Hanbell RTM-090 - 2.5 Connections and Fittings

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8
Vol. 1.2 © 2020 Hanbell Precise Machinery Co., Ltd.
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2.5 Connections
2.5.1 Suction/discharge/economizer flange size
Figure 2.3 Flange
Position Size
A
B D E F G
Piping
thick.
(JIS) (GB)
RTM-090
Suction 8" 218 221.5 305 350 30 12 25 11
Discharge 6" 167 170.5 260 305 28 12 25 10.5
Mid.-
press.
(Eco.)
2 1/2" 77.5 77.5 140 175 20 8 19 7
Remarks
※Material- standard JIS 20kg/cm²g steel
unit: mm
※Thickness must be equal to the standard or larger
Table 2.2 Flange dimensions
Note：
1. Please weld steel pipes onto flanges by butt-welding and make sure debris has been cleaned,
otherwise the compressor might be damaged during running. Flow velocity in the discharge
side of the compressor could be as high as 15~20 m/sec. High-speed discharge gas will
make noise in discharge connection. In order to decrease the noise level, it’s recommended
to round sharp edges of joints of piping as shown in Figure 2.4
2. The discharge and suction piping is recommended to be one size larger to reduce pressure
drop and noise level. If the noise level is high in discharge side, it is suggested to increase
the piping thickness or enclose with acoustic foam shown in Figure 2.5.