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General Information

 

With more than 18 years experience in the development and manufacture of plastic pipe fittings, EEPCO is the leader in respect of :

reliability .
safety.
durability .
uniformly high quality.

In addition to first class service and highly qualified technical advice, EEPCO pvc fittings are available to customers .

Allowing for length changes in PVC pipeline :

Determining the change in length:
The first step in calculating the required length of the flexible section is to determine the extent of the change in length.
This is given by the following formula.

ΔL = L . ΔT . 0.08

where:
ΔL = change in length in mm
L = length in m of pipe or pipe section for which length change is to be determined.
ΔT = difference in C between the installation and the maximum or minimum operating temperature.
0.08 = Coefficient of linear expansion for PVC in mm / m C

Pipe bracket spacing and supporting PVC pipelines

1. General

plastic pipeline need to be supported at certain intervals, which depend on several factors, the material, the average pipe wall temperature, the density of the medium the size and wall thickness of the pipe.
The determination of the spacing between pipe brackets has been based on the permissible deflection of the pipe between consecutive brackets . the figures in table 1 are based on a maximum permissible deflection of 0.25 cm between consecutive brackets for PVC pipes of pressure ratings PN 10 PN 16.

2. pipe bracket spacing for fluids of density ≤ 1 g / cm3

 

Material and PN
Pipe bracket intervals L in cm at
D mm20oC30oC40oC50oC60oC
 

 

PVC

 


PN 10

PN 16

 

 20  90  80  60  55  40
 25  95  85  65  55  40
 32  105  90  70  60  45
 40  120  110  90  70  55
 50  140  130  110  85  65
 63  150  140  120  95  70
 75  165  155  135  110  80
 90  180  170  150  125  95
 110  200  190  170  145  115
 160  240  230  210  185  155
 200  270  260  240  215  185
 The pipe spacing
given in the table
may be increased
by 30 % in the
case of vertical
pipe runs.



 

Which material is suitable ?
Why use EEPCO U-PVC pipe Fittings ?

The choice of material and the pressure rating of the pipe components are important for both operating safety and attaining the specified minimum operational life of the system. The decisive factors are:

Operating pressure , operating temperature, the medium transported and the duration of service.

Safety factors of selected thermoplastics

MaterialSafety factor 
PVC –U  2.5
PVC -C  2.75
PVDF  2
PP-H   2.1
PE-HD  1.6
ABS  1.3