Rehau Firepex, Руководство по проектированию и установке

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5.1.7 Equivalent Length of Fittings
It is common practice for designers to convert the pressure drop
across
fi ttings to an average equivalent length of pipe. These
equivalent lengths are added to the total pipe length. Designers can
calculate total pressure loss using this adjusted piping system length.
Table 5.1: Equivalent Length of Fittings
Couplings
Fitting Description Equivalent Length (ft)
3/4 x 3/4 in. Polymer Coupling 0.8
1 x 3/4 in. Polymer Coupling 2.7
1 x 1 in. Polymer Coupling 1.1
1 1/4 x 1 in. Polymer Coupling 4.0
1 1/4 x 1 1/4 in. Polymer Coupling 2.0
1 1/2 x 1 in. Polymer Coupling 4.8
1 1/2 x 1 1/2 in. Polymer Coupling 2.0
2 x 1 in. LF Brass Coupling 5.2
2 x 1 1/4 in. LF Brass Coupling 5.3
2 x 1 1/2 in. LF Brass Coupling 6.1
2 x 2 in. Polymer Coupling 2.2
Elbows (PEX to PEX)
Fitting Description Equivalent Length (ft)
3/4 x 3/4 in. Polymer Elbow 7.0
1 x 1 in. Polymer Elbow 10.7
1 1/4 x 1 1/4 in. Polymer Elbow 14.2
1 1/2 x 1 1/2 in. Polymer Elbow 16.0
2 x 2 in. Polymer Elbow 24.2
Elbows (PEX to transition)
Fitting Description
Equivalent
Length (ft)
3/4 x 3/4 in. C Female LF Brass Elbow 7.1
3/4 x 3/4 in. C Male LF Brass Elbow 7.4
3/4 x 3/4 in. MPT LF Brass Drop Ear Elbow 7.5
Adapters (PEX to copper)
Fitting Description
Equivalent
Length (ft)
3/4 x 1 in. C Female LF Brass Adapter 3.9
3/4 x 3/4 in. C Female LF Brass Adapter 2.7
3/4 x 3/4 in. C Male LF Brass Adapter 2.6
1 x 1 in. C Female LF Brass Adapter 3.5
1 x 1 in. C Male LF Brass Adapter 3.3
1 1/4 x 1 1/4 in. C Female LF Brass Adapter 4.1
1 1/4 x 1 1/4 in. C Male LF Brass Adapter 4.3
1 1/2 x 1 1/2 in. C Female LF Brass Adapter 5.3
1 1/2 x 1 1/2 in. C Male LF Brass Adapter 5.4
2 x 2 in. C Female LF Brass Adapter 7.0
2 x 2 in. C Male LF Brass Adapter 6.9
Adapters (PEX to MPT/FPT)
Fitting Description
Equivalent
Length (ft)
3/4 x 3/4 in. FPT LF Brass Adapter 2.8
3/4 x 3/4 in. MPT LF Brass Adapter 3.4
3/4 x 1 in. MPT LF Brass Adapter 4.3
1 x 1 in. FPT LF Brass Adapter 3.6
1 x 1 in. MPT LF Brass Adapter 3.8
1 1/4 x 1 1/4 in. MPT LF Brass Adapter 4.9
1 1/2 x 1 1/2 in. MPT LF Brass Adapter 5.9
2 x 2 in. MPT LF Brass Adapter 7.3
Tees
Fitting Description
Equivalent
Length (ft)
RUN
Equivalent
Length (ft)
BRANCH
3/4 x 3/4 x 3/4 in. Polymer Tee 1.2 7.6
3/4 x 3/4 x 1 in. Polymer Tee - 6.8
1 x 1 x 1/2 in. Polymer Tee 1.6 3.9
1 x 3/4 x 3/4 in. Polymer Tee 2.8 6.5
1 x 3/4 x 1 in. Polymer Tee 3.1 10.9
1 x 1 x 3/4 in. Polymer Tee 1.2 6.7
1 x 1 x 1 in. Polymer Tee 1.6 10.6
1 1/4 x 1 x 1 in. Polymer Tee 3.8 9.7
1 1/4 x 1 x 1 1/4 in. LF Brass Tee 4.3 9.6
1 1/4 x 1 1/4 x 1 in. Polymer Tee 2.3 10.1
1 1/4 x 1 1/4 x 1 1/4 in. Polymer Tee 2.2 14.4
1 1/2 x 1 x 1 in. LF Brass Tee 5.5 7.9
1 1/2 x 1 x 1 1/2 in. LF Brass Tee 5.6 12.4
1 1/2 x 1 1/4 x 1 in. LF Brass Tee 4.4 8.1
1 1/2 x 1 1/4 x 1 1/4 in. LF Brass Tee 4.5 9.5
1 1/2 x 1 1/4 x 1 1/2 in. LF Brass Tee 4.3 10.9
1 1/2 x 1 1/2 x 1 in. Polymer Tee 2.2 9.1
1 1 2 x 1 1/2 x 1 1/4 in. LF Brass Tee 1.7 9.6
1 1/2 x 1 1/2 x 1 1/2 in. Polymer Tee 2.6 17.0
2 x 1 1/4 x 2 in. LF Brass Tee 6.7 14.9
2 x 1 1/2 x 1 in. LF Brass Tee 6.2 7.7
2 x 1 1/2 x 1 1/4 in. LF Brass Tee 6.3 9.5
2 x 1 1/2 x 1 1/2 in. LF Brass Tee 6.4 11.2
2 x 1 1/2 x 2 in. LF Brass Tee 6.5 14.6
2 x 2 x 1 in. Polymer Tee 3.2 9.0
2 x 2 x 1 1/4 in. LF Brass Tee 1.9 9.7
2 x 2 x 1 1/2 in. LF Brass Tee 1.9 10.9
2 x 2 x 2 in. Polymer Tee 4.0 25.3
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