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Help CenterSteel Pipe & Tube & Cast Pipe，QT500-7、QT600-3、HT200、HT250
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1. Product Overview
Cast Pipe is a special industrial pipeline formed by pouring molten iron through professional casting processes. Adopting mature centrifugal casting and static casting technologies, Cast Iron Pipe features compact structure and excellent integrity. Different from welded and rolled pipes, it has no welding seam hidden dangers and serves as a core material for municipal engineering and industrial fluid transportation. Industrial Cast Pipeline possesses high strength, high rigidity, outstanding corrosion resistance and impact resistance, enabling long-term stable operation under complex working conditions including deep underground burial, alternating high and low temperatures, medium corrosion and high-pressure fluid delivery. Cast Pipe has far superior overall stability compared with ordinary pipes, featuring deformation resistance, damage resistance and ultra-long service life. Widely used to replace ordinary steel pipes and plastic pipes in key infrastructure projects,Cast Iron Pipe and Industrial Cast Pipeline are indispensable basic pressure-bearing pipes for water supply and drainage, gas, chemical and thermal industries.
2. Execution Standards
✅ National Core Standard: GB/T 13295-2019 Ductile Iron Pipes, Fittings and Accessories for Water and Gas Pipelines
✅ Building Drainage Standard: CJ/T 177-2002 Clamp-Type Cast Iron Pipes and Fittings for Building Drainage
✅ Testing Standards: Hydrostatic pressure test, visual non-destructive testing, wall thickness tolerance test, anti-corrosion coating adhesion test
All Cast Pipe, Cast Iron Pipe and Industrial Cast Pipeline are manufactured strictly in accordance with national infrastructure pipe standards. Their mechanical properties, pressure bearing grades and anti-corrosion indicators are fully compliant, meeting the requirements of domestic project acceptance, municipal bidding and foreign trade export certification.
3. Product Classification and Applicable Working Conditions
3.1 Classification by Casting Process
Centrifugal Cast Pipe: As the mainstream Cast Pipe, it is formed by high-speed centrifugation with uniform wall thickness, compact structure and few pores and impurities. This Cast Iron Pipe delivers excellent pressure resistance and sealing performance. It is the most widely used type of Industrial Cast Pipeline, suitable for high-pressure water supply, gas transportation and long-distance pipe network projects.
Continuous Cast Pipe / Static Cast Pipe: A customized Cast Pipe available for large-diameter and special-shaped wall thickness pipes. The Cast Iron Pipe features stable molding performance, suitable for large-flow drainage, chemical waste liquid transportation and supporting pipelines for large-scale equipment. Industrial Cast Pipeline of this type is mostly applied in non-standard customized engineering projects.
3.2 Classification by Material Model (Mainstream Material Specifications)
1. QT500-7 Ductile Iron Cast Pipe: The mainstream general-purpose material model in the market with balanced toughness, strength and ductility. It has a tensile strength ≥ 500MPa and elongation ≥ 7%, with excellent anti-settlement and impact resistance. It is the most commonly used Cast Iron Pipe for municipal water supply, gas pipelines and deep-buried pipe networks, and the preferred material for conventional Industrial Cast Pipeline projects.
2. QT600-3 High-Strength Ductile Iron Cast Pipe: A high-strength material model with a tensile strength ≥ 600MPa, higher rigidity and stronger compression bearing capacity. It adapts to harsh working conditions such as road heavy load, high soil cover and high-pressure water delivery. This type of Cast Pipe is mostly used in key municipal projects and long-distance main pipe networks, serving as the core material for high-load Industrial Cast Pipeline.
3. HT200 Grey Cast Iron Pipe: A classic economical material model with compact texture, vibration damping, wear resistance, corrosion resistance and low cost and stable performance. This Cast Pipe is applicable to low-pressure and non-impact working conditions, widely used in building drainage, residential rainwater and sewage diversion, ordinary factory sewage discharge and other conventionalIndustrial Cast Pipeline scenarios.
4. HT250 Wear-Resistant Grey Cast Iron Pipe: An upgraded grey iron material model with higher hardness and wear resistance than HT200, featuring stronger scour resistance and anti-scaling performance. It is specially designed for fluid transportation containing sewage and impurities. ThisCast Iron Pipe effectively prolongs the service life of Industrial Cast Pipeline under corrosive and scouring working conditions.
Ductile Iron Cast Pipe: A high-performance Cast Pipe modified by adding nodulizer to molten iron, combining the rigidity of iron and toughness of steel. It features high tensile strength, bending resistance and settlement resistance. As the preferred Industrial Cast Pipeline for municipal core pipe networks, this Cast Iron Pipe adapts to complex geology and heavy-load deep burial working conditions.
Grey Cast Iron Pipe: An economical Cast Pipe with vibration damping, wear resistance, corrosion resistance and high cost performance. Featuring simple molding process and stable performance, Cast Iron Pipe is widely used in ordinary building drainage, residential rainwater and sewage diversion and low-pressure water delivery scenarios as Industrial Cast Pipeline.
3.3 Classification by Pressure Bearing Grade
Conventional grades include K9, C25, C30 and C40 series Cast Pipe. Different grades of Cast Iron Pipe correspond to different pressure bearing standards, andIndustrial Cast Pipeline can meet low, medium and high-pressure fluid transportation requirements of all working conditions.
4. Specification Parameters
Nominal Diameter: Complete series from DN80–DN2600mm, customized extra-large diameter available
Conventional Wall Thickness: 8mm–30mm, thickened wall can be customized according to pressure bearing requirements
Standard Length: Regular fixed length of 6m; non-standard lengths of 4m, 9m and 12m can be customized and processed
Joint Type: T-type flexible joint, self-anchored joint, clamp joint, flange joint, easy to install with tight sealing performance
Anti-Corrosion Technology: Inner wall cement mortar lining / epoxy resin anti-corrosion; outer wall zinc coating + asphalt paint / polyurethane anti-corrosion for long-term rust and corrosion resistance
All series of Cast Pipe support customized tolerance, anti-corrosion coating and joint styles. Cast Iron Pipe features precise dimensions, and Industrial Cast Pipeline fully complies with various engineering installation standards.
5. Core Performance Advantages
1. Stable structure without hidden dangers:Cast Pipe is integrally cast without welding seams, achieving uniform pressure bearing and completely avoiding weld cracking and leakage risks. Deep-buried Cast Iron Pipe is not easy to be damaged, and Industrial Cast Pipeline maintains extremely stable operation.
2. Excellent toughness and strength: High-end ductile iron Cast Pipe resists tension, bending and ground settlement, free from deformation under heavy rolling and brittle fracture at low temperatures. Cast Iron Pipe adapts to harsh outdoor working conditions, and the service life of Industrial Cast Pipeline can exceed 50 years.
3. Superior corrosion and wear resistance: Cast Pipe adopts professional double-layer anti-corrosion technology, resisting acid, alkali, sewage corrosion and soil electrochemical corrosion. The smooth inner wall reduces flow resistance and prevents scaling and blockage. Cast Iron Pipe ensures high fluid transmission efficiency, and Industrial Cast Pipeline requires extremely low later operation and maintenance costs.
4. High sealing safety factor: Cast Pipe adopts flexible sealing joints, adapting to slight foundation settlement and thermal expansion and cold contraction of pipelines to avoid water and gas leakage. Cast Iron Pipe has better sealing performance than ordinary pipes, and Industrial Cast Pipeline achieves an ultra-low operational failure rate.
5. Wide construction adaptability: Cast Pipe has moderate weight with convenient installation, cutting and docking. It supports conventional open-cut construction and trenchless pipe jacking construction. Cast Iron Pipe adapts to various construction scenarios and improves the project implementation efficiency of Industrial Cast Pipeline.
6. Eco-friendly and maintenance-free: Cast Pipe is non-toxic and pollution-free, no impurity breeding and water pollution, suitable for drinking water transportation. Cast Iron Pipe resists aging and weathering, and Industrial Cast Pipeline requires no frequent maintenance during long-term operation.
6. Main Application Fields
Cast Pipe is widely used in various infrastructure and industrial fluid transportation scenarios. Cast Iron Pipe serves as the core material for municipal engineering, and Industrial Cast Pipeline supports core equipment matching in multiple industries. In municipal engineering, Cast Pipe is applied to urban tap water pipe networks, fire-fighting pipe networks, rainwater and sewage pipe networks, gas transportation pipe networks and urban-rural water transfer projects. In industrial fields, Cast Iron Pipe is used for chemical waste liquid transportation, thermal pipe networks, power plant reclaimed water transportation and mine fluid transportation. In construction fields, Industrial Cast Pipeline is used for high-rise building drainage, residential water supply and drainage, and factory sewage and water transmission. It is also widely applied in water conservancy projects, sewage treatment plants, pipe network upgrading and other key projects.
7. Supporting Services and Delivery Cycle
Every batch of supplied Cast Pipe is equipped with original factory quality certificates, including complete data of material testing, hydrostatic test and anti-corrosion detection. Third-party testing reports issued by SGS and BV can be provided for Cast Iron Pipe on demand. Complete documents ofIndustrial Cast Pipeline meet the requirements of project acceptance, bidding and export customs clearance. Deep processing services such as pipe cutting, beveling, joint customization and anti-corrosion coating repair are available. Products are fixed with steel frames and wrapped with waterproof materials, suitable for long-distance transportation by highway, railway and sea without collision damage.
Delivery Cycle: Standard specifications DN80-DN1200 and conventional K9-grade in-stock Cast Pipe and spot Cast Iron Pipe can be delivered within 3–7 working days. Large-diameter DN1400-DN2600, thickened wall, special anti-corrosion and non-standard customizedIndustrial Cast Pipeline have a production and delivery cycle of 15–25 working days. Priority production and urgent delivery can be arranged for urgent orders.
Trade Modes: Domestic spot wholesale, bulk engineering customization, FOB port and DAP door-to-door foreign trade orders are all supported with full-process supporting docking services.
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