ML20204H251

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Rev 1 to C-NOME-EP-0189, Engineering Procedure for Installation of Mechanical Nozzle Seal Assemblies for Waterford 3
ML20204H251
Person / Time
Site: Waterford Entergy icon.png
Issue date: 03/16/1999
From: Burger J, Mcgarry J, Szabo A
ABB COMBUSTION ENGINEERING NUCLEAR FUEL (FORMERLY
To:
Shared Package
ML20204H122 List:
References
C-NOME-EP-0189, C-NOME-EP-189, NUDOCS 9903290038
Download: ML20204H251 (21)
v • d • e


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! ENGDEERING PROCEDURE FOR THEINSTALLATION OF TiiE MECHANICAL NOZZLE SEAL ASSEMBLIES t

FOR WATEREORD 3 f

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  • RECORD OF REVISIONS NO. DATE PAGES INVOLVED PREPARED BY APPROVED BY 00 3-12-99 All A. Z. Szabo J.M. Burger J.T. McGarry

- 01 Pages 1,2,4,7,11,15,16 A. Z. Szabo J.M. Burger J.T. McGarry i

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C-NOME-EP-0189 Rev. 01 Page 2 of194 l

TABLE OF CONa2NTS Section Title Pm Title Page 1 Record of Revisions 2 Table of Contents 3 1.0 Introduction 4 2.0 Scope 4 3.0 References 4 l 4.0 Equipment 5 5.0 Installation Procedure for Hot Leg RTD MNSA Flat 6 6.0 Installation Pmcedure for Hot Leg PDT MNSA 9 i

  • I 7.0 Installation Procedme for Hot Leg Sampling MNSA 13 LIST OF FIGURES No. Title Pm

'3 Hot Leg RTD MNSA Flat 17 5 Hot Leg PDT MNSA 18 6 Hot Leg Sampling MNSA 19 I .

C-NOME-EP-0189 Rev. 01 Pag 3 ofl_9& l i -

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1.0 INTRODUCTION

E The function of the Mechanical Nozzle Seal Assembly (MNSA) is to provent lealtwr from the instrument nozzle penetrations in a Pressunzer, Reactor Coolant System (RCS) pipe, or Steam Generator due to Prunary Water Stress Corrosion Cracking (PWSCC), and prevent the nozzle from ejecting in the event that the nozzle weld should fail. There are three different configurations of the MNSA

. hardware for installation at Waterford 3:

e Hot Leg RTD MNSA Flat

  • Hot Leg PDT MNSA e Hot Leg Sampling MNSA This procedure will cover the inmallation of the three designs of MNSA hardware only. Modification of the Hot Leg pipe, such a machining, drilling, or tapping operations, is to be provided by others.

The typical crew size for a MNSA installatian, would have two individuals at the workstation for ineallatian activities, with enough backup personnel for adequate support during the entire installation period. QC coverage may involve a third Person.

4 .

2.0 SCOPE This procedure outlines the st:ps necessary for the proper installation of the hardware for the:

  • Hot Leg RTD MNSA Flat on the Hot Leg pipe,
  • Hot Leg PDT MNSA on the Hot Leg pipe, and
  • Hot Leg Sampling MNSA on the Hot Leg pipe.

3.o REFERENCES Unless otherwise noted, latest revisions apply.

3.1 ABBG Dawing No. E-MNSAWFD-223-001, " Hot Leg RTD Machanical NossisSaskAssensly Flat" 3.2 ABB CE Drawing No. E-MNSAWFS228-002, " Hot Leg PDT MNSA."

3.3 ABB CE Drawing No. E-MNSAWFD-22g.003," Hot Leg Sampling MNSA." ,

1 C-NOME-EP-0189 Rev. 01 Page 4 of@ l I

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- 4-0 EQdfPMENT  !

4.1 Hot Lag RTD MNSA hardware Otem 1 Reference 3.1) for Section 5.0.

4.2 Hot Les PDT MNSA hardware Otem 1, Reference 3.2) for Section 6.0, 4.3 Hot Leg Sampling MNSA hardware (Item 1, Reference 3.3) for Section 7.0.

4.4 Calibrated torque wrench, accurate in the 30 ft.-lb. range of operation.

4.5 Calibrated torque wrench, accurate in the 75 in.-lb. range of operation.

4.6 Necuuty torque wrench attachments to adapt to 1/2 inch hex bolt (.75" hex ,

socket or crowsfoot attachment) and 3/8 inch nut (.62" hex socket or crowsfoot attacament).

4.7 Neolube No.2 (or other site approved thread lubricant).

4.8 Open end wrenches as reguld for holding the Hex Nuts for torquing.

4.9 Feeler gauges. (0.005"-0.050" range) i C-NOME-EP 0139 Rev. 01 Page 5 ofHL l

. 5.0 INSTALLATION PROCEDURE FOR HOT LEG RTD MNSA FLAT 5.1 Prerequisites 5.1.1 The RTD and electrical connections are removed to allow installation of the Hot Leg RID MNSA hardware over the nozzle.

5.1.2 The Hot Leg pipe is machined to the reqmrements of deference 3.1. The holes are checked with the appropriate thread gages.

5.1.3 The outer surface of the Hot Leg pipe immediately around the nozzle is free of dirt or rust scale. This surface must be clean for proper MNSA installation.

Notify ABB CENP if condition of Hot Leg pipe is otherwise.

5.1.4 The nozzle is invad in the area where the C e il Seal seats against the nozzle.

Any scoring or gouges are to be dispositioned t, u owner with concurrence by ABB CENP prior to installation.

5.1.5 The Tie Rods Otem 8) and Hex Bolts Otem 11) shall be coated with two coats of Neolube No. 2 (or other site approved thread lubricant). Let the first coat dry before applying the second cost.

5.1.6 The minimum ambient temperature required at the time the bolts are torqued is 1 60*F.

5.2 Procedars Note: All Item Nos. refm.ad in Section 5.0 are from Reference 3.1 and are shownin Figure 1.

5.2.1 Install the Hot Leg MNSA Grafoil Seal halves (Item 7) around the RTD Nozzle and position against the Hot leg pipe.

Note: The 45' cuta in each seal half should mate to create a flat seal. j 5.2.2 Place the two halves of the Seal Retainer (Item 6) around the Grafoil Seal at the .

base ofthe RTD Nozzle. Bring the Lower Flange (Item 5) into position over the .

Seal pmia== Be see the two halves of the Seal Retainer are seated correctly l I

within the Lower Flange I.D. Position the split in the Grafoil Seal at least 20' away from the split in the Seal Retainer. f l

5.2.3 Install the two halves of the Compression Collar Otem 4) around the RTD nozzle, i and place over the Grafoil Seal. Position the split in the Compression Collar approvimmly 90* from de split in the Seal Retainer.

1 C-NOME-EP-0189 Rev.01 Page 6 of,19& l

Note: The Compression Collar is designed f:r ia*=1lation oc a nozzle with a mmimum 3/8" length of straight nozzle below the tapered section (" stick out" distance). Another design feature is that the taper on the I.D. of the Compression Collar is more shallow (Collar has 2.37:1 taper with nozzle i centerline compared with 3:1 for the nozzle). Therefore, this design can be installed on any nozzle with a " stick out" distance of 3/8" or greater.

5.2.4 Bring the Upper Flange (Item 3) in position over the Compression Collar. Be sure

- the two halves of the Compression Collar are seated correctly over the Graf9il Seal and within the Upper Flange I.D.

5.2.5 Align the four Upper and Lower Flange clearance holes for the Hex Head Bolts (Item 11) over the four threaded 1/2"-20UNF-2B holes in the Hot Leg pipe.

Note: Unless already performed in Step 5.1.5, each Hex Bolt shall be coated with two costs of Neolube No. 2 (or other site approved thread lubricant).

Let first coat dry before applying second cost.

5.2.6 Install one 1/2" Retainer Washer (Item 12) on each of the four Hex Head Bolts.

'Iben thread one bolt into each of the threaded holes.

5.2.7 Tighten all four bolts until finger tight.

- 5.2.8 Tighten all four bolts, using a cross pattern, at 1/4 turn increments until the i bottom surface of the Compression Collar makes full contact with the top surface of the Lower Flange (metal-to-metal contact). Ensure that a uniform gap exists between the Upper and Lower Flanges during the bolt tightening sequence. It may be nee ===ry to adjust the turns on a bolt to more or less than 1/4 turn to

.~ maintain an even gap.

Note: When the Compression Collar contacts the Lower Flange metal-to-metal, there may still exist a visible gap of approximately 0.005" km.s outside surfaces of the Upper and Lower Flanges. As long as the Flanges are close tc Mi,(with a gap of approximately 0.005"), the seal is properly sensed and metal-to-metal contact is achieved.

5.2.9 Onesinstal-t Mnetal contact is made, torque all four bolts to 30

  • 2 A.-lbs., using a cross pattern Ifa torque greater than 30
  • 2 A-lbs. is required to create metal-

- to meent consact, psoceed in incr-mt= of 5 A-lbs. until m.! ::Mnetalcontactis achieved. The .. A. .. torque value allowed is 50 A-lb. If there is still no metal-to-metal contact at 50 A-lbs., contact ABB Wm' daar hp=+ig before pr~-Har Once metal-tcMnetal coctact is made, back off each bolt (one at a timme, following the same cross pattern) approximately 1/8 to 1/4 turn. 'Iben,

- retorque to 30

  • 2 A-lbs. Obsenmne rotation of the bok head to ensure it is re-torquod to 30
  • 2 A-lbs. As long me bolts are backed off and retorqued one at a tisse, the springback force in the Grafoil Seal will not be able to overcome the C-NOME-EP-0189 Rev.01 Page 7 ofl_9& l

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preload in the remaining three torqued bolts. Metal-to-metal contact will be maintaineA_

Note: Unless already performed in Step 5.1.5, each Tie Rod shall be coated with two coats of Neolube No. 2 (or other site approved thread lubricant). Let first coat dry before applying second coat.

5.2.10 Place one Hex Nut Otem 9) and one 3/8" Retainer Washer Otem 10) on each end of the four Tie Rods Otem 8). Fully thread (approximately 12 turns) each Tie Rod into each of the 3/8"-16UNC-2B threaded holes in the Upper Flange. Tighten the Hex Nuts to 75 i 5 in lbs. on the bottom end to lock the Tie Rods in this position.

!s%!: 5.2.11 Bring the Top Plate (Item 2) into position over the nozzle and align the clearance DM holes in the Top Plate over the ends of the Tie Rods. Install the Top Plate in e,

contact with the thermowell on the RTD Nozzle.

R 5.2.12 He bottom surface of the Top Plate and the top surface of the RTD Nozzle thermowell must have a .020" i .005" gap at cold conditions. To position the Top Plate with this gap, allow the Top Plate to rest on the thermowell, then rotate each nut 1/3 turn to set the gap. Maintain the Top Plate in this position. Check gap with a feeler gauge.

Note: The pitch for a 3/8"-16UNC thread is 0.062". In other words, for every one rotation, the nut travels 0.062" linearly. Bus, the 0.020" (1/3 turn) is within the appropnate gap range.

5.2.13 Install the remaining four 3/8" Retainer Washers and four Hex Nuts on the ends of the Tie Rods. While maintaining the position of the Hex Nuts below the Top Plate with a wrench, torque the Hex Nuts above the Top Plate to 75 i 5 in.-lbs.

5.2.14 After torquing of all threaded fasteners is complete, bend at least one t;b of all Retainer Washers against the flats in its corresponding threaded f=*ner (either Hex Bolt or Hex Nut) and at least one tab against the adjacent component (either the Upper Flange or Top Plate). These Retainer Washers prevent the nuts from spinningoff.

C-NOME-EP-0189 Rev.01 Page 8 of1% l

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. 6.0 INSTALLATION PROCEDURE FOR HOT LEG PDT MNSA 6.1 Prerequisites 6.1.1 The Hot Leg pipe is machined to the reqmrements of Reference 3.2. The holes are checked with the appropr ate thread gages.

6.1.2 The outer surface of the Hot Leg pipe immediately around the nozzle is free of oirt or rust scale. This surface must be clean for proper MNSA installation.

Notify ABB CENP if condition of Hot Leg pipe is otherwise.

. 6.1.3 The nozzle is invad in the area where the Grafoil Seal seats against the nozzle.

Any scoring or gouges are to be dispositioned by the owner with concurrence by ABB CENP prior to installation.

6.1.4 The Tie Rods (Itern 11) and Hex Bolts (Item 10) shall be coated with two coats of Neolube No. 2 (or other site approved thread lubricant). Let the first coat dry before applying the second coat.

6.1.5 The minimum ambient temperature required at the time the bolts are torqued is 60* F.

6.2 Procedure Note: All Item Nos. referenced in Section 6.0 are from Reference 3.2 and are shown in Figure 2.

6.2.1 Install the Hot Leg MNSA Grafoil Seal halves (Item 4) around the PDT nozzle and position against the Hot Leg pipe.

Note: The 45* cuts in each seal half should mate to create a flat seal.

6.2.2 Place the two halves of the Seal Retainer (Item 5) around the Grafoil Seal at the base of the PDT nozzle. Position the split in the Seal Retainer in alignment with the Hot Leg pips centerline (see Figure 2). Position the split in the Grafoil Seal at least 20* from the split in the Seal Retainer.

6.2.3 Bringthe one half of the Lower Flange (Item 7) into position over the Seal

' Retainer. Be sure the two halves of the Seal Retainer are seated cor:ectly within the Lower Flange LD. Since the split in the Lower Flange is positioned 90* with respect to the Hot Leg pipe centerline (see Figure 2), this half of the Lower Flange should hold both of the Seal Retainers in position.

6.2.4 Bring the remaining half of the Lower Flange into position over the Seal Retains and mass the dovetails in the corresponding Lower Flange halves.

C-NOME-EP-0189 Rev.01 Page 9 of$

Note: Take one Hex Bolt Otem 10) and trial fit into all four Lower Flange 0.562" clearance holes and thread into the 1/2"-20UNF-2B threaded holes in the Hot Leg pipe. This will ensure that the Lower Flange clearance holes and Hot Leg pipe threaded holes line up.

6.2.5 Install the two halves of the Compression Collar Otem 3) around the PDT nozzle, l

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and place over the Grafoil Seal. Position the split in the Compression Collar l approximately 90' from the split in the Seal Retainer.

6.2.6 Bring the Upper Flange - Bottom Otem 6) in position over the Compression Collar. Be sure the flange of both halves of the Compression Collar are seated correctly within the Upper Flange - Bottom LD and over the Grafoil Seal. Also, ensure that the four 0.562" clearance holes in the Upper Flange - Bottom are in alignment with the clearance holes in the Lower Flange.

6.2.7 Bring the Upper Flange - Top (Item 8) into position over the Upper Flange - '

Bottom. Position the key in the Upper Flange -Top toward the slot in the Upper Flange - Bottom and mate the two pieces until the four 0.562" clearance holes in both the Upper Flange pieces are aligned. ,

1 Note: Unless aheady performed in Step 6.1.4, each Hex Bolt shall be coated with two costs of Neolube No. 2 (or other site approved thread lubricant).

Let first coat dry before applying second coat.

6.2.8 Install one Retainer Plate (Item 9) on each of the fou- Hex Head Bolts. Then thread one bolt into each of the threaded holes.

Note: The Retainer Plates must be oriented so that the tabs are facing away from the PDT nozzle. Otherwise, they will not be accessible for bending.

6.2.9 Tighten all four belts until finger tight. Ensure that the remaining hole in each of the Retainer Plates is positioned to provide clearance for a Tie Rod to access the four 3/8"-16UNC-2B holes in the Upper flange - Top.

Naesc. 'lis Tie Rods (Item 11) can be Wmaly installed in the Upper Flange

-Top threaded holes to prevent the Retainer Plate from rotating as the

~ Boksmatorqued.

6.2.10 Tighese au fbar bohn, using a cross pattern, at 1/4 turn increments until the bottom surface of the Upper Flange - Bcttom makes full contact with the top surface of the Lower Flange (metal-to. metal contact). Ensure that a uniform gap exists between the Upper and Lower Flanges during the bolt tightening sequence.

It may be necessary to adjust the turns on a bolt to more or less than 1/4 turn to maintain an even gap.

C-NOME-EP-0189 Rev. 01 Page 10ofgk l

.. 6.2.11 Once metal-to-metal contact is made, torque all frur bolts to 30 i 2 ft.-lbs., using a cross pattem. If a torque greater than 30 i 2 ft-lbs. is required to create metal-to-metal ==*% proceed in increments of 5 ft-lbs. until metal-to-metal contact is  !

, achieved. He maximum torque value allowed is 50 ft-lb. If there is still no metal-to-metal contact at 50 ft-lbs., contact ABB Windsor Engmeerms before ,

prMag. Once metal to-metal contact is made, back off each bolt (one at a time, following the same cross pattem) approximately 1/8 to 1/4 turn. Ren, retorque to 30

  • 2 ft-lbs. Observe some rotation of the bolt head to ensure it is re-torqued to 30 t 2 ft-lbs. As long as the bolts are backed off and retorqued one at a time, the springback force in the Grafoil Seal will not be able to overcome the preload in the remaining three torqued bolts. Metal-to-metal contact will be  !

maintained.

Note: If the Tie Rods were used in Step 6.2.9 as a temporary measure, they must be removed before continuing with Step 6.2.12.

Note: Unless already performed in Step 6.1.4, each Tie Rod shall be coated with two costs of Neolube No. 2 (or other site approved thread lubricant). Let first coat dry before applying second coat.

6.2.12 Place one Hex Nut (Item 12) and one 3/8" Retainer Washer (Item 13) on each end of the four Tie Rods (Item 11). Fully thread (approximately 12 turns) each Tie Rod into each of the 3/8"-16UNC-2B threaded holes in the Upper Flange - Top.

Tighten the Hex Nuts to 75 t 5 in-lbs. on the bottom end to lock the Tie Rods in this position.

6.2.13 Bring the Top Plate (Item 2) into position over the valve body and align the l

clearance holes in the Top Plate over the ends of the Tie Rods. Install the Top Plate in contact with the valve body on the PDT Nozzle.

. 6.2.14 De bottom surface of the Top Plate and the top surface of the valve body should have a .020" i .005" gap at cold conditions. To position the Top Plate with this gap, allow the Top Plate to contact the valve body, then rotate each nut 1/3 turn to set the gap. Maintain the Top Plate in this position. Check gap with a feeler gangs.

Note: De pitch ibr a 3/8"-16UNC thread is 0.062". In other words, for l every one rotation, the nut travels 0.062" linearly. Hus, the 0.020" (1/3 turn) is within the appropriate gap range.  ;

6.2.15 Install the remaining four 3/8" Retainer Washers and four Hex Nuts on the ends of the Tie Rods. While maintaining the Hex Nuts below the Top Plate in position with a wrench, torque the Hex Nuts above the Top Plate to 75

  • 5 in.-lba.

I 6.2.16 After torquing of all threaded fasennars is -x-C bend at least one tab of j C-NOME-EP-0189 Rev.01 Page 11 of,l_94 l 4

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all 3/8" Retainer Washers against the flats in their corr-ading Hex Nuts, and at least one tab against the Top Plate. Additionally, bend at least one tab of the Retainer Plates against a flat on both the Hex Bolt and Hex Nut (2 tabs total).

These Retainer Washers and Retainer Plates prevent loosening of their couM threaded fasteners.

Note: The Retainer Plates do not need to have a tab bent over an adjacent component, since they are locked between the Hex Bolt and Tie Rod to prevent rotation.

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1 Rev.01 Page 12 ofL9& l C-NOME-EP-0189

7.0 INSTALLATION PROCEDURE FOR HOT LEG SAMPLING MNSA 7.1 Prersemisites 7.1.1 The Hot Leg pipe is machined to the requirements of Reference 3.3. The holes are checked with the appropnate thread gages.

7.1.2 The outer surface of the Hot Leg pipe immediately around the nozzle is free of dirt or rust scale. This surface must be clean for prop-r MNSA m' stallation.

Notify ABB CENP if condition of Hot Leg pipe is otherwise.

7.1.3 The nozzle is la=pae*~i in the area where the Grafoil Seal seats against the nozzle.

Any scoring or gouges are to be dispositioned by the owner with concurrence by ABB CENP prior to installation.

7.1.4 The Tie Rods (Item 11) and Hex Bolts (Items 10 & 15) shall be coated with two coats of Neolube No. 2 (or other site approved thread lubricant). Let the first coat dry before apolying the second cost.

7.1.5 The minimum ambient 4 ere required at the time the bolts are torqued is 60*F.

' 7.2 Procedure Note: All Item Nos referenced in Section 7.0 are from Reference 3.3 anui are shownin Figure 3.

7.2.1 Install the Hot Les MNSA Grafoil Seal halves (Item 7) around the sampling nozzle and position against the Hot Leg pipe.

Note: The 45' cuts in each seal half should mate to create a flat seal 7.2.2 Place the two halves of the Seal Retainer (Item 8) around the Grafoil Seal at the base of the sampling nozzle. Position the split in the Seal Retainer in alignment wids the Hot Iag pipe censerline (see Figre 3). Position the split in the Grafoil Sealatleast 20P tom the split in the Seal Retainer.

7.2J Bring theans halfof the Lower Flange (Item 4) into position over the Seal Ratniner. Be suas the two halves of the Seal Retainer are seated correctly within the Lower Flange I.D. Since the split in the Lower Flange is positioned 90* with respect to the Hot leg pipe censerline (see Figure 3), this half of the Lower Flange

' should hold both of the Seal Retainers in position.

i j 7.2.4 Bring the remaining halfof the Lower Flange into position over the Seal j

Retainer and mate the dovetails in the conesponding Lower Flange halves.

C-NOME-EP-0189 Rev.01 Page 13 of1% l 4

_ .. _ _ _ _ __ _ . . ._ _ _ _ _ _ ~ . . . -_ . _ . . _ . _ _ _ . _ . . _ _

Note: Take one Hex Bolt (Item 10) and trial fit into all four Lower Flange 0.562" clearance holes and thread into the 1/2"-20UNF-2B threaded i

holes in the Hot Leg pipe. This will ensure that the Lower Flange i I

clearance hole.s and Hot Leg pipe threaded holes line up.

1 7.2.5 Install the two halves of the Compression Collar (Item 6) around the sampling nozzle, and place over the Grafoil Scal. Position the split in the Compression j Collar approximately 90" from the split in the Seal Retainer.

7.2.6 Bring the Upper Flange - Bottom (Item 5) in position over the Compression i Collar. Be sure that both halves of the Compression Collar are seated correctly i within the Upper Flange - Bottom I.D. and over the Grafoil Seal. Also, ensure that

. the four 0.562" clearance holes in the Upper Flange - Bottom are in alignment with the clearance holes in the Lower Flange.

l 7.2.7 Bring the Upper Flange - Top (Item 3) into position over the Upper Flange -

Bottom. Position the key in the Upper Flange -Top toward the slot in the Upper Flange - Bottom and mate the two pieces until the four 0.562" clearance holes in both the Upper Flange pieces are aligned.

Note: Unless aheady performed in Step 7.1.4, each Hex Bolt shall be coated j with two costs of Neolube No. 2 (or other site approved thread lubricant).  ;

Let first coat dry before applying second coat. j 7.2.8 Install one Retainer Plate (Item 13) on each of the four Hex Head Bolts. Tnen thread one bolt into each of the threaded holes.

Note: The Retainer Plates must be oriented so that the tabs are facing away from the sampling nozzle. Otherwise, they will not be accessible for bending.

7.2.9 Tighten all four bolts until finger tight. Ensure that the remaining hole in each of the Retainer Plates is positioned to provide clearance for a Tie Rod to access the four 3/g"-16UNC-2B holes in the Upper Flange - Top.

Naese: The Tie Rods (Item 11) can be mmgo 3y installed in the Upper Flange

-Top threaded holes to prevent the Retainer Plate from rotating as the Bohssue tosquad.

7.2.10 Tighten all four bolts, using a cross pattern, at 1/4 turn incrananta until the bottom surface of the Upper Flange - Bottom makes full contact with the top surfinc= of the lower Flange (metal-to-metal contact). Ensure that a teiform gap exists ' . ween the Upper and Lower Flanges during the bolt tightening sequence.

It may be necessary to adjust the turns on a bolt to snore or less than 1/4 turn to maintain an even gap.

C-NOME-EP-0189 Rev.01 Page 14 of194 l

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7.2.11 Once metal-to-metal contact is made, torque all four bolts to 30 i 2 ft.-lbs., using a cross ponern. If a to:que greater than 30 i 2 ft-lbs. is required to create metal-to-metal contact, proceed in increments of 5 ft-lbs. until metal-to metal contact is achieved. The ==rimum torque value allowed is 50 ft-lb. If there is still no metal-to-metal contact at 50 ft lbs., contact ABB Windsor Fngi,=mng before )

prWag- Once metal-to-metal contact is made, back off each bolt (one at a i

time, following the same cross pattern) approxunately 1/8 to 1/4 turn. Then. l retorque to 30 i 2 ft-lbs. Observe some rotation of the bolt head to ensure it is re- 1 I

torqued to 30 i 2 ft-lbs. As long as the bolts are backed off and retorqued one at a time, the spnngback force in the Grafoil Seal will not be able to overcome the l preload in the remaining three torqued bolts. Metal-to-metal contact will be l m.i...i_1 l

Note: If the Tie Rods were used in Step 7.2.9 m a temporary measure, they must be removed before continuing with Step 7.2.12.

7.2.12 Install the Clamp (Item 14) in position over the pipe elbow in the sampling line. ,

Note: Unless already performed in Step 7.1.4, each Hex Head Bolt shall be I i

coated with two costs of Neolube No. 2 (or other site approved thread q

lubricant). Let first coat dry before applying second cost.

7.2.13 Install three 1/2" Retainer Washers (Item 16) on the three Hex Head Bolts Otem 15). Place each of the Hex Head Bolts and Retainer Washers into the three cose g-r Eng clearance holes in the Clamp. Thread the Hex Head Bolts into the 1/2"-13UNC-2B holes in the Clamp until finger tight.

'7.2.14 Torque the three. Hex Head Bolts to 30 t 2 ft-lbs. After torquing, bend one tab on each of the Retainer Washers against the Clamp and one tab of each against a flat en the Hex Head Bolt, to prevent loosening.

Note: Unless already performed in Step 7.1.4, each Tie Rod shall be coated with two costs of Neolube No. 2 (or other site approved thread lubricant). Let first cost dry before applying second coat.

7.2.15 Plass ame HexNut (Item 9) and one 3/8" Retainer Washer (Item 12) on each end of tbd Asur Tie Rods (Item 11). Fully thread (approximately 12 turns) each Tie Rod ines such of the 3/8"-16UNC-2B threaded holes in the Upper Flange - Top. l Tighese the Hex Nuts to 75 i 5 in-lbs. on the bottom end to lock the Tie Rods in this position.

7.2.16 Bring the Top Plass (Item 2) into position over the Clamp and align the clearance holes in the Top Plate over the ends of the Tie Rods. Install the Top Plate in contact with the Clamp on the sampling nozzle.

C-NOME-EP4139 Rev.01 Page 15 ofl_94 l .

. 7.2.17 The bottom swface of the Top Plate and the top swface of the Clamp shvuld have a .043" t .005" gap at cold conditions. To position the Top Plate with thit gap,

. allow the Top Plate to contact the Clamp, then rotate each nut 2/3 turn to w t the gap. Maintain the Top Plate in this position. Check gap with a feeler gaug e.

Note: The pitch for a 3/8"-16UNC thread is 0.062". In other words, for every one rotation, the nut travels 0.062" linearly. 0.043" (2/3 tum)is within the appropriate gap range.

7.2.18 Install the remaining four 3/8" Retainer Washers and four Hex Nuts on the ends of the Tie Rods. While maintaining the Hex Nuts below the Top Plate in position with a wrench, torque the Hex Nuts above the Top Plate to 75 i 5 in.-lbs.

7.2.19 After torquing of all threaded fasteners is complete, bend at least one tab of all 3/8" Retainer Washers against the flats in its corresponding Hex Nut, and at least one tab against the Top Plate. Additionally, bend at least one tab of the Retainer Platea against a flat on both the Hex Bolt and Hex Nut (2 tabs total).

These Retainer Washers and Retainer Plates prevsnt loosening of their correspondirg threaded fasteners.

Note: The Retainer Plates do not need to have a tab bent over an adjacent component, since they are locked between the Hex Bolt and Tie Rod to prevent rotation.

1 4

. C-NOME-EP 0189 Rev.01 Page 16 ofHL l N,

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