Water conveyance pipe naterial manual#

In addition, due to their weight they generally come in short lengths increasing costs for layout and jointing.

However, cast iron pipes are heavy, which makes them unsuitable for inaccessible places due to transportation problems. Galvanised steel or iron piping may also give an unpalatable taste and smell to the water conveyed under corrosive conditions (WHO 2006).Ĭast iron pipes are quite stable and well suited for high water pressure. The use of galvanised steel or iron as a conveyer for drinking water is problematic where water flow is slow or static for periods of time because it causes rust from internal corrosion. Although still used throughout the world, its popularity is declining. Galvanised steel or iron is the traditional piping material in the plumbing industry for the conveyance of water and wastewater. They can also be easily welded (LEE n.y.).

They can withstand high water pressure, come in convenient (longer) lengths than most other pipes and thus incur lower installation/transportation costs.

Steel pipes are comparatively expensive, but they are the strongest and most durable of all water supply pipes. Plastic pipes include plasticised polyvinyl chloride (PVC) pipes (LEE n.y.). Cement pipes include concrete cement pipes and asbestos cement pipes. Metallic pipes include steel pipes, galvanised iron pipes and cast iron pipes. They can be divided into three main categories: metallic pipes, cement pipes and plastic pipes. Joining individual water pipe lengths to make up extended runs is possible with flange, nipple, compression or soldered joints (SCOTT 2011). Materials commonly used to construct water pipes include polyvinyl chloride (PVC), cast iron, copper, steel and in older systems concrete or fired clay. Water pipes can range in size from giant mains of up to 3.65 m in diameter to small 12.7 mm pipes used to feed individual outlets within a building. The varieties of water pipes include large diameter main pipes, which supply entire towns, smaller branch lines that supply a street or group of buildings, or small diameter pipes located within individual buildings. In well planned and designed water distribution networks, water is generally treated before distribution and sometimes also chlorinated, in order to prevent recontamination on the way to the end user. If the water is treated before distribution or at the point of use (POU) depends on the context.

Vitrified clay pipe and clay drain tileĭesign engineers, utility managers, planners, and educators will find MOP 125 to be an essential reference for designing, installing, and maintaining pipelines that convey water and drainage.A water pipe is any pipe or tube designed to transport drinking water to consumers.

High-density polyethylene (HDPE) pressure.

Water conveyance pipe naterial manual#

This Manual of Practice (MOP) pertains to the following types of pipe: Information about common standards, industry groups, and reference publications is also included. Installation and maintenance criteria include specifications tapping methods repair methods installation, backfill, and protective requirements and useful life. Performance characteristics include allowable internal pressure, external load capabilities, hydraulic resistance factor, wave speed, allowable leakage rates, and water quality tolerances. For each type of pipe, 20 characteristics are described, including such physical attributes as material, available sizes, standard lengths, protective linings and coatings, joints, and fittings. Pipelines for Water Conveyance and Drainage offers a concise listing and description of 11 types of pipe commonly used for water conveyance and drainage.