Dalian Xuan's cast iron pipe cast iron pipe cast iron pipe latest price

A cast iron drainage pipe varieties and classification 1, from the piping system structure, cast iron drainage pipe can be divided into three categories straight pipes, fittings, accessories. Straight is the main component of the piping system; a wide variety of pipe fittings to achieve the drainage system function Assurance (pooled, steering, air, closed water breath, energy dissipation ease the pressure, check wrecker, etc.); accessories mainly from the connection, seal effect. 2, from the interface form, cast iron drainage pipe and rigid flexible interface can be divided into two major categories of interfaces. Flexible interface drainage has strong anti-flexing, stretching deformation and seismic capacity, has broad applicability. When the lack of rigidity to radial deflection of an interface drain, axial stretching ability to use process by building deformation, thermal expansion and contraction, vibration and other external forces geology, easy to produce pipe rupture, resulting in leakage accident, it has been gradually phased out only in some low-rise buildings or special occasions. 3. From the connection interface, flexible interface cast iron drainage pipe can be divided into no socket W (commonly known as clamps), mechanical flange type A (double) flange mechanical type B, flexible socket type other four. The four flexible interface drainage pipes are widely used in different countries and regions, currently the more commonly used is the W, A-type, B-type three. W-type pipe with a small radial dimension (Flanges), easy layout, save space, the length of the sleeve can be cut in the field as needed to save the pipe, easy disassembly for easy maintenance and replacement, etc. A type of pipe interfaces with high strength, good sealing, strong seismic performance advantages. Double flange (B type) combines the W-type straight pipe length CD sets on demand, the advantages of high strength Type A connector, and gradually accepted by the market and choose. Flexible socket type pipe with moderate radial dimension, easy installation, strong seismic performance advantages, and accessories for the manufacture of precision accuracy, high quality requirements. There is not yet a flexible plug-type product, it should serve as a key manufacturing enterprises in future product development. 4, from the manufacturing, molding methods, straight tube can be divided into the mechanism, manual foundry two categories, of which the mechanism can be divided into metal centrifugal casting, continuous casting two. Fittings can be divided into mechanical modeling, handmade foundry two categories. Metal type centrifugal casting with a dense, smooth surface, uniform thickness, dimensional stability and high production efficiency, the vast majority of enterprises to adopt production methods; continuous casting straight poor surface quality of some of the low productivity; hand-foundry tube disadvantage many defects, are out of the market products. Mechanical modeling production of pipe size uniformity, consistency, dense, is the trend of cast iron drainage pipes, manual pipe foundry is still a low-cost advantage, so most companies in the country to adopt. Second, the main features of cast iron drainage pipe compared to other metal pipe and plastic pipe, cast iron drainage pipe has some unique advantages, mainly in the high-intensity, low noise, long life, fire retardant, flexible shock, no secondary pollution renewable recycling and other aspects. 1, low noise, high strength, long life drain water was not filling and gravity flow state, friction, shock, vibration, noise is inevitable. Graphite cast iron can have a dampening effect on the vibration and prevent vibration energy transfer between the grain and convert vibration energy into thermal energy. So, cast iron pipe has good noise damping properties. Experimental data indicate that, DN100 pipeline flow 2.7L / s, the cast iron pipe noise is 46.5dB, U-PVC pipe noise is 58dB, it is asking a quiet residential building, schools, hospitals, venue, hotels and other occasions , should use cast iron drainage pipe. Cast iron tensile, bending strength is more than four times the usual PVC plastic pipe. Potential difference between cast iron matrix microstructure small, electrochemical action, while the high silicon content, it is possible SIO2 continuous surface protection film, so its performance is far higher than the corrosion-resistant steel, cast iron in the same environment, media rust resistance is three times more than steel. Cast iron drainage pipe excellent corrosion resistance, strength characteristics, making life much greater than steel and plastic tubing. 2, linear expansion coefficient flexible seismic cast iron is relatively low, and thus subject to the ambient temperature itself produces a small amount of stretch, while flexible interface structure of cast iron drainage pipe, it has a high resistance to stretching, flexing deformation and seismic capacity The system axial deformation 35mm, 31.5mm lateral vibration deflection values ??within the interface does not leak. 3, high temperature, fire retardant drains have run through, connecting the floor, characteristic of the room in case of fire should the drainage pipe fusible, flame retardancy is poor, soon melted, ruptured, will form a chimney effect. Cast iron pipe retardant and high melting point make it a good fire retardant. 4, no secondary pollution, renewable recycled cast iron itself does not contain toxic chemicals, no secondary pollution of sewage, waste water and drainage pipes when building or dismantling scrap, cast iron drainage pipe can be 100% recycled , recycling.