Pei Rp 100
Place sand backfill into the excavation in to inch lifts and compact after each lift. Refer to the manufacturer's installation instructions for backfill material specifications and back- fill procedures. Grade the bedding for the vent piping carefully to avoid sags or traps in the line where liquid could collect. Generally, requirements for anchorage are deter- mined by the conditions associated with each instal- lation.
Use an ice pick or similar thin probe to contact the anode through the packaging. Disconnecting power to an impressed-curren cathodic-protection system, or to an electronic leak- detection device, nullifies their effectiveness.
Visually inspect all joints and fittings for drips or moisture indicating a leak. The following are generic installation guidelines for impressed-current sys- tems. Repair damage to anode connec- tions or coatings according to the manufacturer's instruc- tions. In the case of cylindrical tanks, this is found by multiplying the actual tank diameter by its length.
In general, adhere to the fol- lowing pressure-test limits and procedures. Dimensions requiredfor hold-down calculations. Additional anodes and bonding may be required.
Recommended practices include the following considerations. Personnel who work in and around sumps should be properly trained in identifying the health and safety hazards posed by sumps and provided with appro- priate equipment.
The pressure is most often relieved by releasing flammable vapors at grade. Exercise care when installing leak-detection probes that contain metallic components. Do not air test a tank that has previously contained flammable or com- bustible liquids. Recommended procedures for testing during Single-walled piping Tightness-test piping Sec.
Install overfill devices according to the manufacturer's instructions. Also indicate the method and location of connections and the location of test sta- tions. Securely anchor the valve.
Secure all fill caps and pumps during unattended periods. Storage systems discussed in this recommended practice are usually regulated by federal, state, or local agencies. Be aware that flexible-piping systems may require different trenching configurations than rigid piping. Care in the selection of a suitable fabric is essential. In a remote-fill installation, the gauge riser above the flow shut-off device must be properly sealed or else product will pour from the gauge opening when the shut-off device closes.
Construct aboveground vent risers using appropriately sized steel pipe. Consult the manufacturer's certification of performance data to determine the applicabil- ity of line-leak detectors to specific installa- tions. If corrosion protection is still not adequate, the cathodic-protection system should be repaired or modi- fied, during which time the facility may remain opera- tional. Connecting structures equipped with galvanic cathodic protection to unprotect- ed metallic structures or to the facility electrical ground will nullify corrosion protection.
Field- installed anodes are generally attached to the piping through a capper lead wire and packaged in low-resistiv- ity backfill. Methods of providing flexibility.
The following sections describe test procedures that should be performed on new secondary-containment piping before backfilling, during construction, and before placing a sys- tem into operation. Spi ll-containment Check the operation of the liquid Piping Careful inspection. The weight of material decreases when submerged.
Monitoring the air pressure during subsequent construction can pro- vide early warning of piping damage. Locate tanks in a secure area where the chance of accidental damage or vandalism will be minimized.
Apply a soap solution to all joints and piping surfaces and inspect for bubbles that indicate that a leak is present. Make all piping connections within the confines of containment sumps. The ability to recognize and react to unex- pected or abnormal conditions encountered during a tank installation requires experience, as well as skill. The plans should describe the property, identify the size and location of the tanks, indicate the liq- uids to be stored, and provide the location of the dis- pensers and piping.
Kansas City, am disco dancer video song Missouri Michael W. Tank and pipe systems that are constructed of corrosion-resistant materials do not require additional cathodic protection. Test the electrical continuity between the tank and associated piping. Cathodic protection is essential for pro- tecting coating flaws holidays.
Never place chains or cables around the shell of the tank. Handle piping carefully to avoid damage to piping materials during assembly, backfilling, and testing.
Individual tank manufacturers establish the max- imum acceptable deflection. Flexible con- nectors are not required on flexible pipe. If mechanical compaction is employed, take care to protect the tank from damage. Verify that the satellite-dispenser piping is monitored by the line-leak detector. Refer to Appendix C for more information concerning these documents.
PEI RP Updated - UST Training
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