Pipes/piping polybutylene

An important application of polybutylene is plumbing pipe for both commercial and residential use. The excellent creep resistance of polybutylene allows for manufacture of thinner wall pipes compared to pipes made from polyethylene or polypropylene. However, recently this appUcation has come vmder review because of aging degradation of polybutylene plumbing. Several building codes now prohibit the use of polybutylene pipe. Polybutylene pipe can also be used for the transport of abrasive fluids. 

Polybutylene It is a polyolefin used for cold and hot water piping. As a blown film it is used for food packaging. 

ISO 15876-1 2003 Plastics piping systems for hot and cold water installations - Polybutylene (PB) - Part 1 General... 

Focusing collectors are usually cast acrylic Fresnel lenses, or mirrors of aluminized polyester film in frames of aluminum. These reflectors are either enclosed in a bubble of poly(vinyl fluoride) film, or under polycarbonate glazing, which may be covered with a fluorocarbon film to reduce the reflectivity. The absorbers for active systems are copper or aluminum since the temperatures are too high (325—370°C) for plastics. The frames, however, can be molded ABS, high density polyethylene or polyurethane, either solid or structural foam. Polybutylene or chlorinated PVC can be used for piping hot water, and tanks can be made of either reinforced polyester or blow- or rotational-molded, high density polyethylene (12—15). 

Leseman WG. 1986. Water contamination caused by gasoline permeating a polybutylene pipe. JAWWA 39-43. 

Shell Pd utyl. [Shell] Polybutylene resin thermtqtlastic resin for polymer bloi g, film, pipe applies. 

Shell Pdybutylene. [SheU] Polybutylene resin thermqdastic resin for polymer blen g, film, pipe tqrplics. 

Ground coupled heat pumps may now be feasible, largely due to the availability of durable and Inexpensive plastic pipe. Pipe materials such as polyethylene, FVC, and polybutylene have been found to be adequate In some Instances. However, no material standards or recommended design practices exist to facilitate the optimization of the performance, cost and reliability of these systems. 

The plastic pipe market is dominated by PVC pipes, which hold 80% of the market. Polyethylene, principally HDPE, is used for about 12% of pipe production. Following polyethylene are other higher priced, specialty pipes made from ABS terpolymer, chlorinated PVC, polypropylene, polybutylene, and fiber-reinforced epoxy and polyester. 

PP-R has lower strength, but greater flexibility, whilst retaining good high temperature capability. The material is used for smaller diameter flexible tubing in hot water internal piping. Here it competes as a lower cost alternative to PE-X and polybutylene. 

Plumbing (piping for cold/hotwater, drainage and gas distribution and floor heating systems) Mostly PVC, CPVC (for large diameter industrial pipes), MOPVC, PE-FiD and ED and other types, ABS, PP, GRP, polybutylene (PB), acetal, polyolefins (croslinked PE (XPE) (for floor heating)... 

For hot water systems, (i.e., in underfloor heating systems and for hot water distribution), pipes are mainly polybutylene (PB), which can be used in systems with a continuous operating temperature of 82 °C and can survive short peak temperatures of up to about 110 °C, as well as crosslinked polyethylene (XLPE) with improved creep resistances, that can withstand operating temperatures for the same range as PB. The heat dispersion is optimised by these plastic piping systems by using the heat storing capacity of the floor. 

Use of buried plastic pipes also called geopipes , for pipeline transmission of water, gas, oil and in drainage systems for bnildings, retaining walls, tunnels, highways, railways, slopes, landfills, etc. PVC, HDPE, PP, polybutylene (PB), acrylonitrile butadiene styrene (ABS) and cellnlose acetate bntyrate (CAB) are the polymer resins in current... 

Most polymers used today are thermoplastics. Poiypropylene (PP), polyethylene (PE), polyethylene terephthalate (PET), and polystyrene (PS) often find application as low-end consumer items, packaging or others. Technical parts are produced mostly from acrylonitrile-butadiene-styrene-copolymer (ABS), polyamide (PA), polybutylene terephthalate (PBT), polyoxymethylene (POM), polyether sulfone (PES), polycarbonate (PC), polyphenylene sulfide (PPS), polytetrafluoroethylene (PTFE), polyether ether ketone (PEEK), or polyimide (PI). Polyvinyl chloride (PVC) is a material often used in building construction, especially for roofing membranes, window frames, and pipes, and its properties (rigid or flexible) are generally modified by additives. 

There are many applications for polyolefin compounds in the processing of pipes, tubings, and fittings from polyethylene (PE), crosslinked polyethylene (XPE), biaxially oriented polyethylene (PEO), polypropylene, and polybutylene. 

For example, Tables 4 and 5 give the values of two basic properties for two types of polyolefin pipes crosslinked polyethylene XPE SDR 9 (degree of cross-linking, 64- 89%) and polybutylene PB 21-SDR 11. 

TABLE 4 Mechanical properties for crosslinked polyethylene (XPE-SDR 9) and polybutylene (PB21-SDR 9) pipes... 

Large-diameter polybutylene pipe can be used as commercial and industrial process piping at temperatures up to 82°C. 

TABLE 8 Mechanical properties for large-diameter polybutylene pipes... 

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