pipes and fittings

Sure Union International Ltd. is a supplier of various piping related products as well as sanitary items(include toilet seat and other bathroom accessories). Its business scope includes Pex-Al-Pex Pipe (or multilayer pipe ), pex pipe, PPR pipe, fittings and tools for these pipes, valves, faucets, drainage systems, bathroom shower, woven flexible hoses and other PVC and/or PE hoses.

Friday, January 07, 2005

PE Water Service, Pipe and Tube Installation Guide

This is another important PDF file,Please download it just by click the title.
If you can not view the PDF file, you will need to download the free Adobe Acrobat Reader.

Thursday, January 06, 2005

PE products FAQ - part 2

Are PE pipe and fittings safe for use in homes? *Reference ASTM and NSF performance and health standards.
Yes, PE is safe for use in the home. As answered above it is a polymer composed of only carbon and hydrogen atoms. PE is commonly used for food containers (milk bottles, plastic food bags, etc.) when the plastic has received approval to NSF International's standards health effects applications by a third party certifying agency. Examples of such standards are NSF 14 and NSF 61.
What is ASTM?
ASTM (American Society for Testing & Materials) is an independent, not-for-profit standards writing organization. It promulgates standards in many diverse technical disciplines. ASTM is the forum for a majority of standards in the USA, especially those related to plastic materials and products testing. ASTM writes standards and conducts educational training seminars (Specifications, Test Methods and Guides. ASTM does not conduct testing, listing, certifying, or enforcement of its standards.
What is NSF?
NSF (NSF International) is an independent, private, not-for-profit, 3rd party certification, testing, and standards writing organization. NSF is accredited by ANSI, (the American National Standards Institute), RvA, (the Dutch Raad voor Accreditatie), and SCC, (the Standards Council of Canada) for its testing, standards writing, and certification programs. NSF writes consensus standards for product, material, and system assessment. NSF provides an array of testing services to many different industries. NSF provides the plumbing industry services for items such as pipes, fittings, valves, pumps, water heaters, sinks, showers, toilets, faucets, controllers, filters, materials, and ingredients. NSF does conduct testing, listing, certifying, and enforcement of its standards.
What is PPI?
PPI (a.k.a. the Plastics Pipe Institute) is a trade organization whose members include plastic manufacturing companies, plastic piping product manufacturing companies, related equipment and chemical suppliers and educators and consultants to the plastic pipe industry.
What is ASTM D 3350?
This is an ASTM Standard which provides a cell classification method for classifying plastics. When classified under D 3350 the plastic material receives an alphanumeric designation, which identifies its mechanical and chemical properties. It is a shorthand method for describing a plastic material.
What is NSF Standard 14?
ANSI/NSF Standard 14 Plastic Piping System Components and Related Materials is a consensus standard promulgated by NSF International. This standard enables comprehensive assessment of plumbing system products, materials, and ingredients for health effects, quality control, quality assurance, marking, material property requirements, long term strength evaluation via PPI TR-3, and short term product performance to various standards such as ASME, ASTM, ASSE, etc.
What is NSF Standard 61?
ANSI/NSF Standard 61 Drinking Water System Components-Health Effects is a consensus standard promulgated by NSF International. This standard enables in depth assessment of a variety of drinking water system products and materials for health effects. This standard is used to evaluate a product for health effect concerns only.
What is PPI TR3?
(Plastic Pipe Institute's Technical Report 3) PPI TR3 is a standard published by PPI which describes, in depth the testing, calculations and theory by which plastic materials are tested to determine their long term strength properties primarily for pressure piping applications. These long-term strength properties (up to 50 years or more) are published, by material, in PPI TR4, which lists this property as an HDB or hydrostatic design basis. These HDBs are then used by engineers in designing plastic piping products for excellent long term service.

Wednesday, January 05, 2005

PE products FAQ - part 1

What is PE (as in HDPE, MDPE, LDPE, LLDPE, etc.) and what are some of its uses?
Polyethylene (PE) is a plastic material belonging to a group of polymers called polyolefins. It is usually first categorized by its density as indicated in the abbreviations e.g. HDPE (high density PE), MDPE (medium density PE), LDPE (low density PE) , LLDPE (linear low density PE). Depending on its specific grade and properties, it is used in a wide range of plastic products from milk bottles and plastic bags (lower end of properties and cost) to high performance plastic pipes (high end of properties and cost).
What is used to make PE or HDPE?
All polyethylenes are made from petroleum feedstocks also known as hydrocarbons. Both the feedstocks (and raw materials) and polyethylene is composed of only hydrogen and carbon (hydrocarbon).
What is a polymer?
A polymer by definition is poly (many) mer (parts). It is generally a very simple molecule (mer) which is chemically combined (polymerized) many times until it attains the final desired properties as a polymer.
What is a stabilizer (thermal vs. ultraviolet stabilizer)?
Stabilizers are added to polymers to enhance their ability to resist natural, environmental, mechanisms which tend to shorten their useful lives. Antioxidants retard oxidation ultraviolet stabilizers retard sunlight degradation, and thermal stabilizers help buffer the degradation effects of high temperature exposure.
What is TiO2?
TiO2, titanium dioxide is essentially an inert white pigment which whitens and opacifies plastics.
What is carbon black?
Carbon black is a black pigment, which can also enhance mechanical properties as well as act as an excellent UV stabilizer when properly compounded into a plastic or rubber.

Tuesday, January 04, 2005

The introduction of PE tubing or pipes

Polyethylene (PE) is a thermoplastic material produced from the polymerization of ethylene. PE plastic pipe is manufactured by extrusion in sizes ranging from ? to 63". PE is available in rolled coils of various lengths or in straight lengths up to 40 feet. Generally small diameters are coiled and large diameters (>6" OD) are in straight lengths.Polyethylene can be used in low temperatures (0 F or colder) without risk of brittle failure. Thus, a major application for certain PE piping formulations is for low-temperature heat transfer applications such as radiant floor heating, snow melting, ice rinks, geothermal ground source heat pump piping, and compressed air distribution.
PE pipe is recognized as acceptable plumbing piping for water services, drainage, and sewer applications in most model plumbing codes. Verify acceptance and installation of PE piping systems with the local code enforcement authorities having jurisdiction.
PE pipe and fittings are available from plumbing supply houses and various hardware retailers throughout the U.S.A. and Canada. PE pipe is generally less expensive than metallic piping materials.
PE pipe must be labeled as follows:
1.The manufacturer's name or trademark
2.The standard to which it conforms
3.Pipe size
4.Material designation code (PE 2406 or PE 3408)
5.DWV if for drainage piping
6.Pressure rating if applicable
7.DR number or Schedule number
8.If the pipe is for potable water, a laboratory seal or mark attesting to suitability