HDPE PIPE (PE100 PIPE) TECHNICAL SPECIFICATION and TEST METHODS FOR PIPING SYSTEMS
HDPE Pipes contains a variety of features in the structure and chemical properties due to the technical structure of HDPE pipe. Pe 100 Pipes has some features of its own raw materials, measurable creates some specifications after the pipe manufacturing process. HDPE Pipes, once produced, prior to use, are subject to certain chemical and visual tests.
Many properties of HDPE pipe applications, attributed to design and use of standard, a standard suitable test has been dedicated to their specifications. Tests for HDPE pipes it published identified with bar codes and methods and are certified according to the project. Some also standards for PE pipes as called polyethylene pipe, ASTM (American International Standard) published by and it has also been adopted compatible with other standards. Some of the production and use of standards for HDPE pipe ASTM, AWWA (American Water Works Association), CSA (Canada Standard), British Standard (BS) and the most important in Europe Standard (EN) are the methods to be published. Both production and test code are available for each standard and a lot of tests according to standard of HDPE pipe is performed when necessary.
To determine the usage of HDPE pipe before the test application, you need to limit the test. HDPE pipe is quite diverse areas of HDPE pipe and fittings Standard Specification ASTM D 3350 and EN 12201, BS 12201 Specifications issued.
Some of the Checmical Tests of PE 100 Pipes as follow;
- PE 100 pipe Pressure Tests,
- HDPE Pipes Density Tests,
- HDPE Pipe MFI / MFR Test,
- HDPE Carbon Black Test,
- Pe100 Elongation at Break Test,
As additionally, besides the chemical tests of HDPE Pipe, the visual tests done as follow;
- Diameters of PE100 pipes (DN)
- Weights of PE Pipes (KG/M)
- HDPE Pressure Numbers (PN)
- HDPE Pipe Tolerances
- Thickness of the pipes (S)
- Standart Dimention Ratio – Rates of the PE 100 Pipes (SDR)
TESTING FORMULAS OF POLYETHYLENE PIPE
- Pressure Testing of HDPE Pipe : S = Hoop stress (psi or, MPa)
- Internal Pressure Testing for Pe Pipes : P = Internal pressure (psi or, MPa)
- Diameter : Dm = Mean diameter (in or, mm)
- Thickness : t= minimum wall thickness, (in or, mm)
PE pipe outer diameter, which are controlled or in some cases performed for two
PE pipe inner diameter controlled single standard appears above equation
the below forms:
HDPE Pipe pressure application purposes, the pipe’s pressure rating (PR) is determined as hydrostatic design stress (HDS) that is assigned to the material of Polyethylene Pipe. That’s why equation can be re-build and written in terms of HDS as follows:
The formula Do/t is featured to the outer diameter of Polietilen Pipe as dimension ratio and the formula D/t the inner diameter of Polietilen Pipe dimension ratio. Still the rules in PE pipe standards is to limited these rates to a standard few. The terms are as below called;
• Standard Inside Diameter Ratio (SIDR)
• Standard Dimension Ratio (SDR)
HDPE Pipe (Pe 100 )Size Chart stated as in the size charts for the below information.HDPE Pipes Specification in world standards for EN 12201-2, ISO 4427 and DIN 8074 uses according to projects and HDPE pipe technical specifications shown in the standart HDPE pipe size chart which you can find following link : HDPE pipe size chart
IN POLYETHYLENE PIPING SYSTEMS ENVIRONMENTAL FACTORS ON PHYSICAL SPECIFICATION OF HDPE PIPES
1- Chemical Resistant
In the municipally and industrial water pipe projects or polyethylene sewage pipes which is chemically insert. There are several chemicals will affect but they do not rust or corrode or need cathodic protection by electrolytic action.
Drinking water should be disinfected by pipe ANSI / AWWA C651 with chemical solutions are used to disinfect new or repaired drinking system should not exceed 12 percent of active chlorine. In high concentrations, it can be reduce polyethylene.
Most of governmental projects, industrial water and sewage pipes are making proterction against degradation caused by ultraviole lights from the direct sunlight.
HDPE raw materials are contains divided carbon black and 2 percent to 3 percent, this carbon black amount of HDPE Piping sytems must be 2-2,5% according to EN 12201-2 Polyethylene Piping standard.
Carbon black is the most effective additives for the improving the disintegration speciality of the PE Pipes.
Municipal and Industrial Water or Sewer confidence due to ultraviolet exposure may be stored outside in most regions for many years as per the standards without the danger of loss of physical specifications.
3- Installation Temperatures
Installation of HDPE Pipes, there no any special conditions on the terrain applications in the industrial water piping projects and sewage pipes can be installed at any temperature condition in which normal installation operations would be apply.
4- Thermal Expansion and Contraction
Thermal expansion coefficient 9 x 10-5 inches for projects / inch / degrees F. This turns to a simple rule of thumb: The length of pipe temperature of 10 degrees F per 100 feet 1 inch HDPE pipe length varies per change. Expansion effect and HDPE pipe using compression fittings or push-fit type must be known when recession. HDPE Pipe fittings PA forces to resist the thermal stress generated by the withdrawal pipe must be durable enough.
5-Effect of External Resistance Stress
External stress caused by extreme consideration to avoid failure, must be the installation of all plastic pipe system. Field experience a tensile strength of externally induced material breakdown and cause internal pressure exceeds showed acting independently or in combination. Excessive bending of plastic pipe systems installed mainly in the joints, stress and may exceed the limits will result in failure. Parts combined pipeline and put it right class and differential settlement and so it should be carefully backfilled to prevent excessive bending.
6- HDPE Plastic Pipes Repair
There is a third party for repair of damage to plastic pipes initial setup and poor workmanship. Repairs can be minimized using careful mapping location and methods and with the right training and supervision procedures. Similar ductile iron pipe PE repair with PVC water pipe. Mechanical couplings or electrofusion methods can be used to damage such as drilling rupture or repair saddle. The first step identifies the problem in making a repair. For smaller dimensions, an electro-fusion system is useful during polyethylene pipe repairs.