Modco Industries LLC, 10650 FM 1484 Conroe, TX 77301 / Phone: 936-539-9222 / FAX: 936-622-6818

MODCO CLOSURES Operation, Maintenance & Welding Instructions

MODCO FIGURE 500 HINGED CLOSURES

Modco Industries LLC, 10650 FM 1484 Conroe, TX 77301 / Phone: 936-539-9222 / FAX: 936-622-6818

MODCO FIGURE 500 VERTICAL HINGED CLOSURESOPERATION AND MAINTENANCE INSTRUCTIONS

PROPER HINGE ADJUSTMENT ON THE MODCO FIG. 500 CLOSURE IS NECESSARY TO INSURE THECLOSURE HINGE PROVIDES PROPER ALIGNMENT OF CAP AND SUB, AND AFFORDS BALANCE OFCAP TO ELIMINATE THREAD DRAG DURING MAKE-UP AND ALLOW PROPER METAL TO METALCONTACT OF CAP SEALING FACE AND O-RINGS GROOVE LANDS.

VERY IMPORTANT: TO PREVENT SUB WARPAGE, THE WELDING INSTRUCTIONSATTACHED TO EACH CLOSURE SHOULD BE FOLLOWED BY THOSEFABRICATING THE CLOSURE.

A. PRIOR SERVICE HINGE ADJUSTMENTS:

IF ANY DIFFICULTY IS ENCOUNTERED DURING MAKE-UP OF CAP ONTO SUB OR IFEXCESSIVE THREAD DRAG IS NOTICED, THE FOLLOWING ADJUSTMENTS SHOULD BEMADE.

1. LATERAL ALIGNMENT AND CENTERING OF CAP ONTO SUB THIS ADJUSTMENTEASILY ACCOMPLISHED BY ADJUSTING LATERAL POSITION NUTS LOCATED ON THEHINGE ARM.

2. VERTICAL CAP ADJUSTMENT THIS ADJUSTMENT EASILY ACCOMPLISHED BYLOOSENING THE SET SCREW THAT HOLDS THE BRASS HEX NUT AND USING AWRENCH, TURN THE BRASS HEX NUT CLOCKWISE TO RAISE THE CAP OR COUNTERCLOCKWISE TO LOWER THE CAP. (ONLY SLIGHT ADJUSTMENT OF THE NUT ISNECESSARY.)

TO CHECK ADJUSTMENT, USE WRENCH TO KEEP BRASS HEX NUT STATIONARY ANDTURN CAP BACK AND FORTH ON SUB TO DETERMINE THREAD DRAG.

AFTER MINIMUM THREAD DRAG IS OBTAINED, TIGHTEN SET SCREW THAT HOLDSTHE BRASS HEX NUT IN PLACE.

NOTE: THE HINGE DESIGN PERMITS A 360 DEGREE SWING OF CAP AFTER IT ISUNSCREWED FROM THE SUB.

WARNING: CLOSURE WILL TIP OVER IF CAP IS SWUNG TO THE SIDE AND THESUB IS NOT RESTRAINED. SERIOUS INJURY MAY RESULT.

Modco Industries LLC, 10650 FM 1484 Conroe, TX 77301 / Phone: 936-539-9222 / FAX: 936-622-6818

B. MARKING CAP AND SUB FOR METAL TO METAL CLOSED POSITION:

AFTER FABRICATION OF CLOSURE, THE FOLLOWING PROCEDURE SHOULD BE USED TOESTABLISH METAL TO METAL FULL CLOSED POSITION OF CAP AND SUB:

1. PROCEDURE TO FOLLOW- REMOVE O-RING FROM SUB AND USING ACTUATOR TOOLMAKE-UP CAP ONTO SUB UNTIL METAL TO METAL SEATING OF CAP AND SUB ISOBTAINED. THIS CAN BE DETERMINED WHEN THERE IS NO MOVEMENT OF CAPONTO SUB. THIS CAN BE CHEDCKED, EITHER BY VISUALLY CHECKING MOVEMENT OFCAP OR BY PLACING FINGERS ACROSS CAP AND SUB T FEEL CAP MOVEMENT. MARKARROWS ON BACK OF CAP AND SUB TO INDICATE POINT AT WHICH THREADS AREFULLY ENGAGED AND THERE IS METAL TO METAL CONTACT BETWEEN CAP AND SUB.THESE REFERENCE ARROWS CAN BE USED ON ALL FUTURE OPENINGS AND MAKE-UP OF CLOSURE.

C. OPERATION:

1. CLOSING TIGHTEN CAP ONTO SUB USING ACTUATOR DEVICE.

IMPORTANT: DO NOT ATTEMPT TO TIGHTEN CAP UNDER PRESSURE.

AFTER CLOSURE IS COMPLETELY MADE-UP, SCREW PRESSUREWARNING VALVE STEM INTO BODY ON SUB AND TIGHTEN.

2. OPENING UNSCREW PRESSURE WARNING DEVICE STEM FROM BODY ON SUBAND SCREW INTO RETAINER ON CAP.

WARNING: - DO NOT UNSCREW PRESSURE WARNING DEVICE BODY FROM SUB WHILEPRESSURIZED. INJURY MAY RESULT.

USING ACTUATOR DEVICE, LOOSEN CAP AND UNSCREW FROM SUB, SWINGCAP TO THE SIDE.

Modco Industries LLC, 10650 FM 1484 Conroe, TX 77301 / Phone: 936-539-9222 / FAX: 936-622-6818

D. PREVENTATIVE MAINTANCE:TO INSURE TROUBLE FREE OPERATION OF THE CLOSURE, THE FOLLOWING PROCEDURESSHOULD BE PERFORMED:

1. AT EVERY CLOSURE OPENING:(a) ALWAYS CLEAN CAP AND SUB THREADS, AND LUBRICATE THOURGHLY.(b) ALWAYS CLEAN O-RING, O-RING GROOVE, SUB FACE, CAP SEALING FACE, AND

LUBRICATE THOURGHLY.

2. AT REGULAR INTERVALS:(a) LUBRICATE THROUGH GREASE ZERKS ON CAP CENTER PIN BUSHING AND JIB

COLUMN HOUSING.(b) LUBRICATE ACTUATOR DEVICE THREADS.

E. O-RING INFORMATION:THE MODCO O-RINGS ARE SPECIALLY DESIGNED FOR MODCO CLOSURES. THE O-RINGS ARE DIE-MOLDED (FROM A CONTINOUS MOLD) TO AN EXACT CROSS CECTIONDIMENSION TO FIT THE O-RING GROOVE. STANDARD MATERIAL IS BUNA A 70 DURO-HOWEVER OTHERCOMPOUNDS ARE AVAILABLE. CONSULT FACTORY.

Modco Industries LLC, 10650 FM 1484 Conroe, TX 77301 / Phone: 936-539-9222 / FAX: 936-622-6818

MODCO FIGURE 500 HINGED CLOSURES

WELDING INSTRUCTIONS

1. THE CLOSURE SUB SHOULD BE THE LAST ITEM WELDED TO THE VESSEL OR BARREL.

VERY IMPORTANT: WEDGING OF CLOSURE SUB TO BARREL OR SHELL COULD

CAUSE CLOSURE SUB WARPAGE OR OUT- OF- ROUNDNES,

WHICH COULD PREVENT CLOSURE FROM SEALING.

2. UNSCREW CAP AND REMOVE 0-RING FROM THE SUB.

3. TACK WELD SUB EVERY 4 TO 6 INCHES AROUND CIRCUMFERANCE AND RE-CHECK VERTICAL POSITION OF SUB FACE.

4. CAP MY BE SCREWED ONTO SUB TO PROTECT SUB THREADS FROM WELDING SPLATTER AND FOREIGN PARTICLES. (OPTIONAL)

5. AS A PRECAUTION AGAINST SUB DISTORION DURING WELDING, IT IS SUGGESTED THAT

THE SUB BE BRACED FROM 12 OCLOCK TO 6 OCLOCK AND 3 OCLOCK TO 9 OCLOCK.

THIS ESPECIALLY IMPORTANT ON THIN WALLS SUBS.

6. THE FOLLOWING PROCEDURE IS RECOMMENDED BY LINCOLN ELECTRIC COMPANY AND

THEIR BULLETIN PIPELINE WELDING:

Modco Industries LLC, 10650 FM 1484 Conroe, TX 77301 / Phone: 936-539-9222 / FAX: 936-622-6818

WELD STRINGER BEADS AND HOT PASS WITH TWO MEN ON OPPOSITE SIDES TO EQUALIZE WELDING STRESSES. FOLLOW THE SEQUENCE SHOWN IN DIAGRAM. MAKE CERTAIN THAT THE WELDING FROM 7:30 BACK TO 4:30 PROCEEDS WITHOUT INTERRUPTION OR ANY TIE-IN AT 6:00

VERY IMPORTANT: CAREFUL ATTENTION TO WELDING HEAT AND PROCEDURE IS RECOMMENDED TO AVOID DISTORTION OF SUB FACE AND THREADS.

7. TO INSURE THAT NO WARPAGE HAS OCCURRED DURING WELDING, THE FOLLOWING

PROCEDURE MAY BE USED TO BLUE CHECK THE SEALING SURFACES: 1. APPLY EVEN LAYER OF NON-DRYING PRUSSIAN BLUE TO THE CAP SEALING SURFACE. 2. SCREW CAP ONTO SUB TIGHT BY USING ACTUATOR DEVICE. 3. REMOVE CAP AND CHECK FOR CONTINUOUS TRACE OF BLUEING ON O-RING LANDS

OF SUB FACE.

8. LUBRICATE O-RING AND REPLACE IN GROOVE IN SUB FACE.

9. IMPORTANT: FOR VESSELS OR BARRELS THAT REQUIRE POST HEAT TREATMENT AND STRESS RELEIVING, IT IS IMPORTANT THAT THE BEARINGS IN THE JIB COLUMN HOUSING AND HINGE ARE BE REMOVED AS WELL AS THE TROLLEY ASSEMBLY AND PRESSURE WARNING DEVICE.

10. REFER TO THE MODCO FIGURE 500 CLOSURES OPERATION AND MAINTENANCE INSTRUCTIONS FOR HINGE ADJUSTMENTS AND LUBRICATION PROCEDURES AFTER FABRICATION OF CLOSURE IS COMPLETED.