Plastic Pipes & Fittings Testing

Testing to ISO 9080 (MRS) and ASTM D2837 (HDB)

A complete evaluation includes hydrostatic pressure testing for generation of test data followed by regression analysis for determination of the long term hydrostatic strength, and finally classification of HDB (Hydrostatic Design Basis) or MRS (Minimum Required Strength).

• MRS classification to ISO 9080 is based on the long-term hydrostatic strength at 20°C and 50 years.
• HDB classification to ASTM D2837 / PPI TR-3 is based on the long-term hydrostatic strength at 73°F (23°C) and 100,000 hours.

Standard test conditions

For cold water and gas pipe materials the common test temperatures are 20°C, 60°C and 80°C. For hot water materials 20°C, 70°C, 95°C and 110°C are normally used. For ASTM standards Fahrenheit temperatures are used.

Pipe materials

Element has performed more than 300 different evaluations according to ASTM D2837 and/or ISO 9080, covering

• PE.
• 页
• PB.
• PE.X
• PE.-RT
• PVC
• PSu
• pa

Accurate pipe measurement

High precision measurements of all critical dimensions of the test samples are carried out by a robot cell. Finding the minimum wall thickness is critical to minimize scatter in pressure testing results. Our automated measuring process by computed radiography is helping to make certain we cover the whole pipe wall. The procedure is ideal for automation of the repetitive work where high precision is required.

For more information, or to request a quote,contact ustoday.

Evaluation of oxidative resistance to hot chlorinated water

Chlorine resistance tests are performed to evaluate the oxidative resistance of piping materials and systems to chlorinated water. While many pipe materials have proved to be resistant to degradation, the ageing process can accelerate under more aggressive conditions with significant impact on lifetime and durability. For example, the common use of chlorine for disinfection purposes is increasing the importance of evaluating chlorine resistance of piping materials and systems.

我们认可的设施可以为广泛的管道尺寸和容量提供可靠和可重复的氯气电阻数据，容量为200氯测试站，允许我们的客户使用测试结果进行“ANSI NSF”的认证。乐动体育软件最新版

Testing to ASTM F2023 and ASTM F2263

For chlorine resistance tests Element applies the standard methodology of ASTM F2023 (PEX, PE-RT, PP) and ASTM F2263 (PE) for testing and evaluation of the long term chlorine performance. These methods can also be used for other piping materials.

Test principle

The testing is conducted under accelerated conditions at elevated temperatures and pressures. The most common and accepted approach is to perform exposure under ”worst case” conditions.

Standard test conditions

• Dimensions: up to OD 63 mm (2” US)
• Capacity: >200 pipe samples
• Temperatures: 40-120 °C
• Chlorine concentration: 0.5 – 4.3 ppm (mg/dm³), up to 100 ppm to simulate shock chlorination
• pH: 6.8 is set as standard (others on request)
• Flow rate: 54 dm³/h (others are available upon request)

For more information, or to request a quote,contact ustoday.

ISO 13477, S4-TEST

ISO 13477 specifies a test method also known as the Small-scale steady-state test (S4 test) for determination of arrest or propagation of a crack initiated in a thermoplastic pipe at a specified temperature and internal pressure. The aim is to assess the performance of thermoplastics pipes that are intended for the supply of gases or liquids. In the latter case air may also be present in the pipe. This test typically demonstrates critical performance criteria at below zero temperatures for PE pressure pipes.

Principle

A section of a thermoplastic test pipe of a specific length, maintained at a specified test temperature, containing a fluid at a specified test pressure, is subjected to an impact, near one end, in order to initiate a fast running longitudinal crack. The crack initiation process itself is designed to disturb the test pipe as little as possible.

Test procedure

The test temperature and test pressure are defined in the appropriate standards. The fluid is either identical to the one used in the intended application or an equivalent substitute. Rapid decompression ahead of the propagating crack is retarded by internal baffles and by an external cage which restricts flaring of the test pipe at the edges of the fracture.

Hence this technique achieves steady-state rapid crack propagation (RCP) in a short pipe specimen at a lower pressure than in a full-scale test. The tested pipe is examined to determine whether arrest or propagation of the crack has occurred. From a series of tests at different pressures and at constant temperature, the critical pressure or the critical hoop stress for RCP can be determined. Similarly the critical temperature for RCP can be determined by testing at different temperatures at constant pressure or hoop stress.

For more information about our plastic pipe and pipe fittings testing, or to request a quote,contact ustoday.