���

�

Product

FRP�Backin

CBTFEW

t�Name�

ng��Flange�

CHEMICAL�PRB.S.D.�Marg,�Tel.:�+�91�22�6Fax:�+�91�22�6E�mail�:�salesWebsite�:�ww

PressureRating

PN�10/PN�1

ROCESS�PIPIGovandi�(E)�67230600��67230618�@cppiping.cww.cppiping.

�

e�Drillin

16� ANSI�B

NG�PVT.�LTDMumbai�–�40

com���������com�

g�Std.� Dia

B�16.5� DN

D.�00�088�

ameter�Rang

N�25�–�DN�30

ge�ThicknFlange

00� 14mm�t

ness�of�e�Range�

to�46mm�

Page�2�of�2

INTRODUCTION

Chemical Process Piping Pvt. Ltd. (CPP) is a Pioneers and Market leader in the field of

Design, Manufacture & Erection of Fiberglass Reinforced Plastic FRP, GRE, UPVC/FRP,

PP/FRP, PVDF/FRP, CPVC/FRP Pipes and fittings in India, serving the industry for five

decades.

CPP have supplied critical piping to various countries such as Germany, UAE, Qatar, Saudi

Arabia, Jordan, Singapore, Thailand, Indonesia, Australia, etc. CPP is Market leader in the

supply and Installation of GRP Piping and Headers for Chlor-Alkali Membrane Cell Plants in

India and Middle East. Major consultants/ EPC contractors have placed their confidence on

CPP for their requirement of GRP Pipes and Fittings. Our experience of over 50 years in

serving the chemical and allied industry worldwide has helped us to better understand the

requirements of the Water, Power, Oil & Gas Industries.

CPP has commissioned a state-of-the-art a Flange Machine to manufacture FRP Backing

Flanges to match international standards & specification using high strength fiberglass

reinforcement impregnated with polyester resin. Backing Flanges are manufactured using

high capacity presses at elevated temperatures. The Press Machine temperature is controlled

by PLC and is equipped with a cooling system. The flanges have been tested extensively at

our in-house laboratory resulting in the most optimally designed flanges for chemical, power,

water, desalination, oil and gas industries.

Page�3�of�3

1. Scope

1.1 This specification covers FRP Backing flanges size up to DN 300 and includes requirements for materials, workmanship, performance, testing and dimensions.

1.2 Backing Flange are manufactured using high capacity presses at elevated temperature. The Press Machine Temperature is controlled by PLC and is equipped with Cooling System for faster turn around.

2. Referenced Documents

2.1 ANSI B16.5 2.2 ASTM D 2992 2.3 ASTM D 1599

3. Materials and Manufacture

3.1 FRP Backing Flanges manufactured in accordance with this specification are made of layers of high strength chopped strand mats and woven rovings impregnated with polyester resin by applying external pressure and heat. The laminates contains approximate 50% fiberglass (±) 10%. & 50% Resin (±) 10%.

4. FRP Backing Flanges Material Properties:-

No. Properties Unit Values

1 Tensile Axial Strength N/mm² 80 to 100

2 Glass Content % 50% (±) 10%.

3 Breaking Pressure Bar.g Minimum 3 times of rated Pressure Rating

4 Torque N.m Please See Table 1

5. Advantages:-5.1 Corrosion Resistant 5.2 UV Resistant 5.3 Lightweight5.4 Maintenance free 5.5 Can sustain high Torque 5.6 Can be pigmented to any color

6. Performance Requirements

6.1 FRP Backing Flanges are designed to meet the following performance requirements according to the CPP recommended practice for field installation.

6.1.1 Sealing — FRP Backing Flanges are designed to withstand a pressure of at least 1.5 times the rated design pressure without leakage.

Page�4�of�4

6.1.2 Short-Term Rupture Strength—FRP Backing Flanges are designed to withstand a hydrostatic Pressure/load of at least 3 times the rated pressure rating without damage to the flange.

6.1.3 Bolt Torque—Flanges are designed to withstand, a bolt torque of at least 1.5 times of the recommended torque for sealing of the flange at its rated pressure. Table 1 gives the recommended torque values for flange bolting.

Table 1: Recommended Torque Values For Flange Bolting

Backing Flanges with Flat Ring type.

NOMINAL BORE(mm)

BOLTINGTORQUE (Nm)

Recommended Maximum

25 M12 25 40

40 M12/ M16 25 40

50 M16 30 50

80 M16 30 50

100 M16 30 50

125 M16/ M20 40 75

150 M20 40 80

200 M20 40 80

250 M20 / M24 50 100

300 M20 / M24 60 120

Note: - The above torque values are based on using EPDM Gaskets of 6 mm thickness with 1.5 mm thk carbon steel inserted. Hardness of the gaskets is 55º to 650 shore A.

Special Note: These stress levels are nominal insofar as they may have to be exceeded in practice to provide against all conditions that tend to produce a leaking joint. However, there is sufficient margin to provide a satisfactory closure without having to overload or continually retighten the bolts. Torque spanners or other means for preventing the application of excessive load either on the bolt or flange may be necessary.

Page�5�of�5

7. Dimensions

7.1 Dimensions and Tolerances:

Table 2.

300 ± 1.5 44

± 2.0

483 ± 3.0 350

± 1.0

432

± 1.6

12 - 25.4 5.39

250

± 1.0

42 406

± 1.0

294 362 12 - 25.4 3.64

200 40 343 238 298 8 - 22.2 2.68 150 29 279 188 241 8 - 22.2 1.28 125 28 254 160 216 8 - 22.2 1.18

100

± 0.5

26 229 133 190 8 - 19.0 1.02 80 23 191 111 152 4 - 19.0 0.6 50 18 152 82 121 4 - 19.0 0.3

40 17 127 68 98 4 - 15.9 0.2 25 16 108 50 79 4 - 15.9 0.15

NB TOL. T1 TOL. OD Ø TOL.Flange

ID TOL. PCD Ø TOL. Nos x Ø

* Wt (~)

kg/No.

* Please note that above mentioned weights are approximate and may vary.

7.1.1 Flange and Bolt Dimensions— The tolerance for the flange dimensions are provided in Table 1. The flange inside dia & outside dia as per ANSI B16.5.

8. Workmanship, Finish, and Appearance

8.1 FRP Backing Flanges are free from defect such as de-laminations.

9. Test Methods

9.1 Chemical Process Piping CPP, LTD has successfully carried out in-house hydrostatic long-term tests as per ASTM D 2992, method B in order to confirm the 1000 Hrs. survival test on FRP Backing Flange under constant hydrostatic internal pressure at 66º C temperature. 6 Nos of individual specimens have been tested at different hydrostatic internal pressure levels to determine their time-to-failure points. In this context, the time-to-failure points have to meet a specified distribution.

9.2 Chemical Process Piping CPP, LTD has successfully carried out breaking test on FRP Backing Flanges as per ASTM D 1599.

(Figure 1)�

�

�

10. Flan

10.1

10.2

10.3

10.4

�

nge Bolt Ti

1 The first psecond bodirectly acshows Fla

2 When tigh

3 Bolt Tight

4 Bolt Tight

ightening S

pass, lightly olt, then mocross for the ange Bolt Tig

htening a fou

tening Seque

tening Seque

Bolt Tig

�

Sequence

tighten the fve 1/4 turn fourth. Con

ghtening Seq

ur-bolt flange

ence for flang

ence for flang

ghtening Seq

Flange Bol

Page�6�of�6

first bolt thenaround the

ntinue this sequence.

e (Figure 3),

ges using 8 b

ges using 12

Figure 3quence for F

Figure 2lt Tightenin

n move direccircle or 90

equence until

use a criss-c

bolts (Figure

bolts (Figur

Flanges using

ng Sequence

ctly across o0 degrees fol all bolts ar

ross pattern.

4).

re 5).

g 4 Bolts.

�

r 180 degreeor the third re tightened.

�

es for the bolt and Figure 2

�

�

�

�Bolt Tigh

Bolt Tig

htening Sequ

ghtening Seq

Page�7�of�7

����

Figure 5uence for Fl

Figure 4quence for F

langes using

Flanges using

g 12 Bolts.

g 8 Bolts.

�

� �