Plastic PVC valve pipe types and characteristics

Summary:PVC pipe features good tensile and compressive strength, but its flexibility is not as good as other plastic pipes, exce...
PVC pipe features good tensile and compressive strength, but its flexibility is not as good as other plastic pipes, excellent corrosion resistance, and the price is the cheapest among all kinds of plastic pipes, but the connection method is more brittle at low temperature Rubber ring connection and flange thread connection are mainly used for water supply and drainage, irrigation, gas supply, exhaust pipes, electrical conduits, rainwater pipes, industrial anti-corrosion pipes, etc. in residential life, industry and mining, and agriculture.
CPVC pipe features excellent heat resistance, thermal deformation temperature of 100 ° C, excellent chemical resistance, excellent connection method bonding, flange thread connection is mainly used for hot water pipes.
PE pipe features light weight, good resistance, good low temperature resistance, non-toxic, low price, high impact strength, but low compressive and tensile strength. Connection method hot melt welding, flange thread connection is mainly used for drinking water Pipes, rainwater pipes, gas pipes, industrial corrosion-resistant pipes.
PP pipe features good corrosion resistance, good strength, high surface hardness, surface finish, and certain high temperature resistance. The connection method is hot melt welding, flange thread connection is mainly used for chemical sewage, seawater, oil and irrigation The pipes are used for indoor concrete floors as heating pipes for heating systems.
ABS pipe features excellent corrosion resistance, lighter weight, and higher heat resistance than PE and PVC, but the price is more expensive. The connection method of bonding and flange thread connection is mainly used for sanitary ware sewer pipes, transportation pipes, sewage pipes, underground cable pipes, high anti-corrosion industrial pipes, etc.
The strength of PB pipe is between PE and PP, and the flexibility is between LDPE (LDPE: low density polyethylene) and HDPE (HDPE: high density polyethylene), and its outstanding features are creep resistance (cold deformation), repeated Continuous winding, excellent temperature resistance and excellent chemical properties. The connection method is hot melt welding and flange thread connection. It is mainly used for water supply pipes, hot and cold water pipes, gas pipes, and underground buried high pipelines. GRP pipes have excellent corrosion resistance and light weight. , High strength, good descriptive function, connection method, socket rubber ring connection, flange connection are widely used in petrochemical pipelines and large-diameter water supply and drainage pipelines.
Description of the identification method of the diameter size of the plastic PVC valve pipe:
The nominal size and nominal pressure of plastic pipes and plastic PVC valves are inconsistent. The nominal size of Fengquan plastic pipes is indicated by the nominal outer diameter dn, and the nominal size of the plastic PVC valve is indicated by the nominal diameter DN; the plastic pipes used for hot and cold water are not allowed to mark the nominal pressure PN, and the pipe series S is marked according to the level of use conditions Select the operating pressure, while the Fengquan plastic PVC valve is marked with the nominal pressure PN, and the temperature grade coefficient fr is used to select the operating temperature.
The operating torque requirements specified in EN 12570:2000 are too low, because the higher the torque of the valve, the greater the wear of the valve seat and the shorter the service life. For plastic PVC valves of domestic manufacturers who have done torque tests, the torque with handle size less than 100 is only about 3N m, which is equivalent to an operating force of only about 30N, which is far lower than the standard value of 250N. Whether the index can be improved, it is also necessary to increase the verification of products from different manufacturers.
The standard does not specify the torque of plastic PVC valve pipes of different specifications. Only the handle length (or handwheel diameter) and force requirements are given, which cannot guarantee the torque quality of valve products, because the manufacturer can lengthen the handle length ( or handwheel diameter) method to make non-conforming products into qualified products.
The design stress 6S of PP-R is 5MPa, and the design stress 6Ss of some raw materials in the world has been increased to 6.3MPa or 8MPa. The choice of design strength is somewhat conservative compared to other raw material varieties.
The minimum diameter of the reducing valve does not give quantitative requirements for the minimum size of different specifications, only the manufacturer is required to indicate it. This makes some manufacturers' products with excessive valve diameter reduction appear compact compared to products of the same specification, but it will increase the local resistance of the pipeline system.
The standard gives the design life requirements for plastic valves used for industrial fluid transfer, but does not give the design life time for domestic water supply systems. As long as the selection of raw materials and product control are carried out in accordance with international standards, plastic PVC valve pipes can fully meet the requirements of use. At the same time, there are some inappropriate points in international standards, and we need to pay attention to their development trends.


  Material: PVC Pipe

  Kind: Thermoplastics Pipes

  Water Absorption: <0.01%

  Contraction Percentage: <0.4%

  Tensile Strength: (51~80)MPa

  Pressure Rating: Pn10

  Model NO.: DN15-DN400

  Temperature Classification: Medium Temperature Piping

  MPa Classfication: Low Pressure Piping

  Medium: Liquid

  Hardness: Hard Tube

  Type: Thermoplastic Pipe

  Color: Color

  Hollow: Hollow

  Usage: Chemical

  Cross-Section Shape: Round

  Connection Type: Welding

  Standard: ASTM, GB, DIN, JIS

  Trademark: Baodi

  Transport Package: Plasic film

  Specification: DN: 15-400mm

  Origin: China

  HS Code: 3917230000

  A. Connection: Socket welding

  B. Head Code: Square

  C. Material: Plastic-UPVC,CPVC,FRPP,PPH,PVDF

  D. Shape: Equal

  E. Place of Origin Zhejiang China

  F. Brand Name: Baodi