Tank Roof Seals Inspection Checklist

IPE Engineering Practice IPE-EP-9-1-3C

Document number: IPE-EP-9-1-3C · Section: 9 — Storage Tanks

THE MANUFACTURER OF EQUIPMENT PURCHASED BY COMPANY SHALL BE RESPONSIBLE FOR MEETING ALL APPLICABLE REQUIREMENTS OF THE ENGINEERING PRACTICE AND OTHER DOCUMENTS REFERENCED THEREIN REGARDLESS OF WHETHER THE ITEMS ARE INSPECTED BY A REPRESENTATIVE.

REFERENCES

THE LATEST EDITION OF THE FOLLOWING STANDARDS AND PUBLICATIONS ARE REFERRED TO HEREIN

ENGINEERING PRACTICES

EP 9-1-3 TANK ROOF SEALS

FREQUENCY OF CONTACT BY THE INSPECTOR (CHECK ONE)

LEVEL L: ON CALL BY FABRICATOR LEVEL 2: ONCE EVERY TWO WEEKS LEVEL 3: EVERY WEEK

LEVEL 4: DAILY

LEVEL 5: RESIDENT

LEVEL 6. OTHER, SPECIFY

LEVEL OF INSPECTION BY THE INSPECTOR (CHECK ONE)

LEVEL L: PREFABRICATION MEETING, DOCUMENT REVIEW, AND FINAL INSPECTION

LEVEL 2: PREFABRICATION MEETING, DOCUMENT REVIEW. REVIEW ITEMS. AND FINAL INSPECTION LEVEL 3: PREFABRICATION MEETING. DOCUMENT REVIEW, REVIEW ITEMS. WITNESS POINTS, AND FINAL

INSPECTION

LEVEL 4: PREFABRICATION MEETING, DOCUMENT REVIEW, REVIEW ITEMS, WITNESS POINTS, HOLD POINTS, AND FINAL INSPECTION

LEVEL 5. OTHER, SPECIFY

EQUIPMENT ID JOB NO. DOCUMENT NO REV.

IN-SERVICE INSPECTION MEASURE AND RECORD SEAL-TO SHELL GAPS: AT LOW PUMP-OUT AT MIDSHELL AT SAFE OIL HEIGHT MEASURE AND RECORD ANNULAR SPACE AT 30-FOOT SPACING (MINIMUM OF 4 QUADRANTS) AROUND ROOF. MEASUREMENTS SHOULD BE TAKEN IN DIRECTLY OPPOSITE PAIRS. OPPOSITE PAIR 1 OPPOSITE PAIR 2 CHECK OF SEAL FABRIC ON PRIMARY SHOE SEALS IS PULLING HOSES AWAY FROM SHELL (FABRIC NOT WIDE ENOUGH) INSPECT FABRIC FOR DETERIORATION, HOLES, TEARS, AND CRACKS. INSPECT VISIBLE METALLIC PARTS FOR CORROSION AND WEAR. INSPECT FOR OPENNINGS IN SEALS THAT WOULD PERMIT VAPOR EMMISSION. INSPECT FOR PROTRUDING BOLT OR RIVET HEADS AGAINST THE SHELL. PULL BOTH PRIMARY AND SECONDARY SEAL SYSTEMS BACK ALL AROUND THE SHELL TO CHECK THEIR OPERATION. INSPECT SECONDARY SEALS FOR SINGS OF BULKLING OR INDICATIONS THAT THEIR ANGLE WITH THE SHELL IS TOO SHALLOW. INSPECT THE SYNTHETIC EDGE OF THE SECONDARY SEAL FOR HORIZONTAL CRACKING OR TRARS. INSPECT WEDGE-TYPE WIPER SEALS FOR FLEXIBILITY, RESILIENCE, CRACKS, AND TEARS. OUT-OF-SERVICE INSPECTION PRIMARY SHOE ASSEMBLY INSPECT HANGER ATTACHMENT TO ROOF RIM FOR THINNING, BENDING, BROKEN WELDS, AND WEAR OF PIN HOLES. INSPECT CLIPS WELDED TO ROOF RIM FOR THINNING.SHOES: INSPECT FOR THINNING AND HOLES IN SHOES. INSPECT FOR BIMETAL BOLTS, CLIPS, AND ATTACHMENTS. INSPECT FOR PROTRUDING BOLT HEADS ON OUTSIDE SURFACE OF SHOES SEAL FABRIC: INSPECT FOR DETERIORATION, STIFFENING, HOLES, AND TEARS IN FABRIC. MEASURE LENGTH OF FABRIC FROM TOP OF SHOE TO ROOF TIM, AND CHECK AGAINST MAXIMUM ANTICIPATED ANNULAR SPACE AS ROOF OPERATES. INSPECT ANY MODIFICATION OF SHOES OVER SHELL NOZZLES, MIXERS, ETC., FOR CLEARANCE. INSPECT SHOES FOR DAMAGE CAUSED BY STRINKING SHELL NOZZLES, MIXERS, ETC. RIM-MOUNTED SECONDARIES INSPECT THE RIM-MOUNTED BOLTING BAR FOR CORROSION AND BROKEN WELDS. MEASURE AND SHCRT SEAL-TO-SHELL GAPS. VISUALLY INSPECT SEAL FROM BELOW, LOOKING FOR HOLES AS EVIDENT BY LIGHT. INSPECT FABRIC FOR DETERIORATION AND STIFFNESS. INSPECT FOR MECHANICAL DAMAGE, CORROSION, AND WEAR ON TIP IN CONTACT WITH SHELL. INSPECT FOR CONTACT WITH OBSTRUCTIONS ABOVE TOP OF SHELL. PRIMARY TOROIDAY ASSEMBLY REMOVE 4 SECTIONS OF FOAM LOG FOR INSPECTION, ON 90-DEGREE LOCATIONS. INSPECTION SEAL FABRIC FOR WEAR, DETERIORATION, HOLES, AND TEARS. INSPECT HOLD-DOWN SYSTEM FOR BUCKLING OR BENDING. INSPECT FOAM FOR LIQUID ABSORPTION AND DETERIORATION.

INSPECTOR SIGN-OFF

INITIALS	NAME	COMPANY	SOCIAL SECURITY NUMBER

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