Generally, when customers inquire about PE water supply pipes, they will directly report the specifications and models of the pipes, but for those who have just started to contact PE pipes, some terms may not be clear. The following editor Deng Quan will study with you the common abbreviations of our PE pipes.
1. PE100 or PE80

PE100 refers to the grade, PE100 grade, PE100 (100～1.0Mpa) is the minimum required strength (MRS) of the polyethylene raw material after rounding the classification number, according to GB/T18252 to determine the material and 20 ℃, 50 years, forecast The probability of 97.5% corresponds to the hydrostatic strength σLPL. According to the conversion, the MRS is calculated, and the MRS is multiplied by 10 to obtain the grade number of the material. Generally there are PE100, PE80, etc.

2. DN and DE

What is the difference between DN and DE for PE pipes? In some of our design drawings, we can see that the markings for PE pipes are sometimes marked with DE and sometimes marked with DN. What does it mean?

In the earliest days, DN means the nominal diameter. For example, it refers to the inner diameter when applied to steel pipes. When DN was used in the earliest PE pipe design, we also defaulted to the inner diameter. For example, DN100 PE pipe basically refers to the inner diameter. PE pipe with an outer diameter of 110.

However, after the latest release of GB/T13663-2000 by the General Administration of Quality Supervision, Inspection and Quarantine, DE and DN have been unified to refer to the outer diameter of the PE pipe, which means that both DN200 and DE200 refer to the outer diameter of the PE pipe. I have been silly to distinguish between DN and DE which indicate inner diameter, outer diameter, and nominal diameter. Now I finally figured it out.

Three, Mpa

Mpa refers to the pressure level. PE pipes are generally divided into five levels, namely 0.6Mpa, 0.8Mpa, 1.0Mpa, 1.25Mpa, and 1.6Mpa. For example, 0.6Mpa means that the PE pipe can withstand a pressure of 6 kilograms; 1.6Mpa means that the PE pipe can withstand a pressure of 16 kilograms.

Four, SDR

SDR refers to the diameter-to-wall ratio of the pipe, that is, the outer diameter divided by the wall thickness is equal to 11. The term name is the standard size ratio. For example, SDR11 indicates the ratio of the outer diameter to the wall thickness of the SDR on a PE pipe.