From Philadelphia, Serving the World With Polyethylene tanks SIERRA 215-258-5602

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


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5. TANK ACCESSORIES

5.1 LATERAL RESTRAINT SYSTEM (FLAT BOTTOM TANKS)

5.1.1 The lateral restraint system is designed for tank position restraint on a concrete pad inside of an en-closed building. It is not designed for wind or seismic restraint capabilities. Using the assembly drawing and table shown in Figure 5.1, verify that all parts are present.

5.1.2 Locate the tank on the concrete pad as desired. The pad required for the restraint system must be 18-3/ 4" larger in diameter than the tank diameter for proper application of 1/ 2" adhesive anchor bolts (assumes 6-3/ 8" edge distance required). Lay out the bands around the tank (alternate long bands and short bands if both lengths are provided) with the studs and angle ends sticking out away from the tank. Fasten the bands together with the 3/ 8" -16 x 4" hex head bolts as shown in the drawing. Raise the bands 17" and loosely install the anchor clips using the 1/ 2" -13 hex nuts and 1/ 2" washers provided. Tighten the 3/ 8" -16 x 4" hex head bolts to remove band looseness. Mark the slot locations of the anchor clips, remove the clips, and install the required number of 1/ 2" anchor bolts. Anchor bolts are not provided by the manufacturer and must be purchased by the customer.



Figure 5.1

5.1.3 Replace the anchor clips and secure the clips to both bands and the concrete pad. Do not over tighten the bands to the tank. The band tension should only remove looseness and not cause any tank deflection.

5.2 WIND/ SEISMIC TANK RESTRAINT SYSTEM (FLAT BOTTOM TANKS)


Figure 5.2

5.2.1 The wind/ seismic tank restraint system is designed for tank restraint on an appropriate concrete pad under 110 MPH wind or seismic zone 4 conditions. Using the assembly drawing and table shown in Figure 5.2, verify that all parts are present.

5.2.2 Locate the tank on the concrete pad as desired. Lay out all anchors required (4 or 8) equally spaced, (4 anchors must be directly below the tank tie down locations). Make sure all anchors are located next to the tank with the 2 ea. eye bolt holes of the anchor on top of the weldment and the plate face of the anchor weldment located next to the tank. Mark all the anchor bolt locations, remove the anchors and install the required Hilti adhesive model HVA anchor bolts as specified by the assembly drawing and the SII seismic restraint drawings B-2686A through B-2688A. These anchor bolts are not provided by the manufacturer and must be purchased by the customer.

5.2.3 Replace the anchors and secure the anchors to the concrete. Install the 3/ 4" eyebolts loosely as shown by the drawing. Fasten the tank to the concrete pad with the required cable (make sure the cable sheath is on the cable and located around the lug locations) as shown by the assembly drawing utilizing the cable thimbles and clamps provided. Tension the cable before filling the tank to remove cable looseness. Do not over-tension the cables as this may cause tank damage. The cable tension will change with tank loading and temperature changes -DO NOT re-tension the cables.


Figure 5.2

5.3 WIND/ SEISMIC TANK RESTRAINT SYSTEM (CONE BOTTOM TANKS)

5.3.1 The wind/ seismic tank restraint system is designed for cone bottom tank restraint on an appropriate concrete pad under 110 MPH wind or seismic zone 4 conditions using a SIERRA SALES cone stand for proper tank support. Using the assembly drawing and table shown in Figure 5.3, verify that all parts are present.



Figure 5.3
(click the chart for a larger view)


5.3.2 Locate the tank and stand on the concrete pad as desired. The pad required for the restraint system must be 24" larger in diameter than the tank diameter for proper application of 3/ 4" adhesive anchor bolts (assumes 10" edge distance required. Lay out the four anchors provided directly below the tank tie down locations. Make sure all anchors are located so the hole in the anchor aligns with the tank wall. Mark all the anchor bolt locations (stand and anchor positions), remove the stand and anchors and install the required Hilti adhesive model HVA anchor bolts as specified by the assembly drawing and the SIERRA SALES seismic restraint drawing B-3182. These anchor bolts are not provided by the manufacturer and must be purchased by the customer.

5.3.3 Replace the stand and anchors and secure to the concrete pad. Install the 3/ 4" eyebolts loosely as shown by the drawing. Fasten the tank to the concrete pad with the required cable (make sure the cable sheath is on the cable and located around the lug locations) as shown by the assembly drawing utilizing the cable thimbles and clamps provided. Tension the cable before filling the tank to remove cable looseness. Do not over-tension the cables as this may cause tank damage. The cable tension will change with tank loading and temperature changes -DO NOT re-tension the cables.

5.4 SIERRA SALES STEEL LADDERS

5.4.1 Steel ladders are designed in accordance with OSHA 1910.27 and are to be mounted next to the tank on a concrete pad at the same elevation as the bottom of the tank. The concrete pad area that the ladder mounts to must be of sufficient size as to comply with OSHA standards regarding proper access to and from the ladder. This should be determined by the construction site engineer based on the specific application. The pad must be of sufficient size to allow proper attachment of 1/ 4" an chor bolts (check with anchor bolt manufacturer for embedment and edge distance required). The ladder mounting system is designed to allow for tank expansion and contraction due to temperature and loading changes. Using the assembly drawing and table shown in Figure 5.4, verify that all parts are present and assemble accordingly. NOTE: This ladder is provided for tank inspection only. At no time should the operator step off this ladder onto the tank unless stepping onto an approved work platform with guard rails or utilizing some other approved safety device. Proper safety equipment (i. e. guard rails, safety harness, etc.) must be used to step onto the tank. Consult applicable regulations to determine proper equipment for other than inspection work.

5.4.2 Attach the two pivoting attachment arms to the ladder using 1 ea. 1/2"-13 x 2" hex head bolt and 2 ea. 1/ 2" -13 hex nuts. Double nut each bolt by tightening the first nut to 85 ft. -lbs. of torque and then jamming the second nut to the first nut by holding the first nut and tightening the second to 85 ft. -lbs. of torque. Position the ladder on the tank and attach the top pivoting attachment arms to the tank with the ladder attachment tube and cotter pin provided (see Figure 5.4). Position the ladder parallel with the side of the tank and mark the 1/ 4" anchor bolt locations. Install appropriate 1/ 4" anchor bolts and attach the bottom of the ladder to the concrete pad. Anchor bolts are not provided by the manufacturer and must be purchased by the customer.

5.5 STEEL LADDER CAGES

5.5.1 Using the assembly drawing shown in Figure 5.5 and the instructions in section 5.5.2, verify that all parts are present and assemble accordingly. These cages are designed for use only with the SII steel ladder design. Cages are required for ladders used to ascend to heights exceeding 20 ft. NOTE: Assembly is easier if the cages are installed on the ladder before the ladder installation to the tank.

5.5.2 Install the cages loosely using the u-bolts provided starting with the top cage unit (4 ft. unit with a lar-ger bolt pattern). The bottom cage unit must have a larger diameter at the bottom than at the top of the unit and the bottom edge of the unit be located a minimum of 7 feet and a maximum of 8 feet above the ground. When the cage units have been properly located and spaced evenly, tighten the u-bolts securely.




Figure 5.4



Figure 5.5

5.6 FRP LADDERS (up to 300" height)

5.6.1 FRP ladders are designed in accordance with OSHA 1910.27 and are to be mounted next to the tank on a concrete pad at the same elevation as the bottom of the tank. The concrete pad area that the ladder mounts to must be of sufficient size as to comply with OSHA standards regarding proper access to and from the ladder. This should be determined by the construction site engineer based on the specific application. The pad must be of sufficient size to allow proper attachment of 5/ 8" anchor bolts (check with anchor bolt manufacture for embedment and edge distance required). The ladder mounting system is designed to allow for tank expansion and contraction due to temperature and loading changes. Using the assembly drawing and table shown in Figure 5.6, verify that all parts are present and assemble accordingly. NOTE: This ladder is provided for tank inspection only. At no time should the operator step off this ladder onto the tank unless stepping onto an approved work platform with guard rails or utilizing some other approved safety device. Proper safety equipment (i. e. guard rails, safety harness, etc.) must be used to step onto the tank. Consult applicable regulations to determine proper safety equipment.

5.6.2 Attach the stainless steel top pivoting attachment arms to the ladder using the 1/ 2" bolt and 3/ 4" bushing assemblies (2 required) as shown in Figure 5.6. Position the ladder on the tank and attach the top pivoting attachment arms to the tank with the ladder attachment tube and cotter keys provided (see assembly drawing). Position the ladder parallel with the side of the tank and mark 4 ea. 5/ 8" anchor bolt locations. Install appropriate 5/ 8" anchor bolts and attach the bottom of the ladder to the concrete pad. Anchor bolts are not provided by the manufacturer and must be purchased by the customer.




Figure 5.6

5.7 FRP LADDER CAGES

5.7.1 Using the assembly drawing shown in Figure 5.7 and the instructions in section 5.7.2, verify that the correct number of fasteners have been shipped to attach the FRP cage unit. These cages are designed for use only with the SIERRA SALES FRP ladder design. Cages are required for ladders used to ascend to heights exceeding 20 ft. NOTE: Assembly is easier if the cage unit is installed on the ladder before ladder installation.

5.7.2 Position the cage unit on the ladder with the flared end toward the ladder base. Attach the cage to the ladder using the 3/ 8" stainless steel bolts provided (4 bolt assemblies per cage hoop).



Figure 5.7

5.8 HORIZONTAL LEG TANK SKIDS


Figure 5.8

5.8.1 Horizontal leg tank skids are designed to provide adequate support for horizontal leg tanks (750-1685 gallons) and a structural support frame which provides easy attachment for a variety of stationary applications. The hoop pipe restraints restrain the leg tank and give it additional structural support. Hoop restraints are available for tanks 525 gallons and larger. Hoops are required on tank sizes above 730 gallons. The use of a skid is not required, but it is important to have proper sup port under all of the tank support areas (points which would contact the ground if the tank was sitting on level ground). Use the assembly drawing shown in Figure 5.8 to assist in part identification and assembly.

5.8.2 Position the skid provided in the desired location and attach as necessary for the application. Position the tank on the skid with the legs centered over the hoop mounting holes in the top of the skid.

5.8.3 With one person on each side of the tank, insert J-bolts into the hoop holes and lift the hoop into po-sition directly above the tank legs. Spread the hoop slightly while sliding the hoop (centered in the pipe guide channel formed into the tank legs) onto the tank. Insert the J-bolts into the proper holes in the top of the skid. Install the bevel washer, lock washer, and hex nut on each of the J-bolts loosely. Do not tighten the hex nuts yet. See view A-A shown in Figure 5.8 for an illustration of the loosely assembled J-bolt/ hoop assembly.

5.8.4 Repeat the procedure as detailed in section 5.8.3 for each of the remaining hoops required. When all hoops have been loosely installed, check the tank and hoop alignment to make sure the placement is correct. When proper alignment has been established, start tightening the hex nuts on each hoop. Tighten both sides of the hoop equally until the top of the hoop is tight all the way around the top of the tank and proper tension is obtained. Proceed to the next hoop and repeat the tightening procedure until all of the hoops have proper tension. Recheck the hoop tension after the tank has been filled. Tighten the hoops as necessary until the top of the hoop is tight all the way around the top of the tank.

5.9 Item Deleted.
5.10 Item Deleted.
5.11 CONE BOTTOM TANK STANDS

5.11.1 Cone bottom tank stands are designed specifically for use with SII cone bottom tanks (500 to 13,000 gallons) to provide support necessary for proper tank operation. The stands are provided as one piece welded units for minimal assembly requirements.

5.11.2 Position the cone stand provided in the desired location on a properly designed concrete pad. Stand mounting holes have been provided to secure the structure as required depending upon the tank application. (Consult site engineer for anchoring requirements.) Position the tank in the stand and complete the tank installation as necessary.

5.12 CONE BOTTOM TANK STAND EXTENSIONS

5.12.1 Cone bottom tank stand extensions are designed specifically for use with SII cone bottom tank stands. Cone bottom tank stands equipped with extensions are not approved for seismic restraint applications. The extensions are provided in 20" and 40" welded units and are used to increase cone bottom tank clearance 20" or 40".

5.12.2 Install the extensions onto the cone stand legs with the bolt assemblies provided. Tighten bolts to 300 ft.-lbs of torque. With the extensions in place, proceed with the cone stand installation as previously described.

5.13 HEATED TANKS

5.13.1 Heated tanks are insulated with a minimum of 2" of 2-3 lb./ ft. 3 polyurethane foam material with an "R" valve of 8.33/ in. The insulation is sealed with 2 coats of acrylic latex mastic. Although this appears to be a tough, resilient covering, it can be easily torn or broken if the tank is not properly transported. Use only carpeted and padded equipment to move an insulated tank. Do not alow the tank to drop or roll on rough surface as this may damage the insulation.

5.13.2 Heated tanks are equipped with at least 1 control box with maintenance temperature and over-limit temperature settings. The maintenance temperature setting should be set at the desired maintenance temperature. The over-limit temperature setting should be adjusted to 10 degrees above the desired maintenance temperature. The maximum temperature the over-limit control should be set to is 140° F for crosslinked polyethylene tanks and 130° F for high density linear polyethylene tanks. sure to check tank material type and design before setting any control temperatures over 100° F. It is best to keep the tank at the lowest temperature necessary to accomplish the desired objec tive. The Figure 5.11 on the next page shows a standard 110 VAC control box front cover with the control functions shown. This control box has calibration functions for the temperature probes. The control box is factory calibrated and should not need recalibrated. If there are any questions about control box calibration, consult the factory. Figure 5.12 shows a schematic of the terminal connections possible located under the control box front cover. The terminals available for customer connection are: line in, over-limit alarm relay, and low-limit alarm relay. There are other control boxes available with different functions not detailed in these instructions. Please consult the factory with questions regarding other types of control boxes available. Refer to the control box instructions and schematics sent with each tank for further details. Download the Heat Trace System Manual (PDF Format).


Figure 5.11


Figure 5.12

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