ULVAShield non-metallic cladding installation procedures rev7

Transcription

1 ULVAShield non-metallic cladding installation procedures 9-17-rev7

2 ULVAShield non-metallic cladding installation procedures 1.0 Introduction Properly applied and maintained, the ULVAShield system is proven to keep insulation dry, thereby preventing Corrosion Under Insulation (C.U.I.). The procedures outlined in this document define best practice for the installation of the ULVAShield system. The procedures focus on the importance of adhering to the correct methods of sealing, especially at terminations and penetrations, which have traditionally been problem areas when metallic jacketing has been used. These procedures ensure a watertight installation thus managing the prevention of CUI. Where practicable, normal industry standards with regard to water-shedding of overlaps should be adhered to. The ULVAShield system may only be installed by approved applicators that have been trained by ULVA Insulation Systems Ltd and have demonstrated competence. ULVA Insulation Systems Ltd offer training to applicators in the understanding and application of the ULVAShield system. The training course includes over the shoulder training on the work site to ensure learning outcomes from the training are being properly applied. The applicator then receives an approved applicator status badge with validity to demonstrate successful attendance of a training course. Supervision and inspection of ULVAShield installations is also provided by ULVA together with specific training for client or third party inspectors. This document is subject to review and the current revision is always available to download from Page 2

3 2.0 Quality Assurance The ULVAShield system has been specified in order to prevent corrosion under insulation. This is achieved by preventing water ingress. The application shall be made so as to deliver the required waterproofing integrity: Application shall be in accordance with best practice as defined by ULVA s Installation Procedures There shall be no substitution of any part of the system Application shall only be made by individuals that hold a valid photo I.D. card that has been issued by ULVA, following completion of training by ULVA, and that have demonstrated competence in application to best practice standards Applicator training will follow ULVA s training syllabus and shall include both classroom and practical workshop modules on a training pipe spool Trained applicators shall be assisted over the shoulder during live application on the project in order to ensure that the learning outcomes from the training are being applied For new construction projects the following groups shall undergo tailored training programmes: Applicators Applicator supervision and inspectors EPC contractor supervision and inspectors Client project team and inspectors ULVA will attend the project from time to time to assess application quality, identify visible snags and support all parties to ensure that what is envisaged in the specification is delivered on the project. Such visits will be as a representative of the Client and the frequency and duration will be agreed with the client. Page 3

4 ULVAShield non-metallic cladding installation procedures 3.0 Preparatory work prior to insulation installation 3.1 Packaging All insulation materials shall be packaged to prevent transit damage and ingress of moisture both during shipment and subsequent storage at site. All packaging to be clearly identified. 3.2 Storage On arrival, material shall be inspected by the insulation contractor to ensure that the material certification is correct. Material certificates shall be kept and handed over to the Development Project as part of the QA documentation at the end of the work. continuously above 60 C. All stainless steel pipe work which is to be heat traced, irrespective of operating temperature, shall be protected. Two protection methods are typical: (1) Use of a suitable coating (method for all pipe work except small bore instrument/impulse lines). (2) Wrapping by aluminium foil normally adopted on small bore instrument/impulse lines up to 50mm diameter. It is important to wrap the foil over the piping before the heat tracing is installed. All thermal insulation materials shall be dry on arrival and shall be stored in dry site storage facilities. All ULVAShield ancillary materials (ULVABond, ULVASeal etc) shall be stored between 5 C - 25 C. ULVAShield & ULVAForm should be stored at temperatures below 40 C (104 F) to prevent blocking of the materials to themselves whilst packaged and before application. 3.3 Transfer to Worksite All material transferred to the worksite shall be stored undercover at all times. Only material sufficient for one shift s work shall be transported to the worksite. 3.4 Encapsulation of the Worksite In inclement weather conditions, or if the application is being conducted in ambient temperatures below 5 Centigrade, a temporary enclosure/habitat shall be constructed to ensure that the insulation material is protected against ingress of rainwater and that the ULVAShield system is installed in temperatures not less than 5 Centigrade 3.5 Visual Inspection Before commencement of insulation and cladding works, whether new construction or existing, the client must ensure that all pipework and equipment is inspected and approved for insulation works to commence. This includes all coatings, trace heating etc. 3.6 Protection of Stainless Steel Lines It is essential to protect stainless steel lines which are covered by insulation. This is because of the risk of external pitting corrosion and external chloride stress corrosion cracking of austenitic stainless steels that operate Page 4

5 4.0 General Practices for Insulation Application 4.1 Installation of insulation shall be applied as per manufacturer s instructions ensuring that all surfaces being covered by the ULVAShield are clean, dry and free from dust, foreign matter and other contaminants with the following deviations: No wire reinforced insulation shall be used Banding wire shall not be used Stainless steel bands may be applied with a sacrificial rubbing patch of ULVAShield over the buckle No installation procedure and/or material shall compromise the integrity of the ULVAShield weatherproofing system. 4.2 Clearance for stud bolt removal shall be stud bolt length plus 12mm minimum unless specified otherwise. 4.3 Inspection plates, nameplates etc. should not be covered but bevelled away locally and sealed against moisture ingress. 4.4 All insulation where practical shall be secured by means of adhesive and not by mechanical methods i.e. banding, wire or clips unless approved by ULVA. Where insulation cannot be adhered, reinforced self-adhesive tapes are recommended. Where reinforced tapes are not permissible by the insulation manufacturer, metal banding is acceptable providing the banding has deburred edges and the buckle has a sacrificial rubbing strip applied over it to protect the ULVAShield cladding. The rubbing strip can be formed by a 10cm X 10cm patch of ULVAShield. Insulation retaining wire shall not be used without the approval of ULVA technical department and never as the final fixing method directly underneath the ULVAShield. 5.0 Insulation Application 5.1 Acoustic Insulation - ULVASound system ULVA Insulation Systems Ltd offers a range of independently certified acoustic systems compliant with ISO Irrespective of the ULVASound system selected for installation, the following application procedures apply: Insulation layers shall have butted longitudinal joints to achieve a smooth circular profile and all joints shall be staggered. Circumferential joints shall be staggered and also butted (not overlapped) Insulation layers shall be secured with reinforced filament adhesive tape ULVAMass HD layers can be installed with overlap (50mm min) on longitudinal joints, but butted joints are preferred, secured with reinforced filament adhesive tape. In multi-layer ULVAMass HD applications, circumferential joints shall be staggered. Page 5

6 ULVAShield non-metallic cladding installation procedures 2 4 Apply insulation with closely butted joints secured with filament tape at 50cm centres 3 ULVAMass HD Apply ULVAMass HD layers with offset, staggered joints secured with reinforced filament tape at 50cm centres. Page 6

7 6.0 ULVAShield application 6.1 Measure around the insulated pipe section to establish the circumference, then add 50mm to that for the overlap joint. This will give you the cutting size of the ULVAShield. Alternatively, ULVA can supply pre-cut blanks in accordance with material take offs Roll out a suitable length of ULVAShield off the roll to allow the cutting size to be marked directly onto the ULVAShield material. Mark the material with a fine tip marker pen. 6.3 Once the cutting size has been marked on the ULVAShield, using either a guillotine or scissors, cut out the required size/shape. 6.4 A trial (dry) fit of the ULVAShield should be made over the insulation material prior to the application of ULVABond to the overlapping joint. During the trial fit, ensuring the ULVAShield is square, mark out the overlap with a fine tip marker pen which will act as a guide when applying ULVABond (fig. 5). Ensure that all penetrations are marked and cut in the correct positions. Having completed the trial fit, ensure that the ULVAShield is clean, dry and free from dust, foreign matter and other contaminants prior to the application of the ULVABond contact adhesive to both mating surfaces of the 50mm overlapping joint(s). Use a fine tip marker pen line to register correct alignment. 6.5 Where required, ULVAShield can be fully or partially adhered to substrates. 6.6 ULVASeal should then be applied to all exposed edges of any fittings, joints and penetrations, after solvent wiping the joint area prior to application. Page 7

8 ULVAShield non-metallic cladding installation procedures 7.0 ULVABond 7.1 Using an ULVA applicator gun, apply a thin uniform film of ULVABond contact adhesive to both mating surfaces of the overlapping joint(s) using the previously applied fine tipped marker pen line as a guide (fig 6). Dependent upon ambient conditions, allow between 2 minutes and 8 minutes typically for the adhesive to become touch dry before bringing the mating surfaces together. ULVABond can be applied in temperatures from 5 Centigrade. For applications outside of these parameters refer to ULVA s Technical Department. Ensure that ULVABond is applied in an area with adequate ventilation. Spillage and excessive ULVABond can be removed using locally sourced solvent. General purpose solvents such as Toluene or Xylene are recommended. Applicator guns can be cleaned using the same recommended solvents. The brush can be unscrewed from the nozzle and soaked in solvent also. Ensure the plastic brush shroud is in place when not in use. The use of ULVABond is mandatory no substitute adhesive is allowed. 7.2 Following application and touch drying of the ULVABond adhesive, and ensuring the ULVAShield is aligned with the previously applied fine tipped marker pen, bring the mating surfaces together (fig 7). When contact is made, even, firm pressure should be applied to ensure a good tight bond is achieved. 6 Apply ULVABond to both mating surfaces The same procedure should be adopted for each consecutive ULVAShield wrap allowing for a circumferential joint as well as the longitudinal joint with 50mm overlaps. 7.4 In low temperature or where airborne pollutants might be experienced, wipe the overlap area with locally sourced solvent, such as Toluene or Xylene, prior to ULVABond application to aid initial bonding. Applicator gun Once touch dry bring both surfaces together using alignment guideline. Page 8

9 8.0 ULVAForm 8.1 ULVAForm shall be used for bends, elbows, tee joints and endcaps. ULVAForm is generally supplied as half shells and is applied using the same procedure as ULVAShield membrane. ULVAForm accommodates any insulation thickness tolerance with its variable overlap. Installation of ULVAForm fittings should follow best practice with regards to watershed. 8.2 Offer the 2 half shells to the insulated area for a dry fit. Once alignment is achieved, make fine tip marker pen marks to ensure subsequent alignment when the adhesive is applied and to show the overlap area for bonding. Apply ULVABond to all mating surfaces and when touch dry bring the two halves together. It is recommended to fit the half shells one at a time, fit the first half shell considering water shedding, ensuring it is in line with the fine tip marker pen datum marks, then fit the other half shell. 8.3 Z Endcaps are supplied with a collar to facilitate a positive bond around the pipe. Apply as a dry fit and mark up with fine tip market pen, apply the ULVABond to all mating surfaces including steel pipe work. When touch dry, fit the half shells one at a time. For heat traced lines Z Endcaps with a recessed channel shall be used with a bead of ULVASeal placed in the channel prior to embedding the cable to ensure a water tight seal. Where trace heating systems exceed 100 Centrigrade, please refer to the high temperature termination detail. 8.4 ULVASeal should then be applied to all exposed edges of any fittings, joints and penetrations, after solvent wiping the joint area prior to application. Page 9

10 ULVAShield non-metallic cladding installation procedures ULVAForm - Elbow 8 10 Ensure good insulation fit. Apply ULVABond to both mating faces Mark datum points with fine tip marker pen. Bring both surfaces together using even pressure. Page 10

11 ULVAForm - Tee-Piece Ensure good insulation fit. Apply ULVABond to both mating faces Align fittings in dry fit using a fine tip marker pen to mark position. Bring both surfaces together using even pressure. Page 11

12 ULVAShield non-metallic cladding installation procedures ULVAForm - Bend Ensure good insulation fit. Apply ULVABond to both mating faces Align fittings in dry fit using a fine tip marker pen to mark position. Bring both surfaces together using even pressure. Page 12

13 ULVAForm - Z End Caps Application of ULVABond after dry fit. 21 Ensure bead of ULVASeal placed in channel prior to embedding heat trace cable. 23 Pipe wall Bring both surfaces together using even pressure. ULVASeal End Cap ULVABond Insulation Page 13 Bring both surfaces together using even pressure.

14 ULVAShield non-metallic cladding installation procedures 9.0 ULVASeal 9.1 Once the joints are made, ULVASeal sealant shall be applied to the outer edge of the joint as a sealing caulk. To guarantee good surface adhesion between ULVASeal & ULVAShield, solvent wipe the area prior to application of ULVASeal which also ensures the outer surface of the joints are clean, dry, and free from contamination use locally sourced Toluene or Xylene solvent. ULVASeal is applied using a gun fed by alubag sausages. The bead thickness guideline should be between 8mm and 10mm and 3mm high, with the edge of the overlap in the centre of the bead to ensure a complete watertight seal is achieved (see figure 24). The ULVASeal Nozzle assists the applicator to deliver the correct profile and positioning of the sealant bead directly from the applicator gun. Additionally, where required, the ULVASeal applicator card can be used to assist in achieving a uniform sealant bead profile. The ULVASeal is applied to all circumferential and longitudinal joints, terminations and penetrations. Only ULVASeal may be used with no substitute products, alternative products will nullify ULVA s warranty. 9.2 The purpose of ULVASeal is to act as a sealant and not as a structural adhesive. On bare metal surfaces, a test should be conducted to ensure adequate bond strength otherwise a primer coat will be necessary to promote bond adhesion (Seek advice from ULVA Tech Dept.). On pre-painted surfaces, ensure the coating is sound, clean and dry to accept the sealant. Primers for ULVASeal are available to enhance bond strength to certain coatings, for example the silicone sealing typically applied over some TSA coatings. (Seek advice from ULVA Tech Dept). The applicator must satisfy themselves of good adhesion to substrates Page 14

15 9.3 ULVASeal Self Amalgamating Tape Where the use of ULVASeal is inappropriate, such as on a substrate which offers poor adhesion properties, ULVASeal Self Amalgamating Tape shall be used. The tape is wound, under tension where the tape is stretched to approximately twice its original length with at least 3 wraps to create a homogenous fused waterproof termination. 29 Note: ULVASeal Self Amalgamating Tape shown in red colour for clarity. Standard colour is grey. 28 Minimum 25mm Minimum 25mm Page 15

16 ULVAShield non-metallic cladding installation procedures Page 16

17 10.0 Composite sections 10.1 ULVAShield is also available factory bonded to a number of insulation mediums. This composite system has the longitudinal selvedge joint incorporated. The section is simply offered up to the pipe (as normal insulation), the ULVABond applied to the jointing surfaces, and when dry, brought together in the same manner as conventional ULVAShield cladding. Where practical, this is the preferred system as it reduces time and workload at site ULVA Composite sections require jointing strip application at the circumferential butt joint of each section. The 100mm wide jointing strip of ULVAShield is cut to length (circumference plus 50mm), aligned dry over the joint to give a 50mm overlap to each adjacent pipe section, marked with fine tip marker pen. ULVABond is subsequently applied as per standard application methods followed by ULVASeal. Page 17

18 ULVAShield non-metallic cladding installation procedures 11.0 Penetrations Penetrations such as End Caps, nozzles, pipe supports, anti-vibration supports and heat tracing are most prone to water ingress. Areas prone to mechanical loading such as foot traffic puts stress on the termination interface between ULVAShield and penetration, therefore the interface should always have a mechanical bond and not be reliant on a simple bead of sealant. Where practicable such as lifting lugs these types of penetrations should be completely encapsulated to achieve weather proofing integrity. Where the use of ULVASeal is inappropriate, such as on a substrate which offers poor adhesion properties, ULVA Self Amalgamating Tape shall be used. The tape is wound, under tension with at least 3 wraps to create a homogeneous fused waterproof termination (see figures 28 & 29) End-caps These end-caps have an additional collar designed to be adhered around the pipe/penetration and can also be supplied with a pre-moulded channel to accommodate trace heating cable where required (see figure 22). For heat traced lines Z Endcaps with a recessed channel shall be used with a bead of ULVASeal placed in the channel prior to embedding the cable to ensure a water tight seal. 32 Page 18

19 11.2 Collar fittings Where a pipe/protrusion/nozzle penetrates, the pre-moulded top-hat fitting is adhered to the ULVAShield and the pipe/protrusion penetration and secured using ULVABond & ULVASeal (See fig 35) First of two half collars shown in position Apply a band of ULVABond around pipe/protrusion Dry fit and mark ULVASeal Secure collar to pipe/protrusion. Page 19

20 ULVAShield non-metallic cladding installation procedures 37 Pipewall ULVASeal Collar ULVABond Insulation Page 20

21 12.0 Field Fabrication Where the standard range of ULVAForm fittings are unavailable, Field Fabrication is permissible. ULVAFlashing is available for this purpose. The flashing strip is 1mm thick and 150mm wide and should be jointed conventionally with a 50mm overlap. Page 21

22 ULVAShield non-metallic cladding installation procedures 13.0 Drain plugs On hot service pipes and vessels, it is recommended to fit drain plugs to future proof the system, allowing for the egress of water which may enter the system as a result of incomplete maintenance or mechanical damage. Typically drain plugs are fitted every 3m, at low points and insulation stops (see fig 38). 38 The drain points also eliminate the potential for very hot water and/or steam vapour being generated within the insulation zone. Drain plug method. Page 22

23 14.0 Underdeck insulation fastening Underdeck insulation to flat areas such as walls, bulkheads etc. are typically secured using insulation pins. The ULVAShield membrane should where possible be adhered to the insulation panels and stainless steel domed caps applied to the pins with a bead of ULVASeal applied around the exposed pin to act as a gasket between ULVAShield and the domed cap (see fig 41) 40 ULVAShield Bulkhead ULVASeal gasket Insulation pin Stainless steel dome cap Page 23

24 ULVAShield non-metallic cladding installation procedures 15.0 Direct Contact Temperatures 15.1 Hot Service Temperatures In order to maintain system longevity, ULVAShield and ULVAForm shall not come into direct contact with hot surfaces in excess of 100 C (212 F). For process temperatures in excess of 100 C, the following high temperature termination details will apply. If ULVAShield is to be placed in direct contact with surfaces in excess of 100 C, ULVA s hot termination detail should be employed which utilises a thermal break at the interface comprising of a 5mm Pyrogel gasket. The below chart shows the End Cap interface temperature High temperature penetration detail up to 250 C 43 ULVAShield Insulation ULVASeal ULVABond ULVAForm end cap 42 Pipe Temperature C Maximum Endcap interface temp with 5mm Pyrogel C ULVASeal Pipe 20mm 5mm Pyrogel Thermal Break 30mm Page 24

25 15.3 High temperature penetration detail for use between 250 C to 300 C High temperature penetration termination for service temperatures up to 300 C. Detail incorporates a 5mm Pyrogel thermal break. High temperature sealant AS1805 must be used. Ensure the collar of the stainless steel End Cap is 5mm longer than the width of the thermal break tape to ensure correct high temperature sealant application High Temperature Terminations To act as a thermal break between ULVAShield and high temperature terminations a stainless steel plate with underlying glass cloth or Pyrogel is utilised to reduce the temperature at the ULVAShield interface to below 100 C (212 F). 44 ULVAShield Insulation ULVABond Stainless steel end cap High temperature sealant (AS1805) 1st Stage glass cloth thermal break 2nd Stage stainless steel plate bonded to substrate prior to application of ULVASeal Pipe 20mm 5mm Pyrogel Thermal Break 30mm Typical high temperature endcap termination Page 25

26 ULVAShield non-metallic cladding installation procedures 15.5 Terminations within Rigid and Flexible Enclosures Where insulated pipework terminates within an enclosure (removable jacket or rigid box) ensure endcap terminations are utilised. Where rigid metal boxes are utilised, ensure stainless steel landing collars are applied (see drawing 45). If temperatures generated through conduction of a metal fabricated enclosure sitting on the stainless steel landing collars is greater than 100 C (212 F), the landing collar should have a glass cloth or Pyrogel underlay. Where service temperatures within enclosures exceeds 100 C (212 F) refer to ULVA s Tech Dept for advice. Where there is a risk of additional reflected radiant heat from a flange, the distance from the flange to the ULVAForm endcap should be sufficient so as to ensure the ULVAForm endcap does not exceed 100 C (212 F). 45 Stainless steel landing collar Optional glass cloth or Pyrogel underlay Page 26

27 15.6 High Temperature Termination to Other Penetrations Where practicable such as lifting lugs these types of penetrations should be completely encapsulated to achieve weather proofing integrity. See figure Page 27

28 ULVAShield non-metallic cladding installation procedures 15.7 Cold Service Temperatures Depending upon cold service temperatures and design requirements, there may be a need to introduce project specific termination and contraction joint details consult ULVA s technical department for details. Typical pipe support detail showing cold termination shown in Fig HD-PR Segments (Glued Together Or Monolitic) Vapour Barrier Foil Support Sheet + Rubber Pad Vapour Stop Adhesive 50 Structural Cradle ULVASeal 50 ULVABond ULVAShield Adhesive Vapour Stop Vapour Stop Cryogenic Adhesive All dimensions are in mm Page 28

29 15.8 Cold Service Termination of insulatation It is important to ensure continuity of vapour barrier at insulation terminations. Typically, after the insulation, secondary & primary vapour barriers are applied in accordance with the project specification, a mastic vapour barrier should be applied such as Foster in accordance with the manufacturer s procedure (see typical detail in fig 51). Ensure the mastic vapour barrier is dry before applying the ULVAShield final cladding section bonded to the mastic barrier. Depending on the nature of the termination i.e. temporary or permanent, an endcap can be applied as depicted in fig 52. ULVAShield Insulation Vapour barrier Mastic Layers Primary vapour barrier ULVAShield End Cap Page 29

30 ULVAShield non-metallic cladding installation procedures 15.9 Movement of joints Due of the elastomeric properties of ULVAShield, in normal service, no provision is required for expansion/contraction. If it is determined that a contraction joint is required a typical detail is shown in Fig Primary vapour barrier ULVAShield ULVASeal Premoulded ULVAShield Mineral wool ULVASeal self ULVASeal Bellows Cap bonded to compression filler amalgamating ULVAShield tape ULVAShield Primary vapour barrier Insulation Page 30

31 16.0 Insulation of vessels, tanks and machinery 16.1 Binding wire shall not be used on final layers of insulation in case of potential damage to ULVAShield membrane. Stainless steel banding with deburred edges must have a sacrificial rubbing strip of ULVAShield applied over the buckle to mitigate the potential to abrade against the ULVAShield cladding membrane The ULVAShield cladding shall be applied in accordance with standard installation procedures, ensuring close contact at all joints with no uneven levels at joint details. Where complex shapes require cladding such as domes, spheres etc, the elastomeric ULVAShield cladding can be formed using traditional insulation cladding techniques Where segments are cut to accommodate spheres, vessel domes etc, especially with small diameters, it may be necessary to reduce the overlap at points to accommodate the surface profile. In these instances it is permissible to reduce the overlap to a minimum of 20mm. Develop shape using conventional segment techniques. Page 31

32 ULVAShield non-metallic cladding installation procedures Finish with ULVASeal Apply segments using standard procedures with ULVABond adhesive to overlaps. Page 32

33 57 58 d e f a b a Vessel/Tank insulation b 100mm Bands of ULVAShield joint strip strapped onto the underlying insulation at intervals on 950mm or at every joint/seam - ULVAShield band should be adhered to itself with an overlap of 100mm then secured in place using 3/4 stainless steel banding in order to provide support c c 1 Metre high rings of ULVAShield applied to the vessel insulation and adhered and secured to the 100mm ULVAShield joint strips at both top and bottom seams with 50mm overlap d A 100mm square shall be adhered over the banding buckle to ensure that the buckle does not create any abrasions to the outer layer of ULVAShield. e 3/4 Stainless steel banding secured with a banding buckle f 100mm wide ULVAShield joint strip Page 33

34 ULVAShield non-metallic cladding installation procedures 59 Centre Patch allows the straps to be glued from this point to the base strip below The band at the base is glued at the overlaps, and to the underlaying insulatation (if possible) With 4 Straps minimum, the DOME END segments will be glued to the straps from the base straps to the centre cap Dome segments can then be laid on the head as per the image, glued at the centre cap and at the base strap Page 34

35 1,000mm Incorrect installation. Correct installation. Further details Page 35

36 ULVAShield non-metallic cladding installation procedures 17.0 Repair/inspection of insulation system 17.1 Area to be repaired and/or inspected should be clearly marked with a marking fine tip marker pen ULVAShield should be cut with suitable scissors ULVAShield and the insulation shall be removed to access the pipe work Any damaged insulation should be replaced The surrounding area of ULVAShield shall be cleaned with detergents and locally sourced Toluene or Xylene to greater than 100mm from the edges of the repair region taking care not to wet the insulation Patch the repair adding 100mm x 100mm to the size of the required repair patch. Apply the patch using the same procedures as for the sheet cladding. For larger areas, simply overcap with ULVAShield from the roll ensuring minimum 50mm overlap is achieved ULVABond shall be applied to patch and ULVAShield cladding, then bonded together. Finally ULVASeal shall be applied to all joints. Ensure area surrounding damage is clean and dry etc. Page 36

37 63 65 Mark-out area for patch repair. 64 Apply patch, with radial corners, and finish with ULVASeal. Apply ULVABond to both surfaces. Page 37

38 ULVAShield non-metallic cladding installation procedures 18.0 Inspection Ports Visual Inspection Ports (VIPs) are available in a range of sizes to aide client inspection. Page 38

39 19.0 Flange Enclosures up to 100 C (212 F) 19.1 Weatherproofing of insulated flanges may be achieved by encapsulation with ULVAShield Before enclosing the pipe flange/pipe support, ensure that ULVAShield installed to adjacent pipework is correctly terminated with suitable end caps and sealed with ULVASeal (fig 66) Apply oversized insulation section to the flange/pipe support (fig 67) and encapsulate with ULVAShield using standard techniques, or apply ULVA Composite section with factory applied ULVAShield membrane Finally, fit correct sized end caps and seal with ULVASeal to the adjacent clad pipework. Encapsulated system with drain hole Page 39

40 ULVAShield non-metallic cladding installation procedures Cold Insulation Flange Enclosures 20.1 Weatherproofing of insulated flanges may be achieved by encapsulation with ULVAShield. 71 Primary vapour barrier Loose wool Insulation material ULVAShield Endcap ULVAShield Pipe 70 Secondary vapour barrier Vapour stop Adhesive/Sealer Page 40

41 21.0 Pipe Clamp Covers Where the pipe clamp lugs protrude past the thickness of insulation, ULVAForm pipe clamp covers shall be used (see 75) which are available in a range of sizes. DO NOT attempt to simply apply ULVASeal around the lugs as a termination detail. 73 The correct sized pipe clamp covers should have sufficient depth to ensure the lugs do not come into contact with the ULVAForm cover ensure a 20mm clearance between lugs and cover (see 73) so that loose filled insulation can be packed around the lugs to provide shape to the moulded cover. Typical pipe support 72 Typical pipe support Clamp lugs protruding Page 41

42 ULVAShield non-metallic cladding installation procedures Adhere cover with ULVABond. 75 Ensure cover is packed with insulation to provide integrity to the moulded component. Finish with ULVASeal. Page 42

43 22.0 Valve Enclosures 22.1 To encapsulate a valve assembly with ULVAShield, first fit insulation to the valve and then encapsulate with ULVAShield using standard techniques finishing with suitable end caps and ULVASeal termination details. Care should be taken to ensure the ULVASeal does not come into contact with valve spindles or other moving parts etc when terminating the ULVAShield. Page 43

44 ULVA INSULATION SYSTEMS LTD Hortonwood 31, Hortonwood Industrial Estate, Telford, Shropshire, TF1 7GS UK TEL +44 (0) FAX +44 (0) WEB Page 44