NOT to be distributed outside of FM Approvals and its affiliates except by CUSTOMER. APPROVAL REPORT FM Approvals 1151 Boston-Providence Turnpike P.O. Box 9102 Norwood, MA 02062 Page 1 of 11 Pipe Fittings for Use in Aboveground Sprinkler Systems Model Types: XGQT01, XGQT02, XGQT03, XGQT04, XGQT05, XGQT06, XGQT07 and XGQT10 Various sizes Rigid and Flexible Grooved End Couplings for Use in Aboveground Sprinkler Systems Model Types: XGQT1 and XGQT2 10 and 12 inch NPS Prepared for: Shanghai Recomb Piping System Co., Ltd. No. 270 Yixian Rd. Shanghai, 200434 P.R. China Project ID. 3036892 Class: 1920 Date of Approval: August 12, 2011 Authorized by: Richard Dunne, Manager, Fire Protection Group
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NOT to be distributed outside of FM Approvals and its affiliates except by CUSTOMER.
APPROVAL REPORT
FM Approvals
1151 Boston-Providence Turnpike
P.O. Box 9102
Norwood, MA 02062
Page 1 of 11
Pipe Fittings for Use in Aboveground Sprinkler Systems Model Types: XGQT01, XGQT02, XGQT03, XGQT04, XGQT05, XGQT06, XGQT07 and XGQT10 Various sizes Rigid and Flexible Grooved End Couplings for Use in Aboveground Sprinkler Systems Model Types: XGQT1 and XGQT2 10 and 12 inch NPS Prepared for: Shanghai Recomb Piping System Co., Ltd. No. 270 Yixian Rd. Shanghai, 200434 P.R. China Project ID. 3036892 Class: 1920 Date of Approval: August 12, 2011
Authorized by: Richard Dunne, Manager, Fire Protection Group
FM APPROVALS
Project ID: 3036892
Page 2 of 11
Pipe Fittings for Use in Aboveground Sprinkler Systems
Model Types: XGQT01, XGQT02, XGQT03, XGQT04, XGQT05, XGQT06, XGQT07 and XGQT10
Rigid and Flexible Grooved End Couplings for Use in Aboveground Sprinkler Systems
Model Types: XGQT1 and XGQT2
10 and 12 inch NPS
August 12, 2011
from
Shanghai Recomb Piping System Co., Ltd.
No. 270 Yixian Rd.
Shanghai, 200434
P.R. China
I INTRODUCTION
1.1 Shanghai Recomb Piping Systems Co., Ltd. requested an examination to increase the rated working
pressure for the following grooved fittings manufactured at Shanghai Recomb Piping System Co.,
Ltd.:
Model Number Description
XGQT01 Standard 90o Elbow
XGQT02 Standard 45o Elbow
XGQT03 Standard Equal Tee
XGQT04 Reducing Tee
XGQT05 Standard Cross
XGQT06 Standard Cap
XGQT07 Concentric Reducer
XGQT10 Standard 22.5o Elbow
1.2 Shanghai Recomb Piping Systems Co., Ltd. requested an examination to increase the rated working
pressure for the following grooved end couplings manufactured at Shanghai Recomb Piping System
Co., Ltd.:
Model Number Description
XGQT1 Standard Rigid Coupling
XGQT2 Standard Flexible Coupling
1.3 This Report may be freely reproduced only in its entirety and without modification.
1.4 Standards:
Title Class Number Date
Pipe Couplings and Fittings for
Aboveground Fire Protection Systems
1920
November 2007
FM APPROVALS Project ID: 3036892
Page 3 of 11
1.5 Listing:
1.5.1 The listing for the Model XGQT1 standard rigid grooved couplings currently shown in the Automatic
Sprinkler Systems’ section of the FM Approval Guide, an online resource of FM Approvals, under the
heading “Grooved Couplings, Standard - Flexible”, will be modified to include the increased rated
working pressures discussed in this Report as shown in Appendix I.
1.5.2 The listing for the Model XGQT2 standard flexible grooved couplings currently shown in the
Automatic Sprinkler Systems’ section of the FM Approval Guide, an online resource of FM
Approvals, under the heading “Grooved Couplings, Standard - Flexible”, will be modified to include
the increased rated working pressures discussed in this Report as shown in Appendix II.
1.5.3 The listings for the pipe fittings discussed in section 1.1 of this Report, currently shown in the
Automatic Sprinkler Systems’ section of the FM Approval Guide, an online resource of FM
Approvals, under the heading “Pipe Fittings”, will be modified to include the increased rated working
pressures discussed in this Report as shown in Appendix III.
II DESCRIPTION
2.1 Description
2.1.1 Rigid and Flexible Grooved End Couplings
Design features of the Model XGQT1 rigid and Model XGQT2 flexible grooved end couplings
discussed in this Report remain unchanged and are as discussed in the following FM Approval
Reports listed in Table 2.1.1.
Table 2.1.1
P.I. Number Report Date
3017542 10-23-2003
3021930 11-18-2004
3023009 2-24-2005
3023870 6-13-2005
3026440 12-14-2007
3026458 4-11-2006
3034639 6-8-2011
2.1.2 Grooved Pipe Fittings
All the design features of the grooved pipe fittings discussed in this Report remain unchanged and are
as discussed in the following FM Approval Reports listed in Table 2.1.2.
Table 2.1.2
P.I. Number Report Date
3015750 5-12-2003
3018674 12-12-2003
3023009 2-24-2004
FM APPROVALS Project ID: 3036892
Page 4 of 11
3023870 6-13-2005
3026458 4-11-2006
3032589 4-22-2008
2.2 Rated Working Pressure
2.2.1 0.188 inch wall and Schedule 40 Standard Sprinkler Pipe
The rated working pressure of the 10 and 12 inch NPS Model XGQT1 and XGQT2 grooved rigid and
flexible couplings discussed in this Report, when used with 0.188 inch wall and Schedule 40 steel
sprinkler pipe, are detailed below in Table 2.2.1.
Table 2.2.1
Product
Designation
Nominal Pipe
Size, in.
Max Working Pressure,
psi (kPa) Comments
XGQT1 10 200
(1380)
For use with rolled groove 0.188” wall
Standard Sprinkler Pipe
XGQT1 10 400
(2760)
For use with rolled and cut groove Schedule
40 Standard Sprinkler Pipe
XGQT2 10 300
(2070)
For use with rolled groove 0.188” wall
Standard Sprinkler Pipe
XGQT2 10 500
(3450)
For use with rolled and cut groove Schedule
40 Standard Sprinkler Pipe
XGQT1 12 250
(1725)
For use with rolled groove 0.188” wall
Standard Sprinkler Pipe
XGQT1 12 400
(2760)
For use with rolled and cut groove Schedule
40 Standard Sprinkler Pipe
XGQT2 12 250
(1725)
For use with rolled groove 0.188” wall
Standard Sprinkler Pipe
XGQT2 12 500
(3450)
For use with rolled and cut groove Schedule
40 Standard Sprinkler Pipe
2.2.2 Pipe Fittings
The rated working pressure of the pipe fittings discussed in Section 1.1 of this Report are detailed
below in Table 2.2.2.
Table 2.2.2
Product Designation Nominal Pipe Size,
in.
Max Working Pressure,
psi (kPa)
XGQT01
1, 1-1⁄4, 1-1⁄2, 2, 2-1⁄2,
3, 4, 6, 8
400
(2760)
5 500
(3450)
10, 12 300
(2070)
FM APPROVALS Project ID: 3036892
Page 5 of 11
XGQT02
1, 1-1⁄4, 1-1⁄2, 2, 2-1⁄2,
3, 4, 6, 8
400
(2760)
5 500
(3450)
10, 12 300
(2070)
XGQT03
1, 1-1⁄4, 1-1⁄2, 2, 2-1⁄2,
3, 4, 6, 8
400
(2760)
5 500
(3450)
10, 12 300
(2070)
XGQT04
2 x 1-1/2;
2-1/2 x 2;
3 x 2-1/2;
4 x 2, 2-1/2, 3;
6 x 2-1/2, 3, 4;
8 x 4, 6
400
(2760)
XGQT05
1, 1-1⁄4, 1-1⁄2, 2, 2-1⁄2,
3, 4, 6, 8
400
(2760)
5 500
(3450)
XGQT06
1, 1-1⁄4, 1-1⁄2, 2, 2-1⁄2,
3, 4, 6, 8
400
(2760)
5 500
(3450)
10, 12 300
(2070)
XGQT07
2 x 1-1/2;
2-1/2 x 2;
3 x 2, 2-1/2;
4 x 2, 2-1/2, 3;
6 x 4;
8 x 6
400
(2760)
5 500
(3450)
XGQT10
1, 1-1⁄4, 1-1⁄2, 2, 2-1⁄2,
3, 4, 6, 8
400
(2760)
5 500
(3450)
10, 12 300
(2070)
III EXAMINATIONS AND TESTS
3.1 Examination
3.1.1 The manufacturer provided samples of the Model XGQT1 and XGQT2 grooved couplings in each
of the 10 through 12 inch NPS sizes as detailed below for examination and testing. The samples were
considered to be representative of the product line and were examined, tested, and compared to the
FM APPROVALS Project ID: 3036892
Page 6 of 11
manufacture's drawings. All data is on file at FM Approvals along with other documents and
correspondence applicable to this program.
3.1.2 Samples of various grooved pipe fittings were prepared and assembled into assemblies for testing as
outlined in Table 3.1.2 below. The samples were examined, tested and compared to the
manufacturer’s drawings. These samples were deemed to be representative of each of the grooved
pipe fittings discussed in this Report.
Table 3.1.2
Test Assembly,
inch Product Designation Nominal Pipe Size, Inch
2
XGQT01 - 90o Elbow 2
XGQT05 - Cross 2
XGQT03 - Equal Tee 2
2-1/2
XGQT01 - 90o Elbow 2-1/2
XGQT05 - Cross 2-1/2
XGQT04 - Reducing Tee 2-1/2 x 2
XGQT03 - Equal Tee 2-1/2
3
XGQT01 - 90o Elbow 3
XGQT04 - Reducing Tee 3 x 2-1/2
XGQT07 - Concentric Reducer 3 x 2
XGQT03 - Equal Tee 3
XGQT05 - Cross 3
4
XGQT01 - 90o Elbow 4
XGQT04 - Reducing Tee 4 x 3
XGQT07 - Concentric Reducer 4 x 3
XGQT03 - Equal Tee 4
XGQT05 - Cross 4
5
XGQT01 - 90o Elbow 5
XGQT05 - Cross 5
XGQT07 - Concentric Reducer 5 x 4
XGQT03 - Equal Tee 5
6
XGQT01 - 90o Elbow 6
XGQT04 - Reducing Tee 6 x 5
XGQT07 - Concentric Reducer 6 x 5
XGQT03 - Equal Tee 6
XGQT05 - Cross 6
8
XGQT01 - 90o Elbow 8
XGQT04 - Reducing Tee 8 x 6
XGQT07 - Concentric Reducer 8 x 6
XGQT03 - Equal Tee 8
XGQT05 - Cross 8
10
XGQT01 - 90o Elbow 10
XGQT02 - 45o Elbow 10
XGQT03 - Equal Tee 10
12
XGQT01 - 90o Elbow 12
XGQT02 - 45o Elbow 12
XGQT03 - Equal Tee 12
FM APPROVALS Project ID: 3036892
Page 7 of 11
3.2 Hydrostatic Strength
3.2.1 Model XGQT1 Rigid Grooved Couplings
Samples of the Model XGQT1 rigid grooved coupling were assembled to two short lengths of steel
pipe and were subjected to hydrostatic strength testing. With both ends capped, the assemblies were
filled with water, making sure all air was vented out of the assembly and subjected to a hydrostatic
pressure of four times the rated working pressure, for 5 minutes. A list of the pipe and coupling
assemblies, that were tested, are listed in Table 3.2.1. There were no signs of cracking or permanent
distortion of any assembly as a result of this test. These results are considered satisfactory.
Table 3.2.1
XGQT1 Rigid Grooved Coupling
Size Coupling
(inch NPS) Pipe Used During Test
Rated Working Pressure
psi (kPa)
Test Pressure
psi (kPa)
10 0.188 inch wall 200 (1375) 800 (5515)
10 Schedule 40 400 (2760) 1600 (11 030)
12 0.188 inch wall 250 (1725) 1000 (6895)
12 Schedule 40 400 (2760) 1600 (11 030)
3.2.2 Model XGQT2 Flexible Grooved Couplings
Samples of the XGQT2 flexible grooved coupling were assembled to two short lengths of steel pipe
and were subjected to hydrostatic strength testing. With all ends capped, the assemblies were filled
with water, making sure all air was vented out of the assembly and subjected to a hydrostatic pressure
of four times the rated working pressure, for 5 minutes. A list of the pipe and coupling assemblies,
that were tested, are listed in Table 3.2.2. There were no signs of cracking or permanent distortion of
any assembly as a result of this test. These results are considered satisfactory.
Table 3.2.2
XGQT2 Flexible Grooved Coupling
Size Coupling
(inch NPS) Pipe Used During Test
Rated Working Pressure
psi (kPa)
Test Pressure
psi (kPa)
10 0.188 inch wall 300 (2070) 1200 (8275)
10 Schedule 40 500 (3450) 2000 (13 790)
12 0.188 inch wall 250 (1725) 1000 (6895)
12 Schedule 40 500 (3450) 2000 (13 790)
3.2.3 Grooved Pipe Fittings
Each of the test assemblies listed in Section 3.1.2 of this Report were subjected to hydrostatic strength
testing. With all ends capped, the assemblies were filled with water, making sure all air was vented
out of the assembly and subjected to a hydrostatic pressure of four times the rated working pressure,
for 5 minutes. A list of the pipe and coupling assemblies, that were tested, are listed in Table 3.2.3.
There were no signs of cracking or permanent distortion of any assembly as a result of this test. These
results are considered satisfactory.
FM APPROVALS Project ID: 3036892
Page 8 of 11
Table 3.2.3
Grooved Pipe Fittings
Test Assembly Size Rated Working Pressure
psi (kPa)
Test Pressure
psi (kPa)
2 400 (2760) 1600 (11 030)
2-1/2 400 (2760) 1600 (11 030)
3 400 (2760) 1600 (11 030)
4 400 (2760) 1600 (11 030)
5 500 (3450) 2000 (13 790)
6 400 (2760) 1600 (11 030)
8 400 (2760) 1600 (11 030)
10 300 (2070) 1200 (8275)
12 300 (2070) 1200 (8275)
3.3 Bending Moment Resistance
3.3.1 Model XGQT1 Rigid Grooved Couplings
The samples described in Section 3.3.1 of this Report were assembled to two lengths of steel pipe and
subjected to bending moment resistance testing. The assemblies were filled with water and subjected
to an internal pressure equal to their corresponding rated working pressure, as described in Table
2.2.1. The assemblies were placed in a fixture that provided support at a spacing of 60 inches (1.5 m)
and were positioned so that the test coupling was centered between the supports. The required
bending moments are detailed in Table 3.3.1. There was no leaking or evidence of failure observed at
the required bending moments. The required moments were calculated based upon a hanger spacing of
15 ft. (4.57 m), assumption of a missing hanger and a safety factor of two. The pipe weights were
used in the calculation of these values were that of water-filled Schedule 40 pipe to simulate a worst
case condition of a system incorporating a non-homogeneous selection of pipe. These test results are