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Sierra Sales - From Philadelphia, serving the world of PE TANKS


4. TANK ATTACHMENTS

4.1 U-VENTS

4.1.1 Standard u-vents are constructed from PVC or CPVC and are provided with a loose male adapter. This allows the u-vent to be cut to the desired height. A threaded or solvent welded socket fitting can be used. U-vents can be purchased with an optional bug screen insert (CPVC and fiberglass materials) installed.

4.1.2 When installing the u-vent in a solvent weld socket fitting, solvent weld the u-vent with the proper solvent cement in the desired position into a previously installed fitting. If the u-vent is to be used in a threaded fitting, solvent weld the male adapter provided to the u-vent and install the u-vent assembly into a previously installed threaded fitting. Refer to Figure 4.1 for an exploded illustration of this as-sembly.


Figure 4.1

4.2 DOWN PIPES (TANK FITTING SUPPORTED) -EXTERNAL AND/ OR INTERNAL

4.2.1 Down pipes are shipped loose and have been cut to size to meet customer specifications. All down pipes shall be supported at 5 ft. maximum intervals with the support structures provided.

4.2.2 Assemble the piping loosely using Figure 4.2, the guidelines detailed below, and the customer approved tank drawing to ensure all parts are present and cut to meet the customer's requirements. As soon as all parts have been checked, assemble the parts with solvent weld cement and/ or threaded connections as shown in Figure 4.2.

4.2.3 Assemble and install support structures as shown in Figure 4.2 (without the saddle clamp cover caps and clips). Make sure the support clamp orientation is correct (with the small width of the wedge toward the top of the tank) and that the plugged support pipes are installed with the plugged end as close to the support fitting as possible. Assemble and install piping as per the customer approved drawing. As piping is being installed on the tank, lock it in place with the saddle clamp cover caps and clips provided (make sure that the sealing o-ring is in the proper position as the pipe is po-sitioned into the saddle support body). Seal all threaded pipe connections with Teflon 7 pipe sealant and connect solvent weld sockets with solvent cement.


Figure 4.2

4.3 DOWN PIPES (WELDED BOSS SUPPORTED) -EXTERNAL AND/ OR INTERNAL

4.3.1 Down pipes are shipped loose and have been cut to size to meet customer specifications. All down pipes shall be supported at 5 ft. maximum intervals with the support structures provided.

4.3.2 Assemble the piping loosely using Figure 4.3, the guidelines detailed below, and the customer ap-proved tank drawing to ensure all parts are present and cut to meet the customer's requirements. As soon as all parts have been checked, assemble the parts with solvent weld cement and/ or threaded connections as shown in Figure 4.3.

4.3.3 Assemble and install support structures as shown in Figure 4.3 (without the saddle clamp cover caps and clips). Since the support fitting does not penetrate the tank wall, the threaded connection to the support fitting does not need pipe sealant. Make sure the support clamp orientation is correct (with the small width of the wedge toward the top of the tank). Assemble and install piping as per the customer approved drawing. As piping is being installed on the tank, lock it in place with the saddle clamp cover caps and clips provided (make sure that the sealing o-ring is in the proper position as the pipe is positioned into the saddle support body). Seal all threaded pipe connections (except the support fittings) with Teflon 7 pipe sealant and connect solvent weld sockets with solvent cement.


Figure 4.3

4.4 DOWN PIPES (WELDED PE SUPPORTED) -EXTERNAL AND/ OR INTERNAL

4.4.1 Down pipes are shipped loose and have been cut to size to meet customer specifications. All down pipes shall be supported at 5 ft. maximum intervals with the support structures provided.

4.4.2 Assemble the piping loosely using Figure 4.4, the guidelines detailed below, and the customer ap-proved tank drawing to ensure all parts are present and cut to meet the customer's requirements. The piping should be inserted into the holes in the welded support structures prior to installing the fitting in the tank. As soon as all parts have been checked, assemble the parts with solvent weld cement and/ or threaded connections as shown in Figure 4.4. Seal all threaded pipe connections with Teflon 7 pipe sealant and connect solvent weld sockets with the correct type of solvent cement.


Figure 4.4

4.5 DOWN PIPE -INDEPENDENTLY SUPPORTED -(EXTERNAL ONLY)

4.5.1 Down pipes are shipped loose and have been cut to size to meet customer specifications. All down pipes shall be supported at 42 in. maximum intervals with the support clamps provided.

4.5.2 Assemble the piping loosely using Figure 4.5, the guidelines detailed below, and the customer ap-proved tank drawing to ensure all parts are present and cut to meet the customer's requirements. Mark the strut post base on the concrete when in proper position. Install 2 ea. 3/ 8" adhesive anchors and bolt base into position. As soon as all parts have been checked, assemble the parts with solvent weld cement and/ or threaded connections as shown in Figure 4.5.

4.5.3 Assemble and install support structures as shown in Figure 4.5. Make sure the support clamps are spaced evenly. Locate the strut catchers and twist 90° to lock in place. Install the clamps to the strut catchers with the #10 screws provided. Clamps 3 in. and larger require 2 ea. strut catchers, #10 screws and #10 washers. The pipe will click into position in the clamps. Make sure all clamps have clicked to full engagement and are tight. Assemble and install piping as per the customer approval drawing. Seal all threaded pipe connections with Teflon 7 pipe sealant and connect solvent weld sockets with solvent cement.


Figure 4.5

4.6 FLEXIBLE SIGHT LEVEL GAGES USE ORIFICE SPACER ON DOUBLE WALL TANK ASS'Y.

4.6.1 Sight level gage assemblies are shipped loose and have been cut to size to meet customer specifi-cations. Sight gages may be ordered with either no valve, 1, 2, or 3 valves. Please refer to the customer approved drawing to determine the number of valves required.

4.6.2 Using the assembly drawings shown in Figure 4.6, verify that all parts are present and assemble the unit per the appropriate drawing. Seal all threaded pipe connections with Teflon 7 pipe sealant. Gallonage decals may be purchased as separate items and customer applied to the tank to assist in in-dication of tank gallonage. NOTE -Gallonage decals are not available for all tank sizes.

4.7 REVERSE LEVEL SIGHT GAGE

4.7.1 The component parts (except the rope) have been cut to meet Sierra Sales and customer specifications. The sight gage shall be supported at 5 ft. maximum intervals to the liquid holding tank with the support structures provided.

4.7.2 Assemble the piping loosely using Figure 4.7, the guidelines detailed below, and the customer approved tank drawing to ensure all parts are present and cut to length. As soon as all parts have been checked, assemble the parts with solvent weld cement and/ or threaded connections as shown in Figure 4.7. NOTE -Do not use solvent weld cement on the outside joints indicated in Figure 4.7. SII recommends periodic inspection of the rollers in the tee assemblies and the rope to ensure proper operation of the gage.


Figure 4.6

4.7.3 Assemble and install the support structures as shown in Figure 4.7 (without the saddle clamp cover caps and clips). Make sure the support clamp orientation is correct (with the small width of the wedge toward the top of the tank) and that the plugged support pipes are installed with the plugged end as close to the support fitting as possible. Make sure that the indicator board has been installed over the outer pipe supports as shown in Figure 4.7. Assemble and install piping as per the customer approved drawing. As piping is being installed on the tank, lock it in place with the saddle clamp cover caps and clips provided (make sure that the sealing o-ring is in the proper posi-tion as the pipe is positioned into the saddle support body). Seal all threaded pipe connections with Teflon 7 pipe sealant and connect solvent weld sockets with the correct solvent ce-ment (except the joints as noted in Figure 4.7).

4.7.4 With the inner and outer tank pipes in place, connect the rope provided to the tank float (This is accomplished by threading the rope through the center hole in the float and out one of the side holes, double knotting the rope, cutting off any excess material and pulling the rope back so the knot holds under the center hole.) and lower it into the inner pipe as shown. Thread the rope through the tee assemblies and the connecting pipe as shown. At this point the float should be at the bottom of the tank, the tee assemblies and connecting pipe should be assembled and sitting off at an angle from the outer clear 2" PVC pipe. With the rope threaded through the outer tee assembly, attach the rope to the indicator in a position parallel with the zero mark on the indicator board. (This is accomplished by threading the rope through the center hole in the indicator, double knotting the rope, checking the indicator position, adjusting as necessary and cutting and excess material protruding from the bottom of the indicator.) Put the indicator into the outer clear 2" PVC pipe while swinging the tee assemblies and connecting pipe into position. With all piping and tee assemblies installed, install the 3" PVC pipe plugs. During the tank hydrotest and first operations of the tank, check the gage for proper level indication and adjust as necessary. NOTE -This is a gallonage indicator and is not intended as an accurate measuring device.


Figure 4.7

4.8 ULTRASONIC LEVEL INDICATOR

4.8.1 Install the PE bulkhead fitting per section 3.1 for sensors with male pipe threads. Install the sensor into the fitting with Teflon ® pipe sealant. Remove the display unit box cover. Attach the display unit to the PE mounting plates provided on the tank with 4 ea. #10 S. S. Self-tapping screws. Attach the sensor cable to the control box with small strain relief and connect wires per label in the box. Attach the unit to 110 VAC and test unit. The display unit is preprogrammed for the tank ordered. The display with show hundreds of gallons (display x 100 = gallons). Refer to literature shipped with unit to answer any additional questions.

4.9 LEAK DETECTOR UNIT (FOR USE WITH SIERRA SALES CONTAINMENT TANKS ONLY)

4.9.1 The leak detector unit consists of a proximity sensor, 2 in. FPT fitting connection, 2 in. bung plug, ¾ in. strain relief, and an indicator box. Install the ¾ in. strain relief into the 2 in. bung plug. Loosely install the proximity sensor cord into the strain relief with the sensor face to the inside of the plug as sembly. Place the sensor in the interstitial space between the primary and secondary tanks approximately 1 in. above the tank bottom and securely tighten the strain relief to hold the sensor and sensor cord into position. Remove the indicator box cover. Attach the indicator box to the PE mount-ing plates provided on the tank with the 2 ea. #10 S. S. self-tapping screws. Attach the sensor cable to the control box with small strain relief and connect wires per label in the box. Connect unit to 110 VAC per label in the box using strain relief provided or other acceptable methods and test the unit. The indicator box will show a green light when power is on and the sensor is not detecting a liquid. The light is a push to test light allowing the operator to test for power outage or malfunction. If the green light goes out there are two possibilities. The green light does not come on when the button is pushed. This would indicate a lack of power to the unit or the light bulb is burned out. If the green light comes on when pushed, then a possible leak condition is indicated.

4.10 SIERRA SALES FLANGE ADAPTERS

4.10.1 Standard flange adapters are constructed from PVC or CPVC and may be purchased for solvent weld socket fittings or threaded fittings. Flange adapters for threaded fittings are provided with loose male adapter to allow the customer to adjust adapter length and flange position to match the piping at the installation. Refer to Figure 4.10 for an illustration of a flange adapter.

4.10.2 When installing the flange adapter in a solvent weld socket fitting, cut the flange adapter to desired length and solvent weld the flange adapter with the proper solvent cement in the desired position in a previously installed fitting. If the flange adapter is to be used in a threaded fitting, install the male adapter into the fitting with Teflon 7 pipe sealant, cut the flange adapter to the desired length, and solvent weld the flange adapter to the male adapter in the desired position with the proper solvent cement.


Figure 4.10

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