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By admin | 8:30 AM CST, Thu August 04, 2011

image.google.com

search: ppr pipe site:co.kr

其他类似。。。。

PPR管的规格标识:

By admin | 6:32 AM CST, Fri July 29, 2011

一、PPR管的规格标识:

PPR管材规格用管系列S、公称外径dn×公称壁厚en表示

例:PPR管系列S5、PPR公称直径dn25mm、PPR公称壁厚en2.5mm

表示为S5、dn25×en2.5mm

PPR管系列S:是用以表示ppr管材规格的无量纲数值系列,有如下关系S=(dn-en)/ 2 en

其中:dn——PPR公称外径,单位为mm

en——PPR公称壁厚,单位为mm

一般常用的PP-R管规格有5、4、3.2、2.5、2五个系列

PPR管规格PPR管材按标准尺寸率SDR值分为11、9、7.4、6、5五个系列。

PPR管规格PPR标准尺寸率SDR:为PPR管材公称外径dn与公称壁厚en的比值。

PPR管规格SDR与PPR管系列的关系如下:SDR=2S+1

二、RPP管件规格的表示方法:

PPR管件公称外径dn指与PPR管件相连的PPR管材的公称外径。PPR管件的壁厚应不小于相同PPR管系列S的PPR管材的壁厚。

大部分企业PPR管件都只有最高标准S2一个系列,冷热水全部试用

PPR管规格S5系列--------------1.25兆帕(12.5公斤)

PPR发展史

By admin | 3:15 AM CST, Mon May 30, 2011

PPR管用作给水管在国外已有几十年的历史,我国在1999年前后开始进口成品,现在大多自主生产。

PPR

MILESTONES IN PVC WATER PIPE HISTORY

By admin | 3:12 AM CST, Mon May 30, 2011
  • 1932 – First tubes were made from polyvinyl chloride (PVC) in Germany.
  • 1935 – The first PVC pipes were manufactured (Germany).
  • 1936 – PVC pipes began to be installed for residential drinking water distribution and waste pipelines (Germany). Most are still in service.
  • 1949 – Initial use of PVC pipe in North America.
  • 1952 – PVC pipe introduced in the U.S.
  • 1955 – First PVC water distribution pipes laid in the U.S.
  • 1960 – Original publication of ASTM D1785 – Standard Specification for PVC. Plastic Pipe, Schedules 40, 80, and 120.
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