Branch Saddle Heater Plate Information
Most common branch saddles are produced by machining a branch of
a molded tee. Their reinforcement is meant for that size on size
tee! It was not engineered to meet all reducing outlet tee design
combinations. For example, using the area or volume replacement
method of ASME B31.3 for reinforcement, the bore-hole mass drilled
from a 24" DR11 pipe wall for a 2" outlet, is about 6.5
cubic inches. The muff area around the 2" tee-type branch saddle
is not nearly 6.5 cu. in. Thus the 2" tee-type branch saddle
on a 24" DR 11 pipe is not fully pressure rated. The muff reinforcement
of the 2" branch saddle has sufficient mass on it to fully
pressure-rate 3" x 2", 4" x 2" and 6" x
2" reducing tee. Above 6" mains, the 2" saddle reinforcement
does not fully replace the mass of the pipe wall removed for the
outlet hole. Each branch saddle reinforcement should be reviewed
for its capacity to replace the mass of the hole drilled thru the
specified pipe-main in order to maintain a full working pressure
rating.
The Massive Branch Saddles (MBS) of the DIPS sizes are engineered
to cover a wide range of reducing outlets thru 24" DIPS pipe
mains. The mass of the base reinforcement exceeds the mass of the
hole cut from the main to which it will be fused. Thus the full
pressure rating is preserved.
Most contractors wish to use the same header plates that they now
have. This is accomplished by jumping one base size or diameter
compared to the outlet diameter, starting with the 4" outlets.
For example, to fuse on a 4" DIPS outlet, investigate using
a 10" IPS or 8" DIPS heater plate set. Contact your fusion
equipment manufacturer to record below, the following Heater Plate
Sets that apply for your fusion machine:
"IPS" Massive Branch Saddles designed for full bore,
full pressure rating for all main & outlet combinations are
available.
Contact
us today by email or our toll
free number:
sales@oxfordplasticsinc.com
1.800.263.0502
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