Redring DC3810 - Manual (Page 6)

5
SIZING OF D2 COPPER DISCHARGE PIPE FOR COMMON TEMPERATURE RELIEF VALVE OUTLET SIZES
MAXIMUM RESISTANCE
ALLOWED, EXPRESSED AS A
LENGTH OF STRAIGHT PIPE
(I.E. NO ELBOWS OR BENDS)
MINIMUM SIZE OF
DISCHARGE PIPE (D2)
FROM TUNDISH
MINIMUM SIZE OF
DISCHARGE PIPE
(D1)
VALVE
OUTLET
SIZE
RESISTANCE
CREATED BY
EACH ELBOW
OR BEND
up to 9m
up to 18m
up to 27m
up to 9m
up to 18m
up to 27m
up to 9m
up to 18m
up to 27m
22mm
28mm
35mm
28mm
35mm
42mm
35mm
42mm
54mm
15mm
22mm
28mm
G 1 /
2
G 3 /
4
G1
0.8m
1.0m
1.4m
1.0m
1.4m
1.7m
1.4m
1.7m
2.3m
GUIDANCE NOTES - TYPICAL DISCHARGE PIPE ARRANGEMENT
SAFETY DEVICE
(e.g. TEMPERATURE RELIEF VALVE)
500mm MAXIMUM
300mm
MINIMUM
TUNDISH
FIXED GRATING
METAL DISCHARGE PIPE (D1)
FROM TEMPERATURE RELIEF
TO TUNDISH
METAL DISCHARGE PIPE (D2)
FROM TUNDISH,
WITH CONTINUOUS FALL
(SEE 3.9d i-iv & TABLE 1)
DISCHARGE BELOW
FIXED GRATING
(3.9d GIVES ALTERNATIVE POINTS
OF DISCHARGE)
TRAPPED GULLY
New Stainless imp_alt 2/15/05 12:15 PM Page 6