Introduction

In this section we have covered couplings to join glass process plant and pipeline components with other metal equipments.The complete coupling includes two flanges, two inserts, the necessary numbers of nuts, and bolts to join them together.

The couplings designed for use with glass process plant and components are of major importance from two main point of view.

  • They must ensure that the bolt load applied to the joint is sufficient to make an effective seal whilst not inducing undue stress in the glass.
  • They must be totally reliable in all service conditions.

Couplings & Gaskets

A Complete coupling consists of two backing flanges, two inserts and the appropriate number of nuts, bolts with PTFE 'O' ring. It is a complete set of flanges required to make a joint.

BACKING FLANGES
DN CAT.REF. QTY
15 HCF07 2
25 HCF1 2
40 HCF 1.5 2
50 HCF 2 2
80 HCF 3 2
100 H CF 4 2
150 HCF 6 2
225 HCF 9 2
300 HCF 12 2
400 HCF 16 2
450 HCF 18 2
600 HCF 24 2
INSERT
CAT.REF. QTY
HCN07 2
HCN1 2
HCN 1.5 2
HCN 2 2
HCN 3 2
HCN 4 2
HCN 6 2
HCN 9 2
HCN 12 2
HCN 16 2
HCN 18 2
HCN 24 2
NUT & BOLTS
D L QTY
5/16" 2.5" 3
5/16" 2.5" 3
5/16" 2.5" 3
5/16" 2.5" 3
5/16" 3.5" 6
5/16" 3.5" 6
3/8" 3.5" 6
3/8" 5" 8
3/8" 5" 12
1/2" 8" 12
1/2" 8" 12
1/2" 8" 12
CAT.REF.
CAT.REF.
HCT07
HCT 1
HCT 1.5
HCT 2
HCT 3
HCT 4
HCT 6
HCT 9
HCT 12
HCT 16
HCT 18
HCT 24

* DN is the nominal size of coupling .

There are always applications where there is a need to open or close a coupling easily without using tools. Charging reaction vessels are an example of this. Quick release couplings provide this facility whilst securing the lower backing flange against falling down.

The flanges one of which has slotted bolt holes remains fixed on the glass and are separated by means of hinged quick release bolts and wingnuts.

Depending upon the frequency of opening, the sealing gasket may need regular renewal.

Backing flange forms an intergral part of the complete couplings detailed earlier in this chapter. Up to and including DN 450 it is one -piece unit and for DN-600 the flange is available in two pieces.

Baking flange is made from cast iron and is used with insert.


DN D H P.C.D. d x N TYPE CAT. REF.
15 70 10 50 6 X 3 A HCF07
25 90 10 70 9 X 3 A HCF1
40 105 10 86 9 X 3 A HCF 1.5
50 120 11 98 9 X 3 A HCF 2
80 155 12 133 9 X 6 A HCF 3
100 200 14 178 9 X 6 A HCF 4
150 280 15 254 11 X 6 A HCF 6
225 335 29 310 11 X 8 B HCF 9
300 420 35 394 11 X 12 B HCF 12
400 525 22 495 12 X 12 A HCF 16
450 630 38 585 14 X 12 B HCF 18
600 745 48 710 14 X 12 B HCF 24

* Stainless steel (S.S.) flanges can be made on request basis.

Insert is fitted between the flange and the glass buttress end and should always be renewed if a jointis dismantled.

Spilt ring type insert is used with backing flanges. It is made of cast iron asbestos rope. Non asbestos PTFE impregnated rope cab be supplied on request. Insert from ruber material can also be supplied on request.


DN mm D mm D1 mm H mm TYPE CAT. REF.
15 34 22 8 A HCN 07
25 50 36 8 A HCN 1
40 65 50 8 A HCN 1.5
50 79 62 8 A HCN 2
80 110 92 8 A HCN 3
100 146 122 8 A HCN 4
150 197 174 10 A HCN 6
225 275 240 10 A HCN 9
300 359 322 10 A HCN 12
400 474 431 12 A HCN 16
450 555 500 18 A HCN 18
600 684 634 18 B HCN 24

This flange is used to connected glass component to flange on other equipment where different bolt configurations and/or drilled PCD’S are required. This flange is made of castiron and supplied with a spilt ring.

Aluminium flange can also be supplied on request.Please mention Cat.Ref. HCFA for cast iron and HAFC for aluminium flange.

Adaptor backing flange is generally supplied un-drilled . However, if specified , this can be supplied drilled as per "Table E/F/ ASA150" standards.

UNDRILLED FLANGE
DN mm D mm D1 mm D2 mm H mm CAT. REF.
15 70 29 30 10 HCFA 07
25 115 43 51 10 HCFA 1
40 150 58 66 10 HCFA 1.5
25 115 43 51 10 HCFA 1
50 165 70 81 12 HCFA 2
80 200 101 112 12 HCFA 3
100 220 134 148 12 HCFA 4
150 285 186 196 15 HCFA 6
225 395 260 282 15 HCFA 9
300 445 342 363 18 HCFA 12
DRILLED TABLE -E
CAT.REF PCD n x Dø
HCFA07/E 67 4 x 12ø
HCFA 1/E 82 4 x 12ø
HCFA 1.5/E 98 4 x 12ø
HCFA 2/E 114 4 x 16ø
HCFA 3/E 146 4 x 16ø
HCFA 4/E 178 8 x 16ø
HCFA 6/E 235 8 x 19ø
HCFA 9/E 324 12 x 19ø
HCFA 12/E 406 12 x 23ø
DRILLED TABLE -F
CAT.REF PCD n x Dø
HCFA07/F 67 4 x 16ø
HCFA 1/F 87 4 x 16ø
HCFA 1.5/F 105 4 x 16ø
HCFA 2/F 127 4 x 16ø
HCFA 3/F 165 8 x 16ø
HCFA 4/F 190 8 x 16ø
HCFA 6/F 260 12 x 19ø
HCFA 9/F 356 12 x 23ø
HCFA 12/F 438 16 x 23ø
DRILLED TABLE -ASA150
CAT.REF PCD n x Dø
HCFA07/A 60 4 x 12ø
HCFA 1/A 79 4 x 12ø
HCFA 1.5/A 98 4 x 12ø
HCFA 2/A 121 4 x 16ø
HCFA 3/A 152 4 x 16ø
HCFA 4/A 190 8 x 16ø
HCFA 6/A 241 8 x 19ø
HCFA 9/A 298 8 x 19ø
HCFA 12/A 432 12 x 23ø

Bellow flange is used to fit a bellow to a glass component. This is made of cast iron and is used in HFBN, HVB, HFB type of bellows.

This is provided with a spilt ring.

DN D D1 D2 PCD d x N H CAT. REF
15 60 30 34 50 9 x 3 8 HBF07
25 90 44 54 70 9 x 3 8 HBF 1
40 105 59 66 86 9 x 3 9 HBF 1.5
50 121 71 80 98 9 x 3 10 HBF 2
80 155 102 115 133 9 x 6 10 HBF 3
100 200 135 146 178 9 x 6 10 HBF 4
150 274 186 202 254 10 x 6 10 HBF 6
225 340 260 275 310 10 x 8 11 HBF 9
300 425 340 363 394 11 x 12 15 HBF 12

This flange is made of cast iron and supplied with a spilt ring.

Aluminium flange can also be supplied on request. Please mention Cat.Ref. HCFA for cast iron and HAFC for aluminium flange.

Adaptor backing flange is generally supplied un-drilled . However, if specified , it can be supplied drilled as per "Table E/F/ ASA150" standards.


Undrilled Flange
DN
MM
D
MM
D1
MM
D2
MM
H
MM
CAT. REF.
15 70 29 30 7 HBFA07
25 115 44 53 7 HBFA1
40 150 59 65 9 HBFA1.5
50 165 70 87 8 HBFA2
80 200 104 115 9 HBFA3
100 220 133 149 9 HBFA4
150 285 189 204 11 HBFA6
225 395 261 280 12 HBFA9
300 445 342 363 12 HBFA12
DRILLED TABLE -E
CAT.REF PCD n x Dø
HBFA07/E 67 4 x 12ø
HBFA 1/E 82 4 x 12ø
HBFA 1.5/E 98 4 x 12ø
HCFA 2/E 114 4 x 16ø
HBFA 3/E 146 4 x 16ø
HBFA 4/E 178 8 x 16ø
HBFA 6/E 235 8 x 19ø
HBFA 9/E 324 12 x 19ø
HCFA 12/E 406 12 x 23ø
DRILLED TABLE -F
CAT.REF PCD n x Dø
HBFA07/F 67 4 x 16ø
HBFA 1/F 87 4 x 16ø
HBFA 1.5/F 105 4 x 16ø
HBFA 2/F 127 4 x 16ø
HBFA 3/F 165 8 x 16ø
HBFA 4/F 190 8 x 16ø
HBFA 6/F 260 12 x 19ø
HBFA 9/F 356 12 x 23ø
HBFA 12/F 438 16 x 23ø
DRILLED TABLE -ASA150
CAT.REF PCD n x Dø
HBFA07/A 60 4 x 12ø
HBFA 1/A 79 4 x 12ø
HBFA 1.5/A 98 4 x 12ø
HBFA 2/A 121 4 x 16ø
HBFA 3/A 152 4 x 16ø
HBFA 4/A 190 8 x 16ø
HBFA 6/A 241 8 x 19ø
HBFA 9/A 298 8 x 19ø
HBFA 12/A 432 12 x 23ø

Compression spring is used to set the correct bolt load and to maintain it after the gasket has settled, thus ensuring that the coupling remains leak-free. Standard compression spring has a corrosion resistant coating and is also available in stainless steel.


DN FREE L INSTALLED L CAT. REF.
25-100 14.5 11.0 HDF 8.5
150-300 22.0 18.0 HDF 10.5
450-600 28.7 22.7 HDF 13

PTFE 'O' ring is the most widely used gaskets in glass fittings. It is provided with a locking collar which helps to lock the two glass surfaces correctly.


DN mm D mm D1 mm d mm L mm CAT. REF.
15 29 23 3 5 HTR07
25 42 33 3 5 HTR 1
40 57 48 3 5 HTR 1.5
50 70 59 3 5 HTR 2
80 100 88 3 5 HTR 3
100 134 119 4 6 HTR 4
150 186 168 4 6 HTR 6
225 260 236 4 7 HTR 9
300 342 318 4 7 HTR 12
400 467 455 6 7 HTR 16
450 537 490 6 7 HTR 18
600 686 640 6 7 HTR 18
600 686 640 8 10 HTR 24

This gasket takes the form of a PTFE sheath fitted over a compressed asbestos fiber gasket.When using this type of gasket, a higher bolting force is required for DN 450 and above. Please consult our Technical Department for further information.


DN CAT. REF.
25 HTMP 1
40 HTMP 1.5
40 HTMP 1.5
50 HTMP 2
80 HTMP 3
100 HTMP 4
150 HTMP 6
225 HTMP 9
300 HTMP 12
450 HTMP 18
600 HTMP 24

PTFE bellow is an important support in the construction of glass plant and pipeline. It can be used to compensate for different thermal movement between glass and associated equipments, absorb vibrations from associated equipments or foundations. In particular, bellow can be used for connecting glass to other material.

When bellow is used, the support and restraint of the glass should be such that the force resulting from pressure/vacuum in the pipeline and forces resulting from movement of the bellows do not result in undue stresses in the glass.

The maximum operating temperature for PTFE bellow is 200 C. Bellow DN 80 and above should not be used under vacuum. For such application we recommend the use of vacuum bellow as detailed on the following page.


Permissible operating conditions for HBFN bellow
DN 20°C 100°C 160°C 200°C
15 -1 / +4 -1 / +3 -1 / +1,5 unpressurised
25 -1 / +4 -1 / +3 -1 / +1,5 unpressurised
40 -1 / +4 -1 / +3 -1 / +1,5 unpressurised
50 -1 / +4 -1 / +2 -1 / +1 unpressurised
80 -1 / +3 -1 / +2 -1 / +1 unpressurised
100 -1 / +2 -1 / +2 -0 / +1 unpressurised
150 -1 / +2 -1 / +1,5 -0 / +0,7 unpressurised
200 -1 / +1 -1 / +1 -0 / +0,5 unpressurised
300 -1 / +1 -1 / +0,7 -0 / +0,3 unpressurised
Permissible operating conditions for HVBN bellow
DN 20°C 100°C 160°C 200°C
80 -1 / +3 -1 / +2 -1 / +1' unpressurised
100 -1 / +2 -1 / +2 -1 / +1' unpressurised
150 -1 / +2 -1 / +1,5 -1 / +0,7 unpressurised
200 -1 / +2 -1 / +1 -1 / +0,5 unpressurised
300 -1 / +1 -1 / +0,7 -1 / +0,3 unpressurised

DN D D1 D2 L CAT.REF.
15 65 28 21 60 HFBN 1
25 95 41 31 60 HFBN 1
25 95 41 31 60 HFBN 1
40 105 56 43 60 HFBN 1.5
50 121 69 55 60 HFBN 2
80 155 98 82 65 HFBN 3
100 200 132 111 65 HFBN 4
150 274 184 162 65 HFBN 6
225 340 258 230 65 HFBN 9
300 425 340 308 65 HFBN 18
300 425 340 308 65 HFBN 18

*Tolerances for above bellows in length is ±3mm .


DN D D1 D2 L CAT.REF.
15 65 28 21 60 HFBF1
25 95 41 31 60 HFBF1
40 105 56 43 60 HFBF1.5
50 121 69 55 60 HFBF2
80 155 98 82 65 HFBF3
100 200 132 111 65 HFBF4
150 274 184 162 65 HFBF6
225 340 258 230 65 HFBF9
300 425 340 308 65 HFBF18

*Tolerances for above bellows in length is ±3mm .


DN D D1 D2 L L1 CAT. REF.
80 155 98 82 70 5 HVBN 3
100 200 132 111 70 5 HVBN 4
150 275 184 162 70 5 HVBN 6
225 350 258 230 70 5 HVBN 9
300 425 340 308 70 5 HVBN 12

*Tolerances for above bellows in length is ±3mm .


DN D D1 D2 L L1 CAT.REF.
80 155 98 82 70 5 HVBF 3
100 200 132 111 70 5 HVBF 4
150 275 184 162 70 5 HVBF 6
225 350 258 230 70 5 HVBF 9
300 425 340 308 70 5 HVBF 12

Bellows can be supplied with undrilled adaptor flanges. However , if specified , these bellows can be supplied drilled as per " Table E" , Table F" and "ASA150 " Standards. * Tolerances for above bellows in length is ±3mm and diameter as per the glass buttress end tolerance.

This component is used as interface spacer when connecting glass flat buttress end component to other process plant, pipeline and glass - lined reaction vessel. A combination of steel, rubber and PTFE provide an ideal sealing surface with only PTFE coming into contact with the process fluids to maintain resistance to corrosion.


DN CAT. REF
25 HEMP 1
40 HEMP 1.5
50 HEMP 2
80 HEMP 3
100 HEMP 4
150 HEMP 6
225 HEMP 9
300 HEMP 12
450 HEMP 18
600 HEMP 24

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