Polyvinyl Chloride (PVC) is an amorphous thermoplastic material that can be formulated or "compounded" to target a specific application. Minor ingridients must be blended with PVC resin to create a PVC compound that is processable into a finished product. The physical properties of PVC can be altered considerably to provide desirable properties by compounding techniques. Additives such as impact modifiers, stabilizers, lubricants, processing aids, pigments and other ingridients can be modified to obtain desirable properties. As such, PVC is available in a wide range of products from flexible tubing, film packaging materilas, and vinyl siding, through various blends that can be used to produce rigid PVC pressure piping.
Harvel Plastic, Inc. blends its own PVC compounds that are optimized specially for Harvel’s quality line of rigid PVC piping products. Harvel utilizes several different PVC compounds formulated specifically for the production of different PVC product lines. This ensures tight control over consistency and quality in the end product, which has been optimized for chemical resistance and pressure bearing capability. Harvel PVC materials are listed by NSF International to NSF STD 61, toxicology, as being safe for use in potable water applications. ASTM Standard D1784, Standard Specification for rigid polyvinyl Chloride (PVC) compounds and chlorinated (polyvinyl Chloride) (CPVC) compounds calls out minimum physical property requirements of compounds that are used in the production of PVC pipe and fittings. This standard classifies the physical properties through a “Cell Classfification” system that calls out base resin, minimum impact strength, tensile strength, modulus of elasticity, heat deflection temperature under load, and flammability when tested per applicable ASTM standards. Unplasticized or rigid PVC compound used for the manufacture of pipe and fittings, has a Cell Classification of 12454 per ASTM D1784, and is also known as Type I Grade I PVC or PVC 1120. Refer to Physical Properties section, Chemical Resistance Data, and Industry Standards & Test Methods section for additional information.
PVC Cell Classification 12454 = PVC Type I, Grade I = Rigid (unplasticized) PVC = PVC 1120 = H707 PVC (Harvel tradename)
Harvel® PVC Product Line
Schedule 40, Schedule 80 & Schedule 120 PVC Pressure Pipe SDR Series Pressure Pipe (SDR 13.5, SDR 21, SDR 26 & SDR41)
Harvel Clear™ PVC Schedule 40 & Schedule 80 Pipe
PVC Machining Shapes (solid bar, hollow bar, angle and other machine stock)
Harvel LXT® Ultra-Pure Water Piping
Custom Dimensions and Colors
Although PVC and CPVC are similar in nature they are not the same. Care should be used when investigating chemical resistance, joining/fabrication techniques, and service applications. Harvel utilizes several different PVC and CPVC compounds for the production of different product lines. Different compounds may exhibit slight variations in actual physical properties and resultant cell classifications as compare to those stated. Contact Harvel Tech Services for additional information if necessary.
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