Norsok r-004 pdf

Technical specifications and HSE data sheets shall be in Norwegian. Types of non-metallic weather proofing shall be subject to Company approval. When the adhesive cures it shall constitute a flexible bond that absorbs mechanical and thermal stress.

Bonding adhesive shall not be used above OC. When dry, the cement shall form a hard surface protection against abrasion. Anti-abrasive coating shall be used to prevent damage to cellular glass and painting due to vibration where applicable. The low temperature anti-abrasive coating shall be a one component urethane based coating.

The anti-abrasive coating shall be suitable for application at service temperatures. If heat tracing is used to any type of stainless steel piping, then aluminium foil with polyester on one side shall be used.

The polyester coated side to be applied towards the pipe to prevent galvanic corrosion. Dimension of outer jacket shall be in accordance with EN Casing pipe dimensions. The insulation system must withstand minimum 0,3 MPa pressure to the outer surface. It must be designed for clamping on the outer jacket or water tight insulation of supports. Field insulation of field joints and other accessories shall give same insulation and weather protection as for straight pipes.

The insulation system shall fulfil class 1 in accordance with NT Fire For pipe systems with heat tracing a groove duct shall be formed in the insulation tight to the main pipe. Surfaces to be insulated shall be clean and dry. The application of the insulation shall not be started before the mechanical completion certificate for coating has been issued. Discontinued insulation work shall be properly covered to avoid damage and ingress of water to the insulation clean and dry.

Single layer insulation shall be applied with longitudinal joints staggered. In double-layer applications, joints of the outer layer shall be staggered with respect to the inner layer joints. All insulation shall be installed with all joints tightly glued together. Voids within the insulation are not acceptable. If insulation work precedes testing of pipe work, welds and joints shall be left uninsulated to allow inspection during testing.

Insulation on valves shall leave the packing gland accessible. To secure cellular glass pre-formed sections in place, adhesive glass fibre reinforced tape or stainless steel banding shall be used.

Wire shall not be used. Insulation and jacket must follow the thermal movement of the service pipe. All welding must be controlled, pressure tested, documented, approved and surface treated before the final insulation is performed. Metallic jacketing for vessel insulation shall be edge crimped and overlapped 75 mm on longitudinal and circumferential seams.

Head covers on vessels shall overlap shell covers by mm. On vessel jackets, breather springs shall be used on bands if required for expansion. Minimum 4 clips per seam. Metallic jacketing shall be fastened with stainless steel bands. Only for difficult details such as bends, T-pieces etc.

Metallic jacketing for pipes and fittings shall be roller formed and edge crimped at longitudinal seams. Circumferential seams shall be crimped 50 mm from the edge wherever possible.

Circumferential seams shall be overlapped minimum 50 mm. Longitudinal seams for outside diameters up to mm shall be overlapped 30 mm and 50 mm above. If a specific temperature has to be maintained, the thickness of the insulation material in question has to be specified in each case. The following equipment shall not be insulated for heat conservation class 1 except for steam services or when otherwise specified: 1.

Vessel man way covers, nozzles and flanges. Exchanger nozzles and flanges. Valves and piping flanges. Control valves, line valves and fittings, which are to be removed periodically. Expansion and rotation joints, slide valves and similar equipment. Steam traps. Flanges operating at temperatures above OC shall be insulated and protected with sheet metal jacketing. Insulation for vessel heads shall be curved blocks or standard flat blocks cut to fit. For single layer and outer layer of multi layer insulation, banding shall be placed approximately 30 mm on each side of all butt joints with intermediate bands at a maximum of mm centres.

The inside layer of multi layer installations shall be banded at a maximum mm centres. The last piece of insulation in each layer shall have a snug fit to make all joints tight. Contraction joints are not required for resilient insulation materials. The meeting edges of blankets shall be tied together with stainless tie wire. Insulation pipe sections shall be tightly butted together and secured to pipe with stainless steel bands.

Insulation shall be secured with bands over the outer layer at each side of radial joints and at the centre of each section. Spacing of bands for the inner layer of multi layer insulation need only be sufficient to hold sections in place until the outer layer is secured. To cover elbows and other irregular surfaces, sections may be cut and fitted in the field.

Insulation joints shall be butted firmly together and secured with stainless steel wire or bands. Fittings and flanges shall be insulated with blankets. Insulation shall be secured by wire or band. The concept shall give a compact construction. Thickness in millimetres for cellular glass. DN Maximum operating temperatures oC mm 20 30 30 30 30 50 50 50 50 25 30 30 50 50 50 50 50 50 32 30 30 50 50 50 50 50 50 50 30 30 50 50 50 50 80 80 65 30 30 50 50 50 80 80 80 80 30 50 50 50 50 80 80 80 50 50 50 50 50 80 80 50 50 50 50 80 80 80 50 50 50 50 80 80 80 50 50 50 50 80 80 50 50 50 50 80 80 50 50 50 50 80 80 50 50 50 50 80 80 50 50 50 50 80 80 50 50 50 50 80 80 50 50 50 50 80 80 Above and 50 50 80 80 flat surface The material thickness given above is guidelines only.

They shall be adjusted up to the closest standard thickness given by the manufacturer. Thickness of 80 mm and above can be built up in two layers if required. For other materials or pre insulation the guidelines above may be used to the nearest standard thickness. In such cases mineral wool may be used if accepted by Company. Weather protection shall be stainless steel jacketing. If the material strength of equipment will be reduced by being subjected to a fire, this must be taken into account in the evaluations, of regulations relating to explosions and protection of installations in the petroleum activities.

With regard to evaluations of depressurising time, a recognised standard such as API RP may be used. If passive fire protection is used, the material strength can be retained for a longer period of time and thereby affect the depressurising time. Required insulation thickness, and combination of insulating materials, shall be calculated on an individual basis, and the following shall be taken into consideration: 1.

Extrapolations of test results are not acceptable. New systems or combination of materials shall be subject to relevant fire tests prior to acceptance. Type of fire. Properties of pipe work and vessel material 4. Content of pipe work and vessel 5.

Depressurisation time for the exposed system 6. Properties of the insulating material 7. Only metallic weather proofing shall be used on Class 5, accept on valves and flanges where removable jackets may be used. A weather proofing membrane can be installed under the metallic cladding to reduce the risk of water ingress and corrosion under insulation. Within the same installation one should try to limit the number of pipe insulation systems by choosing alternatives that provides combinations of sufficient personnel protection, heat insulation, cold medium conservation, fire protection and noise insulation when and as required.

Valves and flanges shall be insulated when specified. Guidelines for the choice of various layers of pipe insulation materials is given in Annex 1: All systems shall be tested according to approved methods, ref. Annex 2. All materials shall also be tested and approved in the actual combination. To correct for uncertainties in materials, workmanship and measurements 3 dB shall be subtracted from the measured values.

The following applies to the materials: 1. Cellular glass as inner layer shall always be used for corrosion protection. All thickness specified in the tables are a guide to minimum dimensions. Covers shall be secured to the shell insulation and sealed to provide vapour tight joints. Sections shall be cut from standard blocks, fitted and wired in place.

Alternatively, tailor made jackets may be used. Flanges shall be insulated with the same insulation thickness as the thickness on adjoining pipe run, vessel, machinery or fitting. A smooth outer insulation surface must be obtained to provide an effective vapour seal.

Fire protection Class 5 The purpose is to reduce the heat input and secure that the temperature on piping, vessels and equipment is below the specified critical temperature when exposed to the specified fire scenario for the actual area of installation.

If no fire scenario or critical temperature is specified, the fire protection shall limit the temperature to C in a hydrocarbon fire situation lasting for 30 min according to ISO all parts. Selected fire protection shall be documented based on relevant fire testing. Acoustic insulation Class 6, class 7 and class 8 Acoustic insulation is specified in order to ensure that noise emission from piping, valves, flanges and equipment meets the area noise requirements for the working environment as given in NORSOK S Based on documented insertion loss, each project may select the applicable class and select materials or combinations of materials to cover the required insertion loss at actual frequencies.

The definition of the classes of acoustic insulation is as given in ISO , Clause 4. The standard specifies the minimum insertion loss for each class related to the diameter of the pipe on which it is to be applied. Class 6 Minimum insertion loss is to be in accordance with the definition given in ISO for class A.

Valves and flanges shall be insulated when and as required by Company. Class 7 Minimum insertion loss is to be in accordance with the definition given in ISO for class B. Flanges to be insulated. Valves to be insulated when and as required by Company. Class 8 Minimum insertion loss is to be in accordance with the definition given in ISO for class C. Valves and flanges shall be insulated. External condensation and icing protection Class 9 The purpose is to prevent outside condensation on piping and equipment with operation temperatures below 20 C.

General requirements for all insulation classes and details are given in this clause. Surface preparation prior to insulation on piping, equipment, vessels, tanks, valves, flanges, pipe penetration, etc. All materials, or combination of materials and thicknesses, for insulation class 5, class 6, class 7 and class 8 shall be subject to relevant testing prior to use, see 7.

The insulation thickness shall be calculated in accordance with NS-EN ISO , and based upon project requirements for heat loss, energy input etc. Qualification procedure is stated in IPS shall be taken into consideration in design phase. Alternative insulation system and materials may be used if the proposed materials and methods satisfy the functional requirements in this NORSOK standard, see Clause Approval by Company is required.

Technical specifications and HSE data sheets for all materials shall be in Norwegian. All insulation shall be covered with weather protection designed and installed to prevent ingress of water during normal operation throughout the project design life.

Insulation adjacent to flanges in piping and equipment shall be terminated to allow removal of bolts without damage to insulation. The termination of the weather protection shall be waterproof. All design shall allow for necessary room for insulation and insulation jackets and preformed boxes. Particular care shall be taken in piping design to ensure sufficiently long straight pipe runs around e. Insulation systems shall be non-toxic and watertight.

When a rigid type of insulation is used, provision shall be made for longitudinal expansion and contraction. Effective drainage shall be ensured on insulation, see 4. Insulation on long vertical pipe runs shall be supported with rings spaced on 3 mm maximum centres installed on the piping.

Width of rings shall be half the thickness of the insulation material. On cold piping, insulation covering on rings shall be minimum 30 mm. The rings shall be fastened to the piping as described in the Insulation Handbook.

Rings shall also be provided around nozzles above DN mm. The rings shall be fastened to the vessel by lugs welded to the vessel, see Insulation Handbook. The vessel supplier shall weld the lugs to the vessel. Block insulation of CG shall be fastened with mechanically tightened metal bands and with bonding adhesive. The bands shall be fixed to the fixing ring installed on the vessel. Vessels of diameter 1 mm and smaller shall be insulated as piping. In the choice to use jackets or boxes close attention is to be paid to such as the geometry of the equipment, weather condition, mechanical impact, high pressure washing, use of chemicals, flare, available space and size.

Jackets and insulation boxes shall have a design that allows frequent removal and reinstallation without taking damage. Insulation boxes for valves and flanges etc. Tailor made jackets shall not be used for class 2, class 3, and class 9. Nor shall tailor made jackets be used for valves and flanges above DN , for systems with operating temperature below 20 C and in weather exposed areas. For valves above DN in all classes except class 2 and class 9, insulation houses with inspection hatches and doors shall be used.

The material shall be suitable for use against design temperatures, and shall have an adequate wear resistance to withstand frequent handling and normal tear and wear. Preformed insulation boxes, which shall be frequently removed for inspection or maintenance purposes, shall be provided with an inspection hatch with toggle latches and gasket between the hatch and the jacketing.

The insulation shall be easily removable under the hatch. Inspection hatches shall be located where required by Company and shall be indicated on the fabrication isometric. For class 5, stainless steel shall be used. Jacketing for flanges and valves shall be formed such that it sheds water.

The materials used shall have documented resistance to deterioration by the applicable media. Mineral wool or AES wool shall be totally wrapped in self-adhesive laminated aluminium foil when used in insulation boxes. No drainage in boxes for class 2 and class 9. The flap fastener type locking mechanism shall be located minimum 10 mm from the outer edge of any overlaps.

For preformed boxes, adjustable ex-center locks shall be used as locking mechanism, minimum size safe working load N. The identification number system shall be easily read prior to and after installation. The vendor shall identify each cover on drawings and store this information as retain documentation. The identification plate shall be made of a material resistant to water and applicable medias. For insulation of instruments, insulated cabinets with hinged doors shall be used.

Instrument tubing DN 10 mm to DN 32 mm shall be insulated with FEF with factory-applied non-metallic weather tight jacketing for temperatures up to C. The non-metallic jacketing shall be in accordance with 5. Tubing sizes above 32 mm shall be insulated as piping. For temperatures between C to C, mineral wool installed on distance holders and metallic or nonmetallic jacketing shall be used. Above C, mineral wool and metallic jacketing can be used.

Surface temperature on heat tracing cables is to be checked prior to deciding material types for insulation of instrument tubing. For fire protection of instrument tubing, see 7. Manufacturer of pre-insulated instrument tubes may be used pending approval by Company.

Longitudinal seams of metal jackets on horizontal or sloping pipelines shall be located maximum 60 degrees away from the lowest point of the circumference. All seams on metallic jacketing shall be provided with a sealant in between the overlap. Jacketing shall, as a general rule, be terminated with a fold and gasket to prevent water ingress and galvanic corrosion. The termination shall be secured with bands. For removable insulation, the terminations shall be secured with toggle latches or band with toggle latches.

Metallic jacketing shall be built with a slope on top of vertical vessels. Removable insulation covers shall be provided for removable vessels heads. Sharp edges are not allowed. The bottom heads of skirt-supported vessels may be covered with flat metallic jacketing. For terminations where there are no risk of water ingress e. Non-metallic weather protection may be used instead of metallic jacketing for all classes except class 5.

The non-metallic weather protection shall fulfil the material requirements in 5. Use of combustible non-metallic jacketing in enclosed areas shall be subject of approval in writing with regard to HSE aspects by Company. Application of non-metallic jacketing shall be done in accordance with vendor's recommendations and relevant part of the Insulation Handbook.

Terminations against piping with a temperature above the maximum design temperature for the non-metallic jacketing shall be metallic jacketing with sufficient length to avoid overheating of the non-metallic jacketing. It is recommended to apply aluminium foil between cellular glasses and non-metallic jacketing.

Heat traced piping, flanges, valves and equipment shall be wrapped with minimum 0, mm aluminium foil prior to insulation to protect the heating cables and improve the heat distribution. Where heating cables penetrate the jacketing, edge protection shall be provided to prevent damage to the cable. A permanent sealer shall be applied in order to prevent ingress of water.

For all insulation systems and insulation classes for piping and equipment except for class 2, class 4, see NOTE, and class 9 there shall be minimum 10 mm diameter drain holes in all low points, and a minimum of one hole every 3 m on horizontal runs. Drain holes shall penetrate the whole insulation system. Necessary precaution shall be taken to avoid damage to the surface protection on the piping and heat tracing cables.

Insulation materials for class 1, class 2, class 3, class 4 and class 9, shall consist of cellular glass up to normal operating temperature C. For class 3, insulation shall only be used where guards are not practical and with normal operating temperatures above C. Materials for class 5, class 6, class 7 and class 8 shall be cellular glass in combination with mineral wool or AES wool. For temperatures above C, mineral wool or cellular glass can be used in accordance with the manufacture specification.

All insulation materials shall have a neutral pH value. No asbestos or asbestos products shall be used. No lead or lead products shall be used unless accepted by Company. Indoor areas with regular water cleaning or testing of seawater deluge system are not considered dry.

For steam and exhaust pipes above C, mineral wool may be used with stainless steel jacketing. In addition to requirements for all applications see prEN, 4. Minimum thickness up to DN 6 in shall be 30 mm. Above DN 6 in the minimum thickness shall be 40 mm. When the adhesive cures it shall constitute a flexible bond that absorbs mechanical and thermal stress. Bonding adhesive shall not be used above normal operating temperature of C surface temperature.

Anti-abrasive coating shall not be used for vessel segments of cellular glass which shall be bonded to vessels. The anti-abrasive coating shall be completely dry before the insulation material is mounted.

The anti-abrasive coating shall be suitable for application at service temperatures. When dry, the coating shall form a hard surface protection against abrasion. Mineral wool shall conform to prEN , with reaction to fire classification A1.

FEF shall conform to prEN Properties specified in Table 7 shall be declared. Table 7 Properties prEN 4. Declared thermal conductivity shall be equal to or better than given in Table 8: Table 8 Flexible elastomeric foam FEF tubes and sheets for cold and hot service Thermal conductivity D 0 10 0, 0, 0, 0, Metallic foils used in connection with heat tracing shall be in accordance with 4.

Metallic foils, when used as vapour barrier shall be a strong, self-adhesive reinforced aluminium foil with total film thickness of minimum 0, mm. An additional layer of 25 mm mineral wool for protection of the vapour barrier shall be applied before installation of the metal jacketing.

Joint sealers and sealing tape shall be permanently flexible through a relevant temperature range and shall be capable of withstanding repeated expansion and contraction. For fire protection the jacketing material shall be stainless steel. Alu-zinc may be used as jacketing material for onshore projects providing Company approval. Stainless steel sheets for pipes and vessels up to DN shall have a minimum thickness of 0,5 mm.

For dimensions above DN the minimum thickness shall be 0,7 mm. Aluminium sheets for pipes and vessels up to DN shall have a minimum thickness of 0,7 mm.

For dimensions above DN , the minimum thickness shall be 1,0 mm. Aluzinc sheets for pipes up to DN shall have a minimum thickness of 0,6 mm. For dimensions above DN the minimum thickness shall be 0,8 mm. Aluzinc sheets for vessels shall have a minimum thickness of 1,0 mm. Types of non-metallic weather jacketing shall be subject to Company approval. Requirements in Table 11, shall be fulfilled for non-metallic jacketing:. This ensures that you are always up-to-date and saves you both time and money.

You need to log in before adding standards to the monitoring service. This service is not available if you are a URL user where you do not log in with an email address. If you need to be able to add standards to the monitoring service, you must register as a user with your own username and password.

A subscription provides an easy online access to standards, and you are guaranteed to always have the latest edition. Email: salg standard. Contact me.