2021 Amsterdam : APPLICATION OF PP-R COMPOSITE REINFORCED PIPES IN HOT AND COLD WATER SYSTEMS
Author(s) : Lei Wang, Guozhi Xu, Qiaoping Qiu, Weihua Lu, Yanwang Han
PP-R (random copolymerized polypropylene) has been widely used in hot and cold
water systems. However, the standard PP-R pipes have the disadvantages of a large
high-temperature thermal expansion coefficient, an insufficient notched impact strength,
and a low temperature and pressure resistance.
In this paper, a new...
2004 Milan : DEVELOPING PE 100 RESINS WITH PAC TEST
Author(s) : N. Brown
The three major requirements for a gas pipe resin are (1) the MRS , (2) excellent resistance to
slow crack growth[SCG] and (3) resistance to brittle fast fracture as exhibited by a low S4
critical temperature,[Tc]. In order to develop a new PE resin, it is necessary to investigate many
variables involving the...
1998 Gothenburg : Elastomeric Joint Comparison of PVC, VC and FCR Pipes
Author(s) : Lu, Burn, Whittle
For rubber ring joints to resist plant root penetration, it has been reported and promulgated into
Australian Standards that a sufficiently high contact pressure between the rubber and the pipe
must be maintained. The evaluation of the appropriate interfacial pressure to be used has been
under discussion for some time...
1998 Gothenburg : Impact Test for Preventing RCP
Author(s) : Brown, Lu
The S4 critical temperature (CT) for 110 mm pipe was correlated with the plane stress
impact energy for 13 resins. A plane stress impact (PSI) test is offered as an inexpensive
way to control RCP by determining the lot to lot variations of the critical temperature of a
resin. Details of the PSI test are presented.
1998 Gothenburg : Long-Term Creep of ABS Pipes at Variable Temperatures
Author(s) : Lu, Burn
One of the characteristic behaviours of plastics (or viscoelastics) materials is the creep
phenomenon, which is defined as the continuing deformation under a constant load with time.
Although research on creep of plastics pipes has been widely carried out in other plastics, little
work has been reported for creep in...
1995 Edinburgh : Assessing mechanical properties of polymers for pipe application
Author(s) : Dear, Brown, Mason
The threshold load to just maintain crack propagation and conditions for catastrophic failure, should the material be loaded above this threshold, are two key evaluation requirements when assessing polymers for pipe applications. Often these assessments need to be made during material research and development and...
1995 Edinburgh : Molecularly Orientated PVC Pressure Pipes
Author(s) : Lowdon, Chantre, Brown
The Water Distribution Technical Centre
Lyonnaise des Eaux operates a network of three water distribution technical centres which serve the needs of the Lyonnaise des Eaux Group in the area of potable water distribution technology. The main centre, known as the Water Distribution Technical Centre (WDTC), is based at...
1995 Edinburgh : The Validation of a PE for a Gas Pipe System
Author(s) : Brown
ASTM D2837 and ISO/TR 9080 for
validating PE resins were analyzed. It
was found that the difference between
11.3 yr. and 50 yr. as specified in D2837
and ISO/TR 9080, respectively, has very
little effect on the determination of the
Long Time Hydrostatic Strength (LTHS)
at the service temperature, but this
1988 Bath : The Failure of Polyethylene Gas Pipe Materials by Slow Crack Growth
Author(s) : Brown, Lu
Two of the pipe resins that are commonly used in
the USA are compared with respect to their relative life times. The improvement in the performances of the currently used materials compared to
the older material from the same producer have
been measured. T h e 1ahoratoi-Y conditions for
producing brittle failure in...
1970 Southampton : Applications for Plastics Piping in Marine Laboratories
Author(s) : Brown
An early record of the use of a l'plastictl or flexible pipe is in 1733 when the Re\/. Stephen Hales wished to measure the blood pressure of a horse. He had a brass canula, to insert into an artery, and a long glass tube; but he had to find a flexible pipe to connect the two. His solution was to use the trachea, or...