6 TYPES OF PIPES MOST COMMONLY USED IN BUILDING CONSTRUCTION

In any building construction piping systems are designed to serve the following primary purposes.

• 到苏pply water everywhere in the building
• 为了处置地面上的雨水
• To dispose water from water closets and washbasin etc
• To drain soil & waste water to septic tanks or town sewers.

市场上可用于上述目的的主要管道的主要管道类型如下。

1. Cast iron pipes and fitting
2. 塑料或PVC管道
3. 镀锌钢（GI）管道
4. 石器管
5. 石棉水泥（AC）管道
6. 混凝土管道

1。铸铁管

铸铁管和配件主要用于设计土壤和雨水处理系统。这些管道是由沙子铸造过程或旋转制成的。

通过将熔融铸铁倒入垂直安装的沙子中，制造砂管。它们有1.5、1.8和2米长，厚度为5和6毫米。

通过将熔融的灰色铸铁倒入旋转的水冷却模具中，从而产生了旋转管道，从而产生长度高达3米的无缝管，厚度小于砂纸。

2。塑料或PVC管道

如下所述，市场上有3种常见的塑料管道。

1. 不形化的PVC（UPVC）或与冷水一起使用的刚性管道
2. Plasticized PVC pipes which are plasticized with addition of rubber. It has lower strength and lower working temperature than UPVC pipes.
3. 氯化PVC（CPVC）管道可以承受更高温度至120⁰(used to carry hot water)

For pipes used in soil and waste water discharge systems, the thickness of the wall will be larger than that of used for roof drainage.

刚性PVC管用于温度低于45的水的水⁰C。

在较高的温度下，管道的强度降低。类似地，阳光的紫外线辐射以及温度频繁的变化会降低PVC管道的寿命。

这些管道比AC管道昂贵，但比GI管道便宜。

3。镀锌钢（GI）管道

GI管由钢管制成。镀锌工艺沉积了锌的薄涂层，可保护其免受腐蚀。

They are available in light, medium and heavy grades depending on the thickness of the metal. For a 15 mm GI pipe, the thicknesses are 2.0, 2.65 & 3.25 for the light, medium and heavy grades, respectively. Generally the medium grade pipes are used for internal plumbing in building.

These pipes corrode easily if it carries brackish water or concealed in lime concrete and brickwork or buried under the ground.

These pipes are costlier than PVC pipes.

4。Stoneware Pipes

这些管道以10毫米至600毫米的内径形式可用，厚度从12 mm到43毫米不等。

A good stoneware pipe should give a sharp clear tone when struck with a light hammer.

These pipes are extensively used as underground drainage pipes in low cost construction buildings. Usually these pipes are laid on an even bed of concrete and further treated as specified for laying in different types of soils. However laying of these pipes requires experienced workmen and good supervisor. Therefore PVC pipes are being preferred to these pipes in many places.

这些管道很便宜。

5。石棉水泥（AC）管道

这些管道用于从屋顶，土壤和废物以及通风中排出雨水。它们分为两个配置文件 - 一个带有插座周围（WB）的串珠，另一个则无需插入插座（WOB）。后一种类型比前者更普遍。

The pipes come in lengths of 3 meters.

The principal defects of these pipes are that they are heavy and they break easily.

这些管道比PVC管道便宜。

6。混凝土管

小直径以及大型直径的加固和预应力的混凝土管道可用于供水和其他用途。

小型未加固的混凝土管非常用于排水。

大型管道通常用于主要的供水工程。