processes, and stable quality control. Packaging uses foreign trade heavy industry-grade thickened protective export packaging, specially protecting flange sealing surfaces, bolt holes, and finely turned end faces, preventing collisions, scratches, deformation, and rust. All products undergo anti-rust treatment before leaving the factory; carbon steel parts are sprayed with industrial anti-rust oil, and stainless steel parts are pickled and passivated for oxidation resistance. Small and medium specifications are classified and packed into thickened reinforced export cartons, while large-diameter heavy-duty flanged crosses are packed on thickened solid wood fumigated pallets, fastened overall with steel straps, anti-slip bundling, and waterproof film covering, able to withstand long-distance ocean shipping. The outer packaging clearly marks specifications, pressure ratings, flange types, materials, standards, batches, and export shipping marks. Neutral unbranded packaging, customer LOGO private labeling, and exclusive project shipping mark customization are supported. Please contact us to confirm specific delivery times and logistics methods.
Service & Support
Our factory provides an exclusive after-sales system for heavy industry high-pressure pipe fittings. All flanged crosses undergo five strict quality inspections before leaving the factory: appearance screening, fine inspection of flange flatness, verification of sealing surface precision, calibration of bolt hole spacing, and non-destructive testing, eliminating the shipment of defective products with deformation, eccentricity, precision deviation, poor sealing, or substandard materials. If after receiving the goods customers encounter problems such as original factory quality defects, wrong specifications shipped, non-conforming flange dimensions, sealing surface damage, transport damage, or pressure leakage, we bear full responsibility, support free replacement, unconditional return and exchange, and re-forging customization, and fully bear the round-trip logistics loss costs. We provide customers free of charge with high-pressure heavy industry pipeline network selection guidance, flange bolt and gasket adaptation solutions, high-pressure pipeline installation and commissioning technical guidance, pipeline network layout optimization solutions, full-process technical Q&A, and complete sets of parameter drawings and process materials. We support long-term cooperative customers with inventory custody, partial shipments, replenishment on demand, and price-locked stocking services. Products operate stably for the long term under normal compliant working conditions with reliable warranty; for non-human damage, lifetime after-sales rights protection is available, with one-on-one exclusive order tracking service, fully guaranteeing stable construction and safe production and operation of heavy industry engineering projects at home and abroad.
FAQ
What advantages do flanged crosses have compared with welded crosses?
The flanged cross adopts a flanged bolt fastening structure, is detachable, can be repeatedly disassembled and reassembled for inspection and repair, and is convenient to maintain, without the need for hot work cutting. It is especially suitable for heavy-duty main pipelines under high pressure and high risk that require regular maintenance and later capacity expansion and modification. Its safety and operation and maintenance convenience far exceed those of fixed welded crosses.
How do you select the type for different flange styles?
For conventional medium- and low-pressure working conditions, PL plate-type slip-on flanged crosses can be selected; for medium- and high-pressure working conditions, SO hubbed slip-on flanged crosses are recommended; for high-temperature and high-pressure, ultra-high-pressure core process main pipelines, WN hubbed welding neck flanged crosses are recommended, as their strength and sealing performance are optimal. For specific selection, you can contact us to confirm according to working pressure, temperature, and medium.
What scenarios is the RTJ sealing face suitable for?
The RTJ ring joint face seal is specially used for Class 600 and above ultra-high-pressure, high-temperature, high-risk flammable and explosive medium working conditions. Its sealing pressure resistance rating far exceeds that of ordinary RF raised face, and it is suitable for occasions with extremely high requirements for sealing performance.
Is it compatible with international standards?
The full series supports national standards GB/T12459 and HG/T20592, American standards ASME B16.5 and B16.9, as well as German standard DIN and Japanese standard JIS. Bolt hole spacing and sealing dimensions are universally compatible, and it can meet the needs of international engineering projects.
Q1: What are the advantages of flanged crosses compared with welded crosses? Answer: Flanged crosses are detachable, can be repeatedly disassembled and reassembled for inspection and repair, are convenient to maintain, and do not require hot work cutting.
Please contact us and provide specific specifications, purchase quantity, and delivery requirements, and we will assist in confirming a suitable solution.
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