GB2061759A - Process vessels for use in the chemical industry - Google Patents

Process vessels for use in the chemical industry Download PDF

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Publication number
GB2061759A
GB2061759A GB8028773A GB8028773A GB2061759A GB 2061759 A GB2061759 A GB 2061759A GB 8028773 A GB8028773 A GB 8028773A GB 8028773 A GB8028773 A GB 8028773A GB 2061759 A GB2061759 A GB 2061759A
Authority
GB
United Kingdom
Prior art keywords
sleeve
vessel
ring
repair
flange
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB8028773A
Other versions
GB2061759B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Glaxo Group Ltd
Original Assignee
Glaxo Group Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Glaxo Group Ltd filed Critical Glaxo Group Ltd
Publication of GB2061759A publication Critical patent/GB2061759A/en
Application granted granted Critical
Publication of GB2061759B publication Critical patent/GB2061759B/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/0053—Details of the reactor
    • B01J19/0073—Sealings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/0053—Details of the reactor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/02—Apparatus characterised by being constructed of material selected for its chemically-resistant properties
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
    • C23D13/00—After-treatment of the enamelled articles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
    • F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
    • F16L58/18—Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings
    • F16L58/187—Protection of pipes or pipe fittings against corrosion or incrustation specially adapted for pipe fittings for flanged joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/02—Apparatus characterised by their chemically-resistant properties
    • B01J2219/0204—Apparatus characterised by their chemically-resistant properties comprising coatings on the surfaces in direct contact with the reactive components
    • B01J2219/0209—Apparatus characterised by their chemically-resistant properties comprising coatings on the surfaces in direct contact with the reactive components of glass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/02—Apparatus characterised by their chemically-resistant properties
    • B01J2219/0204—Apparatus characterised by their chemically-resistant properties comprising coatings on the surfaces in direct contact with the reactive components
    • B01J2219/0213—Apparatus characterised by their chemically-resistant properties comprising coatings on the surfaces in direct contact with the reactive components of enamel

Abstract

In a repair sleeve (4) for a glass enamel chemical process vessel (1), an outwardly directed flange (5) is located at one end of the sleeve (4) and is arranged to extend over an end of a vessel (1) to be repaired. The sleeve (4) is surrounded by an elastomeric ring (6) in an expanded condition. The ring (6) is positioned near the flange end of the sleeve and is located in a groove or other retaining abutment to limit movement of the ring (6) towards the flange (5) when the sleeve is inserted in a vessel (1). The ring (6) projects outwards beyond the abutment into contact with the interior of the vessel. <IMAGE>

Description

SPECIFICATION Process vessels for use in the chemical industr, This invention relates to glass enamelled process vessels for use in the chemical industry, and, in particular, to repair sleeves for use in such vessels.
Glass enamelled process vessels are usually made of steel with a glass enamelled coating on the surface of the vessel which is, in use, to be exposed to chemicals. The glass enamelled coating often becomes damaged in such a way as to leave the metal of the vessel exposed to the chemicals. When this happens, the normal method of repair is to insert in the vessel a so-called repair sleeve which may be of tantalum or which may be of glass fibre reinforced furane resin material. The repair sleeve is cemented in place with an inert cement. Tantalum sleeves are extremely expensive and both the metal of the sleeve and the cement used to attach it to the vessel are subject to attack by some combinations of chemicals. Plastics repair sleeves are also limited in their chemical resistance and also rquire to be cemented in place.With both kinds of repair sleeves, there is a relatively difficult fitting and fixing operation and they are expensive to make and store.
An object of the present invention is to provide a way of avoiding this disadvantage.
According to the present invention there is provided a repair sleeve for a glass enamel chemical process vessel having an outwardly directed flange located at one end of the sleeve and adapted to extend over an end of a vessel to be repaired, an elastomeric ring surrounging the sleeve in an expanded condition near the flange end of the sleeve and a retaining abutment for the ring arranged between the ring and the flange to limit movement of the ring towards the flange when the sleeve is inserted in a vessel to be repaired, the ring projecting outwards beyond the abutment. The repair sleeve may have an annular groove near its flanged end and the elastomeric ring may be an O-ring located in the groove and project beyond the external surface of the sleeve.Alternatively, the retaining abutment may be a shoulder on the sleeve, beyond which shoulder the ring cannot pass when the sleeve is located in the process vessel. The repair sleeve is preferably of polytetrafluoroethylene (PTFE). The invention also provides a chemical process vessel lined with such a sleeve. Preferably, there are more than one ring each located in a groove or adjacent a retaining abutment and the rings are of such cross-sectional shape that they can roll. Suitable elastomeric materials include silicone polymers, neoprene, or natural or synthetic rubber. The particular elastomeric material used will depend on the intended use of the vessel.
Two embodiments of the invention are illustrated in the accompanying schematic drawings each of which illustrates a portion of a glass enamelled chemical process vessel fitted with a repair sleeve according to the present invention.
In the embodiment of the invention illustrated in Fig. 1, a chemical process vessel 1 has a glass enamel lining or coating 2. Such linings cir coatings can frequently become damaged thereby to expose the metal of the vessel as illustrated at 3. The present invention provides a repair sleeve 4 having a flange 5 at one end. The repair sleeves can be fitted into the vessel as shown in the drawing. The repair sleeve is made of PTFE which is a chemically inert material. The sleeve 4 has near its flanged end a plurality of external peripheral grooves in each of which is located an O-ring 6 of a suitable elastomeric material such as a silicone polymer, neoprene, or natural or synthetic rubber.
The relative sizes of the grooves and the rings 6 are such that the rings 6 are held in their grooves in an expanded condition. Furthermore, the outer surfaces of the rings 6 project beyond the outer surface of the sleeve 4 as clearly shown in the drawing. The external diameter of the rings when fitted in the grooves is greater than the internal diameter of the process vessel into which the sleeve is to be fitted. When it is desired to repair a vessel, the sleeve 4 can simply be inserted inside the vessel 1. When this is done there will be some compression of the rings 6 which will hold the sleeve firmly in place without it being necessary to use any cement.
In the embodiment illustrated in Fig. 2, a repair sleeve 7 has a flange 8 which can be fitted over the end of a process vessel 9. The sleeve has two shoulders 10 which form retaining abutments for elastomeric O-rings 11 and tapers between the shoulders. The shoulders 10 limit movement of the O-rings towards the flanged end of the sleeve 7 when the sleeve is fitted in the vessel 9. The external surfaces of the rings 11 project beyond the peripheries of the shoulders 10.
The vessel can therefore be repaired quickly, since there is no need to allow time for any cement to set, and easily.
1. A repair sleeve for a glass enamel chemical process vessel having an outwardly directed flange located at one end of the sleeve and adapted to extend over an end of a vessel to be repaired, an elastomeric ring surrounding the sleeve in an expanded condition near the flange end of the sleeve and a retaining abutment for the ring arranged between the ring and the flange to limit movement of the ring towards the flange when the sleeve is inserted in a vessel to be repaired,
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (6)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Process vessels for use in the chemical industr, This invention relates to glass enamelled process vessels for use in the chemical industry, and, in particular, to repair sleeves for use in such vessels. Glass enamelled process vessels are usually made of steel with a glass enamelled coating on the surface of the vessel which is, in use, to be exposed to chemicals. The glass enamelled coating often becomes damaged in such a way as to leave the metal of the vessel exposed to the chemicals. When this happens, the normal method of repair is to insert in the vessel a so-called repair sleeve which may be of tantalum or which may be of glass fibre reinforced furane resin material. The repair sleeve is cemented in place with an inert cement. Tantalum sleeves are extremely expensive and both the metal of the sleeve and the cement used to attach it to the vessel are subject to attack by some combinations of chemicals. Plastics repair sleeves are also limited in their chemical resistance and also rquire to be cemented in place.With both kinds of repair sleeves, there is a relatively difficult fitting and fixing operation and they are expensive to make and store. An object of the present invention is to provide a way of avoiding this disadvantage. According to the present invention there is provided a repair sleeve for a glass enamel chemical process vessel having an outwardly directed flange located at one end of the sleeve and adapted to extend over an end of a vessel to be repaired, an elastomeric ring surrounging the sleeve in an expanded condition near the flange end of the sleeve and a retaining abutment for the ring arranged between the ring and the flange to limit movement of the ring towards the flange when the sleeve is inserted in a vessel to be repaired, the ring projecting outwards beyond the abutment. The repair sleeve may have an annular groove near its flanged end and the elastomeric ring may be an O-ring located in the groove and project beyond the external surface of the sleeve.Alternatively, the retaining abutment may be a shoulder on the sleeve, beyond which shoulder the ring cannot pass when the sleeve is located in the process vessel. The repair sleeve is preferably of polytetrafluoroethylene (PTFE). The invention also provides a chemical process vessel lined with such a sleeve. Preferably, there are more than one ring each located in a groove or adjacent a retaining abutment and the rings are of such cross-sectional shape that they can roll. Suitable elastomeric materials include silicone polymers, neoprene, or natural or synthetic rubber. The particular elastomeric material used will depend on the intended use of the vessel. Two embodiments of the invention are illustrated in the accompanying schematic drawings each of which illustrates a portion of a glass enamelled chemical process vessel fitted with a repair sleeve according to the present invention. In the embodiment of the invention illustrated in Fig. 1, a chemical process vessel 1 has a glass enamel lining or coating 2. Such linings cir coatings can frequently become damaged thereby to expose the metal of the vessel as illustrated at 3. The present invention provides a repair sleeve 4 having a flange 5 at one end. The repair sleeves can be fitted into the vessel as shown in the drawing. The repair sleeve is made of PTFE which is a chemically inert material. The sleeve 4 has near its flanged end a plurality of external peripheral grooves in each of which is located an O-ring 6 of a suitable elastomeric material such as a silicone polymer, neoprene, or natural or synthetic rubber. The relative sizes of the grooves and the rings 6 are such that the rings 6 are held in their grooves in an expanded condition. Furthermore, the outer surfaces of the rings 6 project beyond the outer surface of the sleeve 4 as clearly shown in the drawing. The external diameter of the rings when fitted in the grooves is greater than the internal diameter of the process vessel into which the sleeve is to be fitted. When it is desired to repair a vessel, the sleeve 4 can simply be inserted inside the vessel 1. When this is done there will be some compression of the rings 6 which will hold the sleeve firmly in place without it being necessary to use any cement. In the embodiment illustrated in Fig. 2, a repair sleeve 7 has a flange 8 which can be fitted over the end of a process vessel 9. The sleeve has two shoulders 10 which form retaining abutments for elastomeric O-rings 11 and tapers between the shoulders. The shoulders 10 limit movement of the O-rings towards the flanged end of the sleeve 7 when the sleeve is fitted in the vessel 9. The external surfaces of the rings 11 project beyond the peripheries of the shoulders 10. The vessel can therefore be repaired quickly, since there is no need to allow time for any cement to set, and easily. CLAIMS
1. A repair sleeve for a glass enamel chemical process vessel having an outwardly directed flange located at one end of the sleeve and adapted to extend over an end of a vessel to be repaired, an elastomeric ring surrounding the sleeve in an expanded condition near the flange end of the sleeve and a retaining abutment for the ring arranged between the ring and the flange to limit movement of the ring towards the flange when the sleeve is inserted in a vessel to be repaired, the ring projecting outwards beyond the abutment.
2. A repair sleeve as claimed in Claim 1, wherein the elastomeric ring is an O-ring located in an annular groove near the flanged end of the sleeve and projecting beyond the external surface of the sleeve.
3. A repair sleeve as claimed in Claim 1, wherein the elastomeric ring is an O-ring located against a shoulder on the ring between the ring and the flanged end of the sleeve, the external surface of the ring projecting beyond the periphery of the shoulder.
4. A repair sleeve according to any of the preceding claims made of polytetrafluorethylene.
5. A process vessel for use in the chemical industry comprising a lining sleeve fitted inside the vessel and having an outwardly directed flange at one end extending over an end of the vessel, an elastomeric ring in an expanded condition surrounding the sleeve near the flanged end, and a retaining abutment for limiting movement of the ring towards the flanged end when the lining is inserted in the vessel, the external periphery of the ring projecting beyond the external periphery of the retaining abutment into contact with the interior wall of the vessel.
6. A repair sleeve for a glass enamel chemical process vessel substantially as described with reference to either of the figures of the accompanying drawings.
GB8028773A 1979-09-06 1980-09-05 Process vessels for use in the chemical industry Expired GB2061759B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7930911 1979-09-06

Publications (2)

Publication Number Publication Date
GB2061759A true GB2061759A (en) 1981-05-20
GB2061759B GB2061759B (en) 1983-08-24

Family

ID=10507646

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8028773A Expired GB2061759B (en) 1979-09-06 1980-09-05 Process vessels for use in the chemical industry

Country Status (3)

Country Link
DE (1) DE3033594A1 (en)
GB (1) GB2061759B (en)
NL (1) NL8005035A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104196884A (en) * 2014-07-16 2014-12-10 大连冶金轴承股份有限公司 Repairing method of sliding bearing bush of cylindrical grinding machine

Also Published As

Publication number Publication date
DE3033594A1 (en) 1981-09-10
NL8005035A (en) 1981-03-10
GB2061759B (en) 1983-08-24

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19980905