Special steel four-way fittings differ from ordinary carbon steel, conventional stainless steel, and ordinary chrome-molybdenum alloy steel four-way fittings, and are mainly oriented toward strongly corrosive, ultra-low temperature, high chloride ion, strong acid and strong alkali, high-purity, and high-speed erosion wear working conditions that conventional pipe fittings cannot handle. The products are formed by integral forging, precision hot pushing, CNC precision machining, and solution passivation processes, and comply with ASME B16.9, ASME B16.11, GB/T12459, GB/T14383, and ASTM special material standards, and are suitable for STD, Sch40, Sch80, Sch160, and XXS wall thickness grades. Materials can be selected from duplex steel, super duplex steel, low-temperature steel, copper-nickel alloy, Monel, Hastelloy, nickel-based alloy, high-manganese wear-resistant steel and other series, and support customization of DN6–DN800 non-standard sizes, special thickened wall thickness, non-standard oblique four-way fittings, extended high-pressure straight pipe sections, special thread profiles, non-standard flange hole spacing, and eccentric special-shaped transition structures. For specific material matching, pressure ratings, and process solutions, please contact us for confirmation.
- The material system covers duplex steel, super duplex steel, low-temperature steel, nickel-based alloy, copper-nickel alloy, Monel, Hastelloy, and high-manganese wear-resistant steel, and materials can be selected according to medium corrosiveness, temperature, and wear conditions
- Integral forging, precision hot pushing, CNC precision machining, and solution passivation forming, with a dense metallographic structure, no sand holes, no porosity, and no weld defects
- The diameter range covers DN6–DN800, pressure ratings 150LB–10000LB, and it is suitable for the full wall thickness grades of STD, Sch40, Sch80, Sch160, and XXS
- Complies with ASME B16.9, ASME B16.11, GB/T12459, GB/T14383, and ASTM special material standards
- Supports deep customization such as non-standard oblique four-way fittings, extended high-pressure straight pipe sections, special high-pressure thread profiles, non-standard flange hole spacing, and eccentric special-shaped transition structures
- The surface can be treated with dust-free passivation, mirror precision polishing, wear-resistant strengthening, and anti-marine organism adhesion treatment, and can be laser-engraved with English markings, heat numbers, and material pressure parameters
| Product Name | Special Steel Cross |
| Product Category | Cross |
| Customization | The factory has the capability for deep non-standard customization of special steel four-way fittings in all materials, all specifications, and all working conditions, focuses on high-end special pipe fitting customization for extremely harsh working conditions, and covers all conventional and imported non-standard special pipeline needs. Supports DN6–DN800 full-diameter non-standard sizes, special thickened high-pressure wall thickness, unconventional reducing ratios, and ultra-high-pressure special grade customization, and is suitable for connection with imported special equipment, technical transformation of high-end special pipeline networks, and non-standard transformation of extreme working conditions. Materials can be customized in the full range of high-end special materials including duplex steel, super duplex steel, low-temperature steel, copper-nickel alloy, Monel, Hastelloy, nickel-based alloy, and high-manganese wear-resistant steel, covering all scenarios of anti-corrosion, low temperature, wear resistance, high temperature, and cleanliness. Can customize non-standard oblique four-way fittings, extended high-pressure straight pipe sections, special high-pressure thread profiles, non-standard flange |
| MOQ | Special steel four-way fittings adopt a high-end special pipe fitting flexible minimum order quantity model, adapting to the diverse rigid-demand scenarios of special engineering minor technical modifications, pipeline network emergency repairs, equipment replacement, sample submission for inspection, and batch centralized procurement. For conventional small and medium diameter 2205 duplex steel, LF2 low-temperature steel, and conventional copper-nickel alloy standard stock specifications, orders starting from 1 piece are supported, perfectly solving the problems of high procurement thresholds, difficulty in procuring small orders, and |
| Lead Time | Special steel four-way fittings have established a four-tier delivery system of in-stock urgent orders, conventional mass production, high-end premium products, and non-standard special customization, precisely matching the core needs of high-end special engineering for tight schedules, high precision, many customizations, and strict acceptance. The warehouse routinely stocks 2205 duplex steel, conventional low-temperature steel, and ordinary copper-nickel alloy small and medium diameter standard stock; after order confirmation, ultra-fast shipment within 24–48 hours, satisfying special |
| Packaging | Special steel four-way fittings belong to high-end precision special alloy pipe fittings, with expensive materials, high surface precision, easily damaged corrosion-resistant layers, and strict cleanliness requirements; ex-factory they implement high-end refined, dust-free and anti-collision dedicated packaging standards. All products undergo degreasing and dust removal, acid pickling and passivation, and precision decontamination treatment before leaving the factory, ensuring the surface is clean without impurities and without oxidation residue. Threads, bevels, sealing surfaces, and flange end faces are all equipped with thickened dedicated protective caps and dust-proof protective films, eliminating thread stripping, collisions, deformation, and sealing surface damage. High-cleanliness, mirror-grade special products are individually vacuum-sealed and packaged to isolate dust pollution and secondary oxidation. Small and medium specification pipe fittings are individually wrapped in multiple layers of bubble film and packed separately in categorized hard boxes, labeled with material, heat number, pressure rating, and executive standard, eliminating mixed packing friction and scratches. |
| Reference Price | Inquiry |
| Brand | Guojie |
Applications
- Four-way diversion for high chloride ion corrosion pipelines in offshore platforms, coastal pipeline networks, seawater desalination and tidal engineering
- Low-temperature four-way connections for LNG storage tank supporting facilities, liquid nitrogen low-temperature transportation, and cryogenic energy storage equipment pipelines
- Pipelines for fine chemical acid-base reaction kettles, high-temperature corrosion processes, and desulfurization and denitrification waste gas and wastewater pipeline networks
- Four-way fittings required for zero medium contamination in biopharmaceutical, high-purity fluid, and aseptic production systems
- Four-way fittings resistant to high-speed particle wear in mining slurry, thermal power ash conveying, pulverized coal conveying, and tailings erosion pipelines
- Nuclear power auxiliary pipeline networks, marine special conveyance systems, and four-way fittings for high-pressure pipelines of high-end special equipment
Procurement & Delivery
Special steel four-way fittings are quoted based on the combination of material, diameter, pressure rating, and wall thickness. Prices need to be confirmed according to specific specifications and quantities. You are welcome to contact us and provide drawings, dimensions, and quantities so we can assist with the quotation. Conventional small and medium diameter 2205 duplex steel, LF2 low-temperature steel, and conventional copper-nickel alloy standard in-stock specifications support a minimum order of 1 piece; the warehouse regularly stocks standard in-stock items in the above materials and small to medium diameters, and shipment is made within 24–48 hours after order confirmation. For non-standard customization, large-diameter heavy-duty products, and special material products, please contact us to confirm the delivery time.
Service & Support
We provide a 12-month warranty for special steel four-way fittings. During the warranty period, for quality issues such as material nonconformity, corrosion failure, low-temperature cracking, wear leakage, and dimensional deviation that occur under non-human causes such as overpressure, violent installation, or use beyond specified operating conditions in violation of regulations, we will remake or reship free of charge. Before sale, we provide technical guidance on material selection, pressure rating verification, and pipeline scheme optimization; during sale, we track production and shipping progress; after sale, we provide welding guidance, pressure test commissioning, and troubleshooting support. Unused standard products support seven-day no-reason return and exchange, 2-hour quick response, and lifetime free technical consultation.
FAQ
What is the difference between special steel four-way fittings and stainless steel and alloy steel four-way fittings?
Special steel four-way fittings are special alloy pipe fittings designed for extreme operating conditions, focusing on scenarios such as ultra-low temperature, strong corrosion, high wear resistance, high cleanliness, and marine salt spray that conventional pipe fittings are difficult to handle. Stainless steel and alloy steel four-way fittings are more suitable for conventional high-temperature or ordinary anti-corrosion operating conditions, and may fail quickly in environments such as deep sea, LNG, strong acids and alkalis, and particle wear.
How should different special materials be selected?
For seawater and desulfurization scenarios, 2205 or 2507 duplex steel can be considered; for ultra-low temperature operating conditions, LF series low-temperature steel can be selected; for strong corrosion or high-purity media, nickel-based alloys, Hastelloy, or Monel can be evaluated; copper-nickel alloy is often used for seawater pipelines; high-manganese wear-resistant steel is suitable for particle erosion wear conditions. For specific selection, please contact us to confirm according to the medium, temperature, and pressure parameters.
Do you support non-standard customization?
Supported. We can customize DN6–DN800 non-standard sizes, special thickened wall thickness, non-standard inclined cross fittings, extended high-pressure straight pipe sections, special thread profiles, non-standard flange hole spacing, and eccentric irregular transition structures, and can also produce according to imported drawings or overseas technical agreements. Please provide specific drawings or parameters, and we will assist in confirming the solution.
What are the minimum order quantity and delivery time?
Conventional small and medium-diameter 2205 duplex steel, LF2 low-temperature steel, and conventional copper-nickel alloy standard in-stock specifications support a minimum order of 1 piece. The warehouse regularly stocks the above-mentioned materials in small and medium-diameter standard in-stock items, and ships within 24–48 hours after order confirmation. For non-standard customization, large-diameter heavy-duty, and special material products, please contact us to confirm the delivery time.
How are warranty and after-sales support guaranteed?
We provide a 12-month warranty. During the warranty period, for quality issues such as material mismatch, corrosion failure, low-temperature cracking, wear leakage, and dimensional deviation caused by non-human overpressure, violent installation, or use beyond specified operating conditions in violation of regulations, we will remake or reship free of charge. At the same time, we provide pre-sales selection guidance, in-sales progress tracking, and after-sales welding, pressure testing, and operation and maintenance support.
