Astm HDPE pipe testing specifications

Written by tamara wilhite
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Astm HDPE pipe testing specifications
High density polythene pipe is commonly used to carry water and liquids. (Zedcor Wholly Owned/ Images)

High density polythene (HDPE) is commonly used in water pipes, waste water piping, plumbing fixtures, and edging. ASTM also issues standards on testing HDPE pipe to verify that it meets necessary specifications. ASTM D2122 defines the test for finding the dimensions of thermoplastic pipe like HDPE. Other ASTM standards only address HDPE pipe.

Crack Resistance Testing

Crack resistance ensures that pipe will not crack and thus leak during expected usage. Environmental stress crack resistance (ESCR) tests are performed according to ASTM D1693. HDPE pipe can be tested via a single point notched constant tensile load test in accordance with ASTM D5397. This is also called the NCTL test. According to "HDPE Pipe" by Yick Grace Hsuan and Timothy McGrath, "a single point (SP) NCTL test (ASTM D5397-Appendix) was also developed."

Pipe Stiffness Testing

Pipe stiffness is a measure of how well it retains its shape under load. HDPE pipe stiffness testing is done via a standard ring deflection test. This is done according to ASTM 2412. The HDPE pipe is pressed between two plates. The stiffness is measured by the standard dimension ratio (SDR). "Inspecting Pipeline Installation, Volume 117" says "the force required to deflect the pipe to a given percentage of the diameter (general 5%) is determined".

Road Drainage Pipe Standards

HDPE pipe is used in storm water drainage and retention structures like underground storm drains and storage tanks. The American Association of State Highway and Transportation Officials (AASHTO) has four standards for specifications for HDPE pipe used for drainage for roads and highways. According to "HDPE Pipe" by Yick Grace Hsuan and Timothy McGrath, "the material requirement in all four AASHTO specifications is based on ASTM D3350". ASTM D3350 is the standard specification for polythene plastics pipe and polythene fittings. This standard allows recycled HDPE to be used for drainage pipe if it meets the material specifications such as tensile strength and crack resistance.

Astm HDPE pipe testing specifications
Underground pipes from street drains are often made of HDPE pipe. (Jupiterimages/ Images)

Related Tests

ASTM D1898 is the standard of sampling plastics for further testing. ASTM D638 is the standard for testing tensile strength of plastics such as HDPE. ASTM D743 is the test for determining the brittleness of plastic on impact. ASTM D5033 is the guide for using recycled plastics, including recycled HDPE. ASTM standard F405 describes the specifications for corrugated HDPE pipe 3 to 6 inches in diameter. ASTM F667 gives the general standards for corrugated HDPE pipe 8 to 15 inches in diameter. ASTM D618 is the method of conditioning plastics prior to other ASTM tests.

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