Our site uses cookies necessary for its proper functioning. To improve your experience, other cookies may be used: you can choose to disable them. This can be changed at any time via the Cookies link at the bottom of the page.

Effect of Elevated Temperature on Stress-Rupture Testing of Low Inherent Viscosity PVC Resins



Standards & Specs # 2006 Washington DC

Stress-rupture testing is generally performed on pipe and fitting compounds designed for pressure applications. Per PPI TR-2, the PVC resin in the compound formulation is required to have an inherent viscosity (IV) of 0.88 or greater and is sometimes referred to as ‘pipe grade’ resin. These compounds obtain a hydrostatic design basis (HDB) rating at 73oF (23oC) per ASTM D2837 and have a maximum recommended service temperature of 140oF (60oC). PVC compound made from lower inherent viscosity resin (IV generally between 0.65 and 0.88 also called ‘fitting grade’ resin) are used primarily in the manufacture of fittings and are not required to undergo stress-rupture testing. The primary objective of this study is to verify that stress-rupture testing can be performed on a fitting grade resin at the maximum recommended service temperature (60oC) without the development of a knee. The secondary objective is to compare the effect of the outside testing environment (air bath versus water bath) when testing at elevated temperature. Testing is therefore performed per ASTM D2837 on pipe specimen molded from a fitting grade resin at four different conditions : two different temperatures (23oC and 60oC) in two different outside environments (air bath and water bath).

Please note that the whole article content is available on PPCA website only

Related papers

2001 Munich : A Method for Assessing the Long-Term Strength of Unplasticized Poly Fittings

Author(s) : Paschal, Ciechanowski

Fittings used in water and gas piping systems are rarely, if ever, explicitly rated for load carrying capability relative to internal pressure. In some cases the material or resin used to manufacture the fitting is stress-rated to a period of 100,000 hours (PPI TR3) or 50 years (ISO TR 9080 and FDIS 9080). This...

Members of the Association

BOREALISBOROUGEFormosa Plastics CorporationINEOS O&PIRPCKazanorgsintez PJSCKorea Petrochemical IND. Co., LTD (KPIC)LyondellBasellPetroChina Dushanzi Petrochemical CompanyPRIME POLYMERSABICSCG Chemicals & Thai PolyethyleneSinopecTASNEE
Webinar : Benefits of PE100+ Material and their use in Trenchless TechnologyWebinar : Benefits of PE100+ Material and their use in Trenchless Technology

On march 10th, was held the PE 100+ ASSOCIATION first webinar. The webinar was a great success and attracted a large audience.