Document M4DDXpZR0avdYNerDBXnYr2gj

FILE NAME: Reynolds Metals (RM) DATE: 1965 Sept 10 DOC#: RM002 DOCUMENT DESCRIPTION: RM Recommended Practices - Application of Sprayed Limpet Insulation REYNOLDS METALS COMPANY^- SHEEWIN PLANT y% worjfagggcjj 3 ~- AkuJ APPLICATXON OF OATE E V IS IO N p A 7 C H I I J G E X I S T I N Q -7-6. ______BI SA_ SI SPRAYED LIMPET IBS u^ i O B D A TE I R E V ISIO N CLEANUP & MATERIAL - -..^.4 . Paga ] o f S ? SAFETY SCOPE This specification covers" the procedure for the installation of sprayed "Limpet" asbestos thermal insulation. GENERAL SURFACE PREPARATION Clean loose scale, dirt and grease from the surface, using wire brush or sand blast. It is not necessary to buff bach to bright metal, only loose scale, particles and dirt need to be removed. Limpet should not be . , applied over an asphalt primer. It should not be applied When' < atmospheric temperature is below 40F. There are two types of Limpet? 1W-25 is for temperatures to 700F, ffl-8 is for temperatures to 1350F. '.V. The insulation should, if necessary, be protected by x a #r" of tarpaulins until the weatherproof coat has been applied. -: The sprayed Limpet must dry at least 24 hours before application of weatherproof coat-- longer if temperature is below 70'F a n d relative humidity above 60%. PERSONNEL PROTECTION Spray "Limpet" asbestos to a thickness of 1--1/2" on surfaces of vessels, tanks, equipment, pipe or duct within three feet of certain designated working areas, covering -all portions within each of personnel. TANKS Tanks, including deaerator and blowdown tanks in boiler ' plant, with exception of strong caustic .(such as digester vessels} or strong sodium alumnate tanks, are to have Graham pins stud welded_on 18" centers, in a diamond pattern on all ^surfaces. Spray the Limpet to a thickness 1/4" less than required by Table I. Impale 4" x 4 " squares of *lath on pins, snug up to insulation, install speed clips, and cut excess pin. Spray additional 1/2" of insulation, tamp down to required thickness. For strong caustic tanks and strong sodium aluainate tanks (strong liquor, caustic storage, etc.) attach the pins with epoxy adhesive Bakerloc (Baker Tool Co., Houston, Texas). FINISH Trowel one coat #551, Gray Vi-Ac breather mastic. Place 10 x 10 mesh glass fabric reinforcing while mastic is soft. Trowel second coat of Vi-Acj The minidum dry film thickness of the two coats of Vi-Ac -weatherproofing material is 1/8" , * - A ll la t h to be s t a in le s s s t e e l . l PLAINTIFFS * EXHIBIT RMC-38 B r . 0011-3 SX-2TS3 .... GSMelton 7-15-65 Work Specification WS-LQ-80 Re APPLICATION OF SPRAYED LIMPET INSULATION Page 2 of 5 FINISH {Cont_} The weatherproofing should extend 3" boyond the insulation on bracing, supports, pipe, etc., attached to the tank* The lower edge of the weatherproofing should not )_>e bonded to the tank. As an alternate to the Graham pins, stainless steel flat head #10-24 machine screws and stainless steel -nuts may be used. Arc-weld the heads to tank, and upset threads to prevent nuts from backing off. PRESSURE VESSELS Vessel heads and bases require Graham pins or screws for anchoring insulation? follow the insulation procedure as out lined above^ for tanks. Graham pins are installed during manu facture, prior to stress relieving. Vessel walls do not require anchors. Spray the Limpet to 1/4 - 1/2" thicker than in Table I, and tamp to the specified thickness. # Apply finish as outlined for tanks. All vessels should have welded circumferential support rings at maximum 9 l spacing installed during manufacture, prior to stress relieving. EQUIPMENT As called for on equipment list, pumps, turbines and other machinery are to he spray insulated with Limpet L5i-25,, Mask moving parts so that insulation is not sprayed onto or in a manner to interfere with moving parts. Thickness required shall be as specified in Table II. For outdoor service finish against weather with 1/8H (Dry film) Vi-Ac breather mastic reinforced with 10 x 10 glass cloth. The edges of the Limpet should be tamped hard and sloped 45 to shed rain. Vi-Ac and glass cloth should extend at least 3" beyond insulation. Duct and flues (boiler, exhaust, inlet, etc.) are to be spray insulated with Limpet IAtf-25 for services to 700F and Limpet LB-8 for service from 701F to 1350nP. Grahau pins are to be stud welded on IB*1 centers in diamond pattern on all vertical and bottom surfaces. Spray insulation as for tanks, except refer to Table II for required thickness. Stainless steel #10-24 machine screws may be used instead of Graham pins. B.001137 GSMelton 7-15-65 Work Specif ication 'Z-tfiS WS-LQ-80 " Rev APPLICATION OF SPRAYED LIMPET INSOLATION Page 3 of 5 EQUIPMENT (Cont.) For outdoor service finish as for pumps and turbives. Where duct or flue extends indoors, carry the weatherproof finish indoors a minimum of three feet. Spray insulate to a minimum thickness of l", all stiffeners and supports running along ducts or flues, rounding and filleting to form a continuous smooth surface with base insulation Except for gas turbine expansion joints,' all expansion joints or flues and ducts are to be shielded with a metal sleeve. Insulate all sleeves with the same material and thickness as on adjoining duct. Sleeves are anchored to one side of expansion joint and free to slide on the others. Gas turbine expansion joint is to be insulated with a removable type of material, i.e. mineral wool blanket strip, the thickness to be the same as for the adjoining piece. Cover bolts with aluminum foil before covering with Limpet. Stop insulation short of casing flanges to allow removal of bolts, finish off to 45 bevel, and seal. Do not cover nameplates - bevel 45 to edge of nameplate and seal. fo, PATCHING EXISTING BLOCK INSULATION Preparation: Remove all loose covering mastic and wire mesh in the area to be patched. Remove all damaged blocks and prepare the surface in the usual manner, installing Graham pins if necessary. If strapping is used to hold some remaining blocks in place^ cut and lay it back. The waterproof cover should be stripped back to at least 6n beyond the limit of the damaged block however the cover generally will be damaged for a somewhat larger area. Installation: Spray on the "Limpet" in the usual manner, feathering the edge out over the old block but not on the mastic waterproofing. When it has been tamped to finish thickness reconnect, by splicing in a new section, any bands holding remaining block. Use the banding tool and stainless steel "Band-It" straps avail able from the toolroom. Clean and rough up the old mastic with a wire brush for 16" around the patch area. Spread the Vi-Ac mastic over the "Limpet", the block, and the roughened original cover. Apply the glass cloth and the finish coat. The decision to spray ''Limpet" or replace blocks on a patch job will depend on its location and accessibility. As a general rule, a readily accessible job should be at least 45 square feet in area. This will require one sack of "Limpet" applied to a depth of 1 1/2". B. 001138 GSMelton 7-15-65 W ork s p e c i f i c a t i o n ' v? WS-LQ-80 Rev! APPLICATION OF SPRAYED LIMPET INSOLATION Page it o f i TABLE I - VESSEL AND TANK INSULATION, CODE H Vessel or Tank Surface Temperature Thickness up to 300 P 1-1/2 inch 301 to 450 F 2 451 to 600 F 3 TABLE II - EQUIPMENT & DUCT INSULATION, CODE H Machine Surface Temperature Thickness 150 to 175F 175 to 325F 326 to 550 F 551 to 750F 751 to 950 P 1 inch 1-1/2 .2 2-1/2 3 clea n u p Remove all excess Limpet oversprayed onto moving mechanical parts, bolt threads, name plates, ladders, landings and pads each day before the cement sets up hard. At the com pletion of the job, or as may be necessary, remove all sacks, wrappers, cartons, and other large debris from the work area. EMPLOYEE SAFETY All employees working with Limpet blown asbestos are required to wear respirators. This includes the man feeding the machine, the Limpet tamper, the nozzle operator and any other service repairman in danger of breathing airborne asbestos fiber. B.001139 *Y-------------------------OATE, TCHKD. by_______DATE------------ _J&:C/ ^ACA72 2/Y__ ZL1' SUBJECT--4-- j 77-------------------------------j __________________ "UKA SPECIFICATION SHEETNQ--lA l or ' 5? _______ 7 / I S / 6 5 ____ L/M PET S p R f Y E D --- Asqestos {//-Ac Ma s t i c G ra h a m P/n -- A l t e r /v a t e - starveess v STEEL MACHfIVE SCREW /Vi/7" // y K X/1 /0 X /> -/S*Clot- -SPEED CUP 4*x 4* L a t h - 5tAhuz: Sr'i- T^A'/r INSULATION DETAILS B.001140