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Help CenterSteel Pipe & Tube & Cast Pipe，QT400‑18、QT500‑7、HT250、LX345
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Cast Pipe is a special pipe manufactured by integral centrifugal casting process. Different from rolled seamless pipe and welded steel pipe, Cast Pipe features dense and uniform metallographic structure, outstanding compression‑resistance, wear‑resistance, impact‑resistance and corrosion‑resistance, with high integrity free of weld defects. It delivers prominent advantages of high pressure bearing capacity, anti‑settlement property, earthquake resistance and long service life. It solves common pain points of ordinary steel pipes such as underground corrosion, weld failure and insufficient resistance to foundation settlement, serving as an important pipe material for municipal water supply & drainage, gas transmission, mine slag discharge, chemical fluid conveyance and large‑scale steel‑structure columns. Cast Pipe is mainly divided intoCentrifugal Cast Pipe and Ductile Iron Cast Pipe. Different materials and processes of Cast Pipe adapt to municipal water supply‑sewage, gas transmission, mine medium transportation, chemical process pipeline, steel‑structure large cast‑pipe column, underground pipe network and other working conditions. With complete specifications and grades and full original‑mill quality certificates available, Cast Pipe supports flange joint, flexible socket‑spigot joint, anti‑corrosion lining, outer coating spraying and dimension‑customization deep‑processing services. Featuring excellent comprehensive mechanical properties, good toughness and foundation‑settlement resistance, Ductile Iron Cast Pipe is the most versatile Cast Pipe, widely adopted in municipal buried water‑supply, sewage and gas engineering projects. Made of cast‑steel or heat‑resistant alloy, Centrifugal Cast Pipe withstands high temperature & high pressure, suitable for chemical industry, furnace tube and heavy‑duty industrial pipeline scenarios. Conventional nominal diameter of Cast Pipe ranges DN80‑DN2600mm, wall thickness 6‑30mm, standard single‑piece length 3‑6m. Main grades include QT400‑18, QT500‑7, HT250, LX345 cast steel, heat‑resistant alloy. Delivered in as‑cast state with optional cement lining, epoxy coating and bitumen anti‑corrosion treatment. Every piece passes hydrostatic test, visual inspection and material‑composition full inspection before delivery. All Cast Pipe comply with GB/T13295‑2019, JG/T300‑2011 national standards as well as ISO2531, EN545, ASTM A74 foreign‑trade standards. Enterprises for municipal engineering, water‑gas utility, mine & chemical industry can select Centrifugal Cast Pipe and Ductile Iron Cast Pipe according to conveyed medium, buried‑site condition and pressure grade, giving full play to advantages of integral casting, corrosion‑resistance & settlement‑resistance and stable service performance of Cast Pipe, ensuring long‑term service of underground pipe‑networks and industrial pipelines.
1. Material Grade & Model
Common Cast Pipe Grades: QT400‑18, QT500‑7, HT250, LX345 Cast Steel, HK40 Heat‑Resistant Alloy
Ductile Iron Cast Pipe Models: DN80‑DN2600mm, wall thickness 6‑30mm, available for flexible socket‑spigot joint, flange joint, cement lining and bitumen external anti‑corrosion, suitable for municipal water supply, sewage discharge and gas buried pipe‑networks;
Centrifugal Cast Pipe Models: DN100‑DN1800mm, cast‑steel / heat‑resistant alloy material, available for epoxy coating and special anti‑corrosion lining, suitable for mine slag‑discharge pipeline, chemical medium pipeline, high‑temperature furnace tube and steel‑structure cast‑pipe columns; All grades comply with GBT13295‑2019, JG/T300‑2011 national standards, also satisfying ISO2531, EN545 and ASTM A74 foreign‑trade standards. Customization for coating and joint type is supported, and full‑set original‑mill quality documents can be provided.
2. Product Grades and Classification
- Ductile Iron Cast Pipe: Spheroidal graphite microstructure combining cast‑iron corrosion resistance and steel‑grade high toughness, resisting foundation settlement and earthquake, widely used for water‑gas buried pipe‑networks
‑ Centrifugal Cast‑Steel Pipe: Formed by centrifugal pouring without weld seam, high strength & impact resistance, for steel‑structure columns and heavy‑duty industrial pipelines
‑ Centrifugal Heat‑Resistant Alloy Cast Pipe: High‑temperature oxidation resistance, applied for heating furnaces and petrochemical cracking furnace high‑temperature pipelines
‑ Grey Iron Cast Pipe: HT250 grade with high cost‑performance, for low‑pressure drainage & sewage working conditions
‑ Compliance Standards: GB national standard, ISO international standard, EN European standard, ASTM American standard, suitable for domestic municipal infrastructure and import‑export trade orders
3. Execution Standards
- GB/T 13295‑2019 Ductile iron pipes, fittings and accessories for water and gas
‑ JG/T 300‑2011 Centrifugal cast steel pipes for building structures
‑ ISO 2531 Ductile iron pipes for water and gas applications
‑ EN 545 Ductile iron pipes, fittings and accessories for water applications
‑ ASTM A74 Standard specification for cast‑iron pressure pipes
‑ Original mill certificates, hydrostatic‑test reports and non‑destructive‑testing reports are available, supporting SGS/BV third‑party authoritative inspection & acceptance.
4. Core Specifications and Parameters
Cast Pipe ‑ Ductile Iron Cast Pipe: Nominal diameter DN80‑DN2600mm; Wall thickness 6‑30mm; Single‑piece length 3‑6m; Ductile iron substrate; for municipal water supply, sewage discharge and gas‑transmission buried pipe‑networks;Cast Pipe ‑ Centrifugal Cast Pipe: Nominal diameter DN100‑DN1800mm; Wall thickness 8‑30mm; Single‑piece length 3‑6m; Cast‑steel / heat‑resistant alloy substrate; for mine slag‑discharge pipelines, chemical fluid conveyance, high‑temperature furnace tubes and large‑scale steel‑structure columns; Full‑series Cast Pipe supports socket‑spigot joint, flange joint, cement lining, epoxy spraying, bitumen anti‑corrosion and dimension‑customization deep‑processing.Ductile Iron Cast Pipe features stable supply, excellent anti‑corrosion & toughness performance and sufficient spot resources, suitable for mass‑volume municipal water‑gas engineering projects;Centrifugal Cast Pipe delivers dense weld‑free integral structure, high temperature & impact resistance, meeting service requirements of heavy‑duty and high‑temperature harsh industrial working‑conditions.
5. Classification & Performance Characteristics
- Ductile Iron Cast Pipe: Formed by centrifugal pouring with spheroidal graphite microstructure. It owns high toughness, bending resistance and resistance to uneven foundation settlement. Matched with flexible joints to adapt geological deformation, it can be equipped with internal‑external anti‑corrosion coating & lining for long buried service life, widely used for urban water‑gas underground pipe‑networks.
- Centrifugal Cast Pipe: Molten metal crystallizes under centrifugal force, forming integral pipe free of welding seams with dense metallographic structure, outstanding pressure‑resistance, impact‑resistance and high‑temperature resistance. Cast‑steel grade applies for steel‑structure columns; alloy grade serves for high‑temperature industrial furnace tubes and chemical pipelines.
- Delivery State: as‑cast blank or finished product; cement lining, epoxy coating, bitumen anti‑corrosion, flange machining and socket‑spigot joint treatment are optional; ‑ Both Ductile Iron Cast Pipe and Centrifugal Cast Pipe support customized production of nominal diameter, wall thickness, coating and joint form according to project drawing requirements.
6. Main Applications
Cast Pipe is integral‑molded special pipe for municipal infrastructure and heavy‑industry sectors, extensively used for urban municipal water‑supply‑drainage pipe‑networks, gas‑transmission pipelines, mine slag‑discharge conveyance, chemical‑medium pipelines, high‑temperature industrial furnace tubes, large‑scale steel‑structure cast‑pipe columns and rain‑sewage pipe‑networks. Ductile Iron Cast Pipe is mainly applied in buried water‑supply, sewage and gas engineering with settlement‑resistance and corrosion‑resistance performance, being the most‑consumed Cast Pipe in municipal infrastructure projects. Centrifugal Cast Pipe is mostly used for mine, chemical industry, high‑temperature furnace and large‑scale steel‑structure projects, ensuring pipeline safety relying on weld‑free integral structure, high strength and high‑temperature‑resistance performance. Enterprises for municipal water‑utility, gas, mine‑chemical and steel‑structure construction can select products accurately according to buried condition, conveyed medium, temperature and pressure grade. Relying on complete specifications, full certificates and stable mass supply of Cast Pipe, later‑stage pipe‑network maintenance & replacement cost can be reduced and long‑term safe operation of engineering projects guaranteed.
7. Packing, MOQ & Lead Time
- Packing: Cast Pipe stacked piece by piece, pipe ends fitted with protective rubber rings, pipe body marked with specification & grade info, pipe orifice well‑protected for long‑distance sea and land transportation;
- MOQ: 10 tons minimum order quantity, mixed ordering of Ductile Iron Cast Pipe and Centrifugal Cast Pipe supported, small sample orders and large‑scale municipal‑industrial bulk procurement acceptable;
- Lead Time: 5‑7 days for regular in‑stock specifications; 7‑15 days for customized special diameter, special alloy and special‑coating orders.
Full‑set material, hydrostatic‑test and NDT‑inspection certificates are supplied together with goods, supporting third‑party inspection and applicable to FOB, CIF, DAP and other foreign‑trade terms.
8. Product Advantages
Cast Pipe is integrally centrifugal‑cast without welding seams, eliminating risk of weld cracking & leakage, delivering higher reliability under buried conditions compared with ordinary steel pipes;
2. Ductile Iron Cast Pipe owns excellent toughness, anti‑settlement & earthquake‑resistance performance. Equipped with flexible joints, it adapts to complex‑geology buried water‑gas projects;
3.Centrifugal Cast Pipe features dense structure, strong pressure & impact resistance, with optional cast‑steel and alloy grades to satisfy harsh working‑conditions of mine, chemical industry and high‑temperature furnace tubes;
4. Full‑series Cast Pipe passes piece‑by‑piece hydrostatic test, visual inspection and non‑destructive‑testing with traceable materials, delivering stable large‑volume supply capacity for domestic infrastructure and overseas municipal‑industrial projects.
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