Ordinary steel pipe: Used for production and fire water supply pipelines, drainage branch pipes of sanitary appliances and non-corrosive production drainage branch pipes of production equipment, rainwater pipelines in industrial plants. High strength, convenient joints, large internal pressure bearing capacity, smooth inner surface, good hydraulic conditions. Prone to corrosion, relatively high cost. Welding, flange connection.
Steel-lined plastic composite pipe: Can be used not only for water supply but also for conveying corrosive liquids; S/PP applicable temperature: -25～+100℃, S/PE applicable temperature: -25～+70℃, S/PVC applicable temperature: -25～+65℃. A high-performance anti-corrosion pipe with strong anti-corrosion wear resistance and good strength and anti-aging performance. Thicker pipe walls, limited pressure bearing capacity, special requirements for processing and installation. Special pipe fittings thread connection, flange connection.
Galvanized steel pipe (hot-dip): Fire system and production water supply pipelines with diameters less than or equal to 150mm. High strength, convenient joints, large internal pressure bearing capacity, smooth inner surface, good hydraulic conditions. Prone to corrosion, relatively high cost. Thread connection, flange connection.
Bimetallic composite pipe: Specifically suitable for domestic cold and hot water pipes. Hygienic, non-toxic, heat-resistant, pressure-resistant, easy installation, low pipeline resistance, stainless steel composite pipe, good mechanical properties, wide direct range of pipelines. Complex welding process, the inner and outer composite layers should not be damaged, otherwise the galvanized pipe effect will appear. Special welding, flange connection, coupling type threaded connection, fitting connection.
Stainless steel pipe: Conveying pure water, corrosive production sewage. Beautiful appearance, corrosion-resistant, non-permeable, good air tightness, smooth inner wall, light weight, easy installation, high pressure resistance, vibration resistance. Not easy to construct, expensive. Compression type, tightening type, push-in type (flexible type), taper thread type, quick-connect flange type, flange type, screw type, socket type.
Stainless steel lined plastic composite pipe: Specifically suitable for domestic cold and hot water pipes. Beautiful appearance, corrosion-resistant, non-permeable, good air tightness, smooth inner wall, light weight, easy installation, high pressure resistance. High price of stainless steel material. Groove clamp type, sealing bonding type, etc.
Steel pipe (purple copper, brass): Hot water pipeline. Good corrosion resistance to fresh water, high mechanical strength, strong flexibility, easy processing, smooth inner surface, not easy to scale, beautiful. Thin pipe wall, easy to damage. Thread connection, flange connection, welding, special pipe fittings.
Aluminum alloy lined plastic composite pipe: Specifically suitable for domestic cold and hot water pipes. Beautiful appearance, thermal insulation, corrosion-resistant, non-permeable, good air tightness, smooth inner wall, light weight, easy installation. Outer layer susceptible to acid and alkali corrosion, fittings are external joints, not conducive to concealed installation. Special clamping type, flange plate type connection.
Non-metallic pipe:
Rubber pipe: Mobile, temporary pipelines. Corrosion-resistant, vibration-resistant, noise-reducing, convenient joint. Large water flow resistance, low pressure resistance. Flange connection, strap connection.
Concrete pipe, reinforced concrete pipe: Large and medium-sized outdoor water transmission pipelines. Cheap price, stainless steel lined composite pipe after treatment has good corrosion resistance. Heavy weight, difficult construction, accessories prone to damage. Concrete pipes use rubber ring and band joints, reinforced concrete pipes use rubber ring joints.
Plastic pipe:
Glass fiber reinforced plastic pipe: Suitable for large and medium-sized outdoor water transmission pipelines with strong geological corrosion. Thermal insulation, corrosion-resistant, smooth inner wall. High joint requirements, prone to leakage, difficult to construct, expensive. Double socket sleeve joint connection, socket joint connection, flange, flexible steel joint, mechanical steel joint or multi-function live joint.
Aluminum-plastic composite pipe: Used for domestic cold and hot water pipes. Composite pipes with inner and outer plastic layers made of cross-linked polyethylene can be used for hot water pipes, operating temperature up to 90℃. Flexible pipe material, thermal insulation, corrosion-resistant, non-permeable, good air tightness, smooth inner wall, light weight, easy installation. Limited strength, easy to damage, more support fixation required, restricted beauty, uneven thickness of pipe walls. Aluminum alloy self-locking tight seal pipe fittings. When using plastic seal sleeves, water temperature does not exceed 60℃; when using aluminum seal sleeves, water temperature does not exceed 100℃.
Water supply UPVC: Suitable for domestic water supply (cold). Corrosion-resistant, smooth inner wall, not easy to scale blockage, good hydraulic conditions, lightweight, easy installation. In sunlight, it is not easy to age, low heat resistance, high technical and condition requirements for construction. Hard texture, cheap, easy to bond, flame retardant. Not impact resistant, poor durability, high technical requirements for joint bonding, longer curing time. Socket bonding, plastic welding, special accessory flange connection, threaded connection.
HDPE: Good toughness, better fatigue strength, good low-temperature performance, good flexibility and impact resistance. Fusion requires electricity, large mechanical connection parts, flammable. Electric heat fusion, heat fusion butt welding and heat fusion socket connection, stainless steel lined composite pipe, special accessory thread connection, flange connection, welding, etc.
ABS: Large strength, impact-resistant, can be directly threaded, good health performance suitable for pure water conveyance. Longer bonding curing time, flammable. Mainly socket connection, also flange connection and threaded connection of special accessories.
PP-R: Suitable for domestic (cold) hot water. Good temperature resistance, recyclable, green environmental protection product, good health performance suitable for pure water conveyance. Under the same pressure and medium temperature conditions, thicker pipe walls, flammable. Mainly electric heat fusion, heat fusion butt welding, also flange connection and threaded connection of special accessories.
PP-C: Good temperature resistance, good health performance suitable for pure water conveyance. Expensive price.
PEX: Good temperature resistance, good creep resistance, good memory, easy to correct. Can only be connected with metal parts, cannot be recycled and reused. Special metal connector clamp type, clamp type connection and threaded connection.
CPVC: Best temperature resistance, good aging resistance, good flame retardancy. High price, only suitable for hot water systems. Socket bonding, plastic welding, flange connection of special accessories, threaded connection.
PB: Good temperature resistance, good tensile and compressive strength, impact-resistant, low creep, high flexibility. Under the same pressure and medium temperature conditions, thinnest pipe walls belong to green products. No PB resin raw materials domestically yet, dependent on imports, high price, flammable. Mainly electric heat fusion, heat fusion butt welding, also rubber ring sealing butt connection can be adopted.
PPPE pipe: Suitable for indoor water supply in residential buildings and public buildings. Wide temperature range, high pressure resistance, under the same bearing pressure conditions, smaller pipe walls, low price, connection handling metal inserts with valves, faucets, and water meters. Limited varieties, specifications, and output. Heat fusion connection, threaded connection.
Nanometer polypropylene pipe (NPP-R): Especially suitable for drinking water pipeline water transfer projects. Corrosion-resistant, easy installation, chemical composition of precision steel pipe includes carbon C, silicon Si, manganese Mn, sulfur S, phosphorus P, chromium Cr, smooth inner wall, not easy to accumulate scale blockage, lightweight direct concealment, 100% sterilization function, dense impact resistance, green product. High cost, limited output. Heat fusion plug-in, special accessory threads.