天然气管件接头及配件 塑料

一、性能和特点：property and feature

1、抗冻耐温，工作温度-30℃-150℃；
2、抗震性强，标准工作压力在2.0mpa以上；
3、耐腐蚀，不结垢，卫生指标符合gb/t17219-1998标准；
4、重量轻，运输方便；
5、安装方便、快捷、安全、无需“攻丝”工序；
6、成本低于品质铜管件50%左右；
7、可直接用于工业与民用工程：纯净水、冷热水、太阳能、空调、医疗、食品、化工等流体和气体输送管道系统的连接；
8、基材为聚酰增强树脂，柔韧性、坚固性，使用寿命长。

(1)tolerance to freezing and high temperature: its operational temperature -30°c - 150°c;

(2)high tolerance to vibration, with standard operational pressure more than 2.0 mpa;

(3)corrosion resistance without fouling, its sanitary meets standard of gb/t17219-1998;

(4)light and convenient for transportation;

(5)easy, rapid, convenient and safe for installation, without process of tapping;

(6)the cost is lower by about 50% compared with that of copper pipe fittings with same ;

(7)can be directly used in industrial or civil pipeline engineering projects, including transportation pipeline for liquid and gas such as purified water, cool or hot water, solar energy, air conditioner, medical facility, food and chemical industry and so on;

(8)basic material is reinforced polyamide resin, that has the best flexibility and solidity and long service life.

二、主要技术指标如下：principal technical indicators are shown as follows:

1、卫生指标应符合gb/t17219-1998生活饮用水输送配设备及卫生防护材料安全性评价标准；
2、外观：符合内外表面光滑、平整，无凹陷，裂缝和其他影响性能的表面缺陷，不含有可见杂质，同时应色泽均匀一致；
3、耐压性能测试压力：≤14mm为7.0mpa；＜16mm-18mm为5.0mpa；
≤18为25mm为4.0mpa；≥25mm5为2.4mpa；
测试时间为5min，无渗漏、破裂；
4、交变试验：10次冷热循环后，加压2.4mpa；保持10min，无渗漏、破裂；
5、强度性能在-10℃下放置1h后加压2.4mpa，保持10min；
在100℃下放置1h后加压2.4mpa，保持10min；两者应无渗漏、破裂。
6、产品在150℃下长时间做高温检测，加压2.0mpa保持200h以上，管件应无渗漏、破裂；
7、常规条件下，做管环径向拉伸试验，产品拉伸强度为≥2000n；≤5300n。

(1)hygienicindicatormeets the standards of gb/t17219-1998 for potable water transportation and of safety evaluation of health protection;

(2)appearance: inner and outer surface has lubricity, evenness without any depressed position, flaw, and other defect, which may influence property, without visual impurity. meanwhile the color should be uniform;

(3)testing pressure: if d(diameter)≤14 mm it is 7.0mpa；if d＜16 mm-18 mm, it is 5.0mpa；if d≤18~25mm it is 4.0mpa；if d≥25mm, it is 2.4mpa. the test should last for 5 minutes, and no leakage or flaw is found during testing;

(4)test of alternate change: after 10 times of cool-hot cycles, pressure is increased to 2.4 mpa, and kept to 10 minutes, without any leakage or flaw.

(5)reliability: under -10°c, it is kept during 1 hour. then pressure is increased to 2.4 mpa, and kept for 10 minutes. under 100°c, it is kept during 1 hour. then pressure is increased to 2.4 mpa, and kept for 10 minutes. in both cases, no leakage or flaw is found.

(6)reliability: under 150°c and pressure 2.0mpa, it is kept during more than 200 hours. no leakage or flaw is found.

(7)straining strength: under normal circumstance, the product straining strength of radiation direction should be≥2000n；≤5300n.