|
C7
<br />HOLDDOWN STRAPS:
<br />Xerxes FRP straps must be used when a tank is to be anchored.
<br />The location of holddown straps for each tank is marked on the
<br />tank by the arrow (> <) symbol. Complete data for holddown
<br />straps are given in Table 7-2 and Figure 7-2.
<br />CAUTION: Place the straps only in the locations designated by the
<br />arrow symbol (><).
<br />To evenly distribute buoyancy loads, tighten all holddown straps
<br />uniformly until they are snug over the ribs but cause no deflection
<br />of the tank. Make an intermediate measurement of the tank diame-
<br />ter AFTER the straps have been installed and tightened.
<br />HARDWARE AND ANCHORING POINTS:
<br />Anchoring hardware and anchor points must be sized according to
<br />Table 7-3 and manufactured to industry standards and dimensions.
<br />The installing contractor is responsible for providing hardware and
<br />anchor points of sufficient strength. The particular configuration
<br />of hardware will be determined by the owner or the owner's
<br />representative. Locate the anchor points as shown in Table 7-2
<br />and Figure 7-2. Refer to dimension "E". Align all anchor points with
<br />the marked (> <) location on the tanks, within a tolerance of ± 1 ".
<br />For specific information on hardware and its use, consult the
<br />hardware manufacturer.
<br />CAUTION: Use only appropriate sized hardware with the strap
<br />eye. Oversized hardware may damage the strap eye and result
<br />in personal injury or property damage. See Figure 7-4 for strap
<br />eye dimensions
<br />10111 4m,
<br />NOTE: Drop -forged type turnbuckle may be used in place of all or a portion of
<br />wire rope
<br />NOTE: All exposed metal on the holddown straps, turnbuckles and/or threaded rod
<br />must he coated or galvanized to prevent corrosion (Figure 7-4A).
<br />NOTE: when fastening wire rope, use a minimum of three clamps on each joint.
<br />Use shackle -tripe or chair -type clamps as appropriate (Figure 74A).
<br />STRAP.,
<br />STRAP EVE
<br />TURNBUCKLE,
<br />WIRE WIRE
<br />ROPE ROPE
<br />CLAMPSo
<br />/
<br />'&88 oBSo
<br />11111=_-11111=11111-11!11-
<br />!1111=11111 -11111 -11111 -III!! -11111
<br />R- POSTINISTALLATIC
<br />WARNING: Do not use air pressure to test tanks that contain
<br />flammable or combustible liquids or vapors, and do not perform
<br />any post installation pressure test. The fuel/air mixture may
<br />explode and cause death, severe personal injury or property
<br />damage. Tanks that will be ballasted with a flammable product
<br />should be air tested before ballasting.
<br />WARNING: If product is used as ballast, exercise special care in
<br />handling. Safeguard against sparks, fire or product spills. Improper
<br />handling of product can cause a fire or explosion, and may result
<br />in death, severe personal injury or property damage.
<br />INTERMEDIATE DEFLECTION MEASUREMENT
<br />After backfill is brought to the top of the tank, make an intermediate
<br />measurement of vertical deflection according to the instructions
<br />in Section 13.
<br />TEST
<br />After the tank has been measured and vertical deflection is deter-
<br />mined to be within the limits specified by Xerxes. the tank must be
<br />pressure tested to ensure that no damage occurred during installa-
<br />tion. The procedure in Section 2 Pre -installation Testing should be
<br />followed, soaping all exposed areas of the tank and all fittings.
<br />Because most of the tank exterior is no longer visible, the tank
<br />must be tested by checking the gauge for one hour at the test
<br />manifold for any drop in pressure. Carefully relieve the pressure in
<br />the tank and if applicable remove the hose/valve assembly or quick
<br />disconnect assembly from dry Double Wall tanks.
<br />WARNING: Do not use air pressure to test tanks that contain
<br />flammable or combustible liquids or vapors and do not perform
<br />any post installation pressure test. The fuel/air mixture may
<br />explode and cause death, severe personal injury, or property
<br />damage. Tanks that will be ballasted with a flammable product
<br />should be air tested before ballasting.
<br />WARNING: If product is used as ballast, exercise special care in
<br />handling. Safeguard against sparks, fire or product spills. Improper
<br />handling of product can cause a fire or explosion, and may result
<br />in death, severe personal injury or property damage.
<br />The tank may be ballasted after the backfill is even with the top
<br />of the tank and post -installation testing, if applicable, has been
<br />successfully completed. Only under wet -hole conditions as
<br />described in Section 6, should ballast be added before the backfill
<br />is even with the top of the tank. When filling the tank, make sure
<br />the tank is properly vented. The vent must be large enough to
<br />allow the displaced air to escape.
<br />MINIMUM TURNBUCKLE DIAMETER
<br />MINIMUM
<br />TANK
<br />(BY TYPE)
<br />WIRE ROPE
<br />DIAMETER
<br />DIAMETER
<br />HOOK
<br />JAW
<br />EYE
<br />4'
<br />3/4"
<br />1/2"
<br />1/2"
<br />3/8"
<br />6
<br />3/4'
<br />112"
<br />112"
<br />3/8"
<br />8
<br />1-114"
<br />3/4"
<br />! 3/4'
<br />112"
<br />10
<br />1-114**
<br />3/4"
<br />! 3/4"
<br />112"
<br />12*
<br />11/4"
<br />3/4"-3/4"
<br />1/2"
<br />10111 4m,
<br />NOTE: Drop -forged type turnbuckle may be used in place of all or a portion of
<br />wire rope
<br />NOTE: All exposed metal on the holddown straps, turnbuckles and/or threaded rod
<br />must he coated or galvanized to prevent corrosion (Figure 7-4A).
<br />NOTE: when fastening wire rope, use a minimum of three clamps on each joint.
<br />Use shackle -tripe or chair -type clamps as appropriate (Figure 74A).
<br />STRAP.,
<br />STRAP EVE
<br />TURNBUCKLE,
<br />WIRE WIRE
<br />ROPE ROPE
<br />CLAMPSo
<br />/
<br />'&88 oBSo
<br />11111=_-11111=11111-11!11-
<br />!1111=11111 -11111 -11111 -III!! -11111
<br />R- POSTINISTALLATIC
<br />WARNING: Do not use air pressure to test tanks that contain
<br />flammable or combustible liquids or vapors, and do not perform
<br />any post installation pressure test. The fuel/air mixture may
<br />explode and cause death, severe personal injury or property
<br />damage. Tanks that will be ballasted with a flammable product
<br />should be air tested before ballasting.
<br />WARNING: If product is used as ballast, exercise special care in
<br />handling. Safeguard against sparks, fire or product spills. Improper
<br />handling of product can cause a fire or explosion, and may result
<br />in death, severe personal injury or property damage.
<br />INTERMEDIATE DEFLECTION MEASUREMENT
<br />After backfill is brought to the top of the tank, make an intermediate
<br />measurement of vertical deflection according to the instructions
<br />in Section 13.
<br />TEST
<br />After the tank has been measured and vertical deflection is deter-
<br />mined to be within the limits specified by Xerxes. the tank must be
<br />pressure tested to ensure that no damage occurred during installa-
<br />tion. The procedure in Section 2 Pre -installation Testing should be
<br />followed, soaping all exposed areas of the tank and all fittings.
<br />Because most of the tank exterior is no longer visible, the tank
<br />must be tested by checking the gauge for one hour at the test
<br />manifold for any drop in pressure. Carefully relieve the pressure in
<br />the tank and if applicable remove the hose/valve assembly or quick
<br />disconnect assembly from dry Double Wall tanks.
<br />WARNING: Do not use air pressure to test tanks that contain
<br />flammable or combustible liquids or vapors and do not perform
<br />any post installation pressure test. The fuel/air mixture may
<br />explode and cause death, severe personal injury, or property
<br />damage. Tanks that will be ballasted with a flammable product
<br />should be air tested before ballasting.
<br />WARNING: If product is used as ballast, exercise special care in
<br />handling. Safeguard against sparks, fire or product spills. Improper
<br />handling of product can cause a fire or explosion, and may result
<br />in death, severe personal injury or property damage.
<br />The tank may be ballasted after the backfill is even with the top
<br />of the tank and post -installation testing, if applicable, has been
<br />successfully completed. Only under wet -hole conditions as
<br />described in Section 6, should ballast be added before the backfill
<br />is even with the top of the tank. When filling the tank, make sure
<br />the tank is properly vented. The vent must be large enough to
<br />allow the displaced air to escape.
<br />
|