AS NADU NEDU IS A PRESTIGIOUS PROJECT UNDERTAKEN BY OUR HON'BLE CHIEF MINISTER Y.S.JAGAN MOHAN REDDY GARU, MISTAKES WHILE RECORDING M-BOOKS ARE NOT TOLERABLE SO AS TO AVOID GIVEN BELLOW ARE REFERENCE FOR RECORDING M-BOOKS FOR CENTRALLY PROCURED ITEMS SUCH AS GREEN CHALK BOARDS, CEILING FANS, SANITERY WARE AND AS SUCH.
Ceiling fans:
As a Amenities secretary, we have to maintain some sort of registers to show the work progress, Leakages arrest materials registers, No of power bores present and their details register like their power, and depth, when it is damaged and when it is repaired, Citizens grievance registers etc.,
Here is the list of registers to be maintained by Amenities secretaries.
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HDPE - High density polyethylene - is highly used material for water pipes. These pipes are
· Flexible
· Long Life
· Chemical Resistant
· Less weight
· Resistant to Sunlight
· Less friction
· Cheaper in cost
· tough
· ductile
· ability to dampen water shock.
The standard specification of HDPE pipes is Nominal pressure - PN . Polyethylene pipes can be used in-between -40 to 60 C based on operating pressure. Based on the material used they also be classified as PE 32, PE 40, PE 63, PE 80 and PE 100.
The pressure grades available in market according to European Standards are
PN 2.5 - i.e., Maximum pressure it can bare is 2.5 bar
PN 4 - Maximum pressure is 4 bar
like that PN 6, PN 10, PN 16 etc.,
For pressure conversions follow this link
Generally color codes are given to the pipes to indicate the pressure.
PE Pressure Grade | Color Code |
PN 16 | Green |
PN 10 | Blue |
PN 6 | Red |
PN 4 | Yellow |
PE 32 & PE 40 pipes are used for low pressure piping systems. PE 63 pipes are used for medium pressure piping systems like drinking water connections, Irrigation purposes. PE 80 pipes for natural gas distribution and drinking water pipes up to 16 bar pressure. PE for high pressure distribution systems.
In some special cases pipes are given some colors to identify where we can use these pipes.
· In general complete black colored pipes for industrial applications
· complete blue (or) black with blue stripes, for potable water applications
· complete yellow (or) black with yellow stripes, for gas conduits
Note: These colors may change based on countries.
