GB standard four-way

National standard cross fittings are core essential pipe fittings for four-way diversion, four-way convergence, and cross connection of pipe networks in national standard pressure piping systems, mainly used in various pipeline projects suc

GB standard four-way - National standard four-way fully adapts to all municipal, industrial, energy, and environmenta...

GB standard four-way

National standard cross fittings are core essential pipe fittings for four-way diversion, four-way convergence, and cross connection of pipe networks in national standard pressure piping systems, mainly used in various pipeline projects suc

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  • The core advantages of National Standard Four-Way are full-specification universality under national standards, zero standard deviation, extremely strong versatility, stable supply, high cost-effectiveness, and zero acceptance risk for proj
  • It is the most reliable standard cross product for domestic pipeline engineering. The product is strictly produced in accordance with GB/T12459 and GB/T13401 national standards.
  • Dimensions, groove, wall thickness, and pressure-bearing parameters are fully compliant
  • Nationally applicable to all engineering projects, with no regional standard differences
  • 100% pass domestic supervision acceptance and foreign aid national standard project review. Small and medium diameters adopt seamless hot-pressed integrated molding process
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Detailed Introduction

National standard cross belongs to the butt-welded pipe fittings in the national standard pressure piping system. The fitting body has a cross structure, used for four pipelines to meet at the same node, completing four-way diversion or confluence distribution of the medium. According to structure, it is divided into equal-diameter cross and reducing cross: equal-diameter cross is used for cross connection of pipelines with the same diameter, and reducing cross is used for four-way connection of pipelines with different diameters. Nominal diameter covers DN15–DN2000. Small diameters mostly adopt hot-pressed seamless integral forming, and large diameters adopt steel plate rolled and welded process. The groove, outer diameter, wall thickness reduction and dimensional tolerance are implemented according to national standards. Commonly used materials include 20# carbon steel, Q235B, Q345B low-alloy steel, 304, 316L stainless steel and 15CrMo alloy steel. Pressure ratings cover PN10–PN160. Before leaving the factory, hydrostatic test, UT non-destructive testing and spectral re-inspection are carried out, and material certificates and inspection reports can be issued. It is suitable for pipeline projects such as water supply and drainage, heating, gas, steam and chemical fluid transportation.

  • Produced according to GB/T12459 and GB/T13401 national standards. Dimensions, grooves, wall thickness and pressure-bearing parameters are unified, facilitating domestic engineering supervision acceptance and review of foreign-aid national standard projects.
  • Covers two types of structures: equal-diameter and reducing. Nominal diameter DN15–DN2000, pressure rating PN10–PN160, can match municipal low-pressure to industrial high-pressure pipeline working conditions.
  • Small and medium diameters adopt hot-pressed seamless integral forming, with no welds in the whole body; large diameters adopt steel plate rolled and welded process, and welds are subjected to non-destructive testing according to standards.
  • Commonly used materials cover 20# carbon steel, Q235B, Q345B, 304, 316L and 15CrMo, and can correspond to different working conditions such as normal temperature, high temperature, low temperature and corrosive media.
  • Before leaving the factory, hydrostatic test, UT non-destructive testing and spectral re-inspection are provided, and national standard material certificates and inspection reports can be issued, making it convenient for engineering document archiving.
  • Supports customization of dimensions, materials, grooves and anti-corrosion processes according to construction drawings, and can be purchased together with national standard tees, elbows, flanges and reducers as a one-stop solution.
Product NameGB Four-Way
Product CategoryTees & Crosses
All technical parameters of the national standard cross strictly align with China's GB national standards. The parameters are compliant, unified and universally applicable, and suitable for engineering audit and acceptance across the country. Specification parametersNominal diameter DN15–DN2000, seamless pipe fittings comply with GB/T12459, rolled pipe fittings comply with GB/T13401, covering equal-diameter and reducing full structural specifications, wall thickness includes national standard conventional wall thickness, thickened wall thickness, STD, XS full series. Pressure parameters: PN10, PN16, PN25, PN40, PN63, PN100, PN160 full grades, suitable for municipal low-pressure to industrial high-pressure pipeline working conditions. Temperature parameters: carbon steel suitable for -20℃–450℃, stainless steel suitable for -60℃–600℃, suitable for domestic high and low temperature differential working conditions. Material parameters: national standard 20# carbon steel, Q235B plain carbon steel, Q345B manganese steel, 304/316L stainless steel, material composition complete
CustomizationThe factory possesses comprehensive national standard cross deepening customization capabilities, proficient in GB standard parameters and domestic engineering construction specifications, capable of undertaking various national standard deepening, non-standard special-shaped, special working condition customization orders, suitable for complex pipe network construction needs. Dimensional customization can produce DN15–DN2000 any national standard deepening dimensions, non-conventional reducing ratios, thickened high-pressure wall thickness, special end face beveled cross as needed, strictly complying with national standard tolerance standards, suitable for special pipe network layouts. Material customization covers 20# carbon steel, Q235B, Q345B low-alloy steel, 304/316L stainless steel, 15CrMo heat-resistant alloy steel, suitable for high-temperature resistant, high-pressure, corrosion-resistant special working conditions. Process customization supports sandblasting and rust removal, black paint anti-corrosion, hot-dip galvanizing, pickling and passivation, epoxy
MOQTo adapt to the diverse needs of domestic engineering scattered supplementary orders, batch centralized procurement, and foreign aid foreign trade distribution, national standard crosses set up a tiered flexible MOQ minimum order mechanism, low threshold, high flexibility, suitable for various procurement scenarios. Conventional in-stock standard specifications, including DN15–DN600 mainstream calibers, PN10/PN16/PN25 conventional pressures, 20# carbon steel, 304 stainless
Lead TimeRelying on national standard dedicated automated production lines and super large in-stock warehousing system, national standard crosses provide stable, extremely fast, controllable tiered delivery services, fully matching domestic infrastructure construction periods and foreign trade order timeliness. DN15–DN600 conventional national standard crosses, carbon steel, stainless steel mainstream specifications have sufficient inventory, standard orders complete quality inspection, packaging, loading and shipping within 3 working days, construction site
PackagingNational standard crosses adopt domestic engineering standards + foreign trade export general double-layer protective packaging, taking into account both domestic short-distance transportation and cross-border long-distance sea freight needs, effectively preventing collision, rust, deformation, paint loss, ensuring product delivery in good condition. Small DN15–DN100 national standard crosses, inner layer wrapped with anti-rust oil paper, waterproof PE film double-layer sealed anti-rust, isolating air and moisture to prevent oxidation and rust, outer layer thickened hard cardboard box packaging, box filled with shock-absorbing foam, small pieces individually isolated to avoid friction and scratches. Medium DN125–DN300 specifications, adopt waterproof wrapping + solid wood pallet standardized packing, layered placement, strap fixing, dust-proof film covering, neat and orderly, convenient for warehousing and loading/unloading. Large diameter DN350 and above large national standard crosses, adopt fumigation-free solid wood reinforced wooden boxes
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Applications

  • New construction and renovation/expansion projects of urban water supply and drainage main pipe networks, residential district central heating pipe networks, urban and rural gas transmission pipe networks.
  • Four-way diversion nodes in municipal old pipe network renovation and transformation and urban expansion new pipeline projects.
  • Chemical process fluid pipelines, thermal power plant high-pressure steam pipe networks, oilfield gathering and transportation pipelines and metallurgical cooling pipelines.
  • Occasions such as food and pharmaceutical water treatment industrial pipelines, pressure pipelines supporting new energy equipment, and other applications that have requirements for pipe fitting standards.
  • Project procurement by domestic municipal engineering companies, heating and gas general contracting enterprises, electric power construction contractors, and chemical installation construction units.
  • Factory equipment operation and maintenance departments, industrial park infrastructure procurement, and environmental protection water treatment engineering enterprises for plant pipeline inspection, replacement, and capacity expansion supporting.
  • Wholesalers specializing in national standard pipe fittings, hardware and building materials distributors, and cross-border foreign aid traders purchasing as regular stock.

Purchasing & Delivery

National standard cross fittings are produced according to GB/T12459 and GB/T13401 national standards, and conventional specifications have spot inventory. For DN15–DN600 carbon steel and stainless steel mainstream specifications, standard orders can complete quality inspection, packaging, and loading for shipment within 3 working days; for large-diameter products and products of other materials and pressure ratings, please contact us to confirm production scheduling and delivery arrangements. The minimum order quantity adopts a tiered flexible mechanism; the minimum order threshold for conventional spot standard specifications is relatively low, and both bulk centralized procurement and sporadic replenishment orders can be negotiated. Packaging provides layered protection according to specifications: small specifications use anti-rust oil paper, waterproof PE film, plus hard cardboard boxes; medium specifications use waterproof wrapping plus solid wood pallets; large diameters use fumigation-free solid wood reinforced wooden crates, and the outer packaging is marked with standard, specification, material, batch, net weight and gross weight, and production heat number, facilitating warehousing and traceability. Domestic full-truckload, less-than-truckload logistics, and cross-border sea freight can all be arranged.

Service & Support

We provide procurement customers with selection and after-sales support. Before sale, we can assist in verifying GB parameters, analyzing pipeline network working conditions, and reviewing construction drawings, helping confirm the cross fitting diameter, material, pressure rating, and bevel form. During sale, we can follow up on production progress, quality inspection data, and shipping logistics, and support customers in factory supervision, batch sampling inspection, and factory acceptance inspection. After sale, we provide an 18-month warranty period; during the warranty period, for non-human-caused quality, process, or performance defect issues, we can provide free returns and exchanges and bear logistics loss costs. For welding processes, pipeline network diversion commissioning, and on-site installation adaptation issues, we provide technical Q&A guidance. Long-term cooperative engineering general contractors and distributors can establish order ledgers and enjoy priority production scheduling and emergency after-sales channels.

FAQ

Do national standard cross fittings fully comply with national standards, and can they be used for domestic project acceptance?

The products are produced according to GB/T12459 and GB/T13401 national standards, and dimensions, wall thickness, pressure bearing, and testing standards are implemented according to national standards, and can be used for supervision acceptance of municipal, electric power, chemical, heating, and other projects. If a specific project needs to verify standard clauses or the acceptance document checklist, please contact us to confirm.

Do national standard cross fittings support mixed-batch procurement of both large and small diameters?

We support mixed-batch procurement of all specifications, and they can be purchased together with national standard tees, elbows, flanges, reducers, and other pipe fittings, reducing the number of separate orders and the stocking cycle. For specific mixed-batch combinations and quantities, please contact us for confirmation.

Are large-diameter national standard cross fittings in stock?

Conventional large-diameter cross fittings within DN2000 are usually kept in stock, and can respond relatively quickly to the construction needs of large sites. For non-standard diameters, special materials, or special pressure ratings, please contact us to confirm inventory and production scheduling arrangements.

Can the full set of national standard acceptance documents be provided?

We can provide acceptance documents such as certificates of conformity, material reports, flaw detection reports, and pressure test reports. Products leaving the factory undergo hydrostatic testing, UT nondestructive flaw detection, and spectral re-inspection. For which documents a specific project requires, please contact us for confirmation.

Can national standard cross fittings be customized according to drawings?

We can customize dimensions, reducing ratios, thickened wall thickness, and special end bevels within the DN15–DN2000 range according to customer construction drawings, and can also customize materials and anti-corrosion processes. The sampling cycle is usually 3–5 days. For batch delivery arrangements, please contact us for confirmation.

How can the price and minimum order quantity of national standard four-way be confirmed?

The price needs to be calculated based on specifications, materials, pressure ratings, quantity, and delivery requirements; the page is marked as inquiry. The minimum order quantity adopts a tiered flexible mechanism, and the threshold for conventional in-stock standard specifications is relatively low. You are welcome to provide dimensions, materials, quantity, and delivery location, and we will assist with the quotation.

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