Transcript
TOPS – Technical Guidelines
Edition 2
Refrigerated Containers Structure Panels •
For interior stainless steel panels, Florens depots are required to repair (patch) using stainless steel rivets. Welded patches will be accepted at off-hire, provided that the repair is in good condition and good workmanship.
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Existing interior MGSS patches, without any signs of corrosion or staining, should be left alone, provided that the repair is in good condition and good workmanship.
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For exterior stainless steel panels, Florens depots are required to repair (patch) using welded patches. Riveted patches will be accepted at off-hire, provided that the repair is in good condition and good workmanship and the repair is not located on the roof. Roof patches must be welded.
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Aluminum patches and fasteners are not permitted on Stainless Steel Panels and vice-versa.
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Interior side-wall dents are not to be repaired unless cut. The damage also must not violate any other regulation.
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Depots must differentiate when estimating patches that require foaming and those that do not.
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Unpainted patches affixed to pre-painted panels, are to be estimated for painting.
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Riveted patches that are smaller than the minimum required size will be accepted at termination. The patch must be watertight and able to accommodate a minimum of 4 fasteners. Depots are required to use patches with a minimum dimension of 6”X6” (15cm x 15cm).
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The rivet pattern on patch repairs requires a minimum distance between rivets of 2” (50mm) on center. Depots are required to conform to the stated IICL criteria of 1” (25mm) on center.
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TOPS – Technical Guidelines
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Example: Proper stainless steel patch welded to exterior side panel. Action: No action is required.
Example: Existing riveted patches on exterior MGSS side panels are acceptable at off-hire. Action: No action is required. Note: Exterior roof patches on steel panels must be welded.
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Example: MGSS patch on interior door panel. Action: No action is required. Existing interior MGSS patches, without any signs of corrosion or staining, should be left alone, provided that the repair is good in condition and good workmanship.
Example: Dented interior panel, but not cut. Action: No action is required.
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TOPS – Technical Guidelines
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Panel Delamination in Refrigerated Containers (Reefers) Panel delamination on any area of the reefer container is defined as a separation of the insulation from the panel surface. It can be caused by impact damage or due to defects in the manufacturing process. It is important to distinguish the cause of delamination as this will allow the correct allocation to responsibility. As a general guide, delamination due to damages results from foam insulation being sheared from the panel. Typical delamination due to damage show residues of the insulation adhered to the panel, which is exposed to premature aging. This damage requires repair when outside of IICL limitations (3 sqm.). Delamination due to defects results in separation of insulation from the panel in the area where the adhesion primer is applied. On typical delamination due to defects, the insulation core remains intact. Various methods are available to correct delamination. These methods include the use of mechanical fasteners, delamination bolts and sectioning of the panel and renewal of foam. (Delamination bolts are only to be used to repair delamination due to defects and only when directly instructed by Florens). The use of these methods can vary depending on the location of the delamination, size of the delaminated area and the design of the container. If necessary, please consult with your local Florens Technical Representative for guidance. Regardless of the cause of delamination, repair is not required on the following areas of the container: • Roof Exterior Panel (exterior cladding) • Sub floor • “T” floor • Door exterior NOTE: INJECTION OF ADHESIVE FOR DELAMINATION REPAIR IS NOT ALLOWED. Installation of Delamination bolt:
Delamination Bolt: Cap Nut with Permaglas Rod 100 mm. Cap nut is made of Stainless Steel (SuS). Rod Nut is made of Aluminum. Page 4 of 11
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Installation Instructions: • • • • • • • •
Make sure the container is level. Check / match diagonals. Using a template mark the location of the bolt on the interior lining of the container. It is important to install bolts on the recessed area of the corrugation. Using jacks, position the cladding back tightly against the insulation before drilling the holes. After drilling holes, coat each hole using a spray food grade polyurethane clear coating. This coating prevents galvanic reaction, so it is very important. Before installing the bolt, apply caulking underneath the head of the aluminum nut. Install the bolts starting from the center of the panel working out to the ends. Bolt torque is 20ft lbs (0.86m.kgs). Cut of the excess permaglas rod. Affix rivets and seal with Sikaflex 221 or equivalent.
Note: Florens requires 5 tight bolts per 4 feet (120cm) wide panel with one tight bolt in the center of the panel and Note: Side panel bolts are installed from outside to the inside, i.e. the nutsert is installed on the interior lining.
Example of Delamination bolt on side panel. Delamination should not be repaired for: • Roof Exterior Panel (exterior cladding), • Side wall exterior sheet and post. (sheet riveted to side posts), • Sub floor, “T” floor, Door exterior.
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Edition 2
Example of caulk applied underneath the head of the nut and installed rivets. Before installing the delamination bolt, spray with food grade polyurethane to reduce galvanic reaction.
Placement of Tie bolts Florens requires installation of 5 tie bolts for each 4’ (120cm) wide panel. The placement of the tie bolts should be as follows: • Secure one bolt directly in the center of the panel. • Secure two bolts 2’ (60cm) below the top rail with each bolt 1’ (30cm) apart from the left and right edge of the panel. • Secure two bolts 2’ (60cm) above the edge of the bottom rail with each bolt 1’ (30cm) apart from the left and right edge of the panel
Delamination bolts are only to be used for delamination due to defects. They are not to be used for delamination due to damage. Estimating the use of delamination bolts should only be done when specifically requested by Florens.
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Repairs on corrugated sub-floor
Example of a typical steel corrugated sub-floor
Example: Sub-floor cut, torn or cracked Action: Damaged to be repaired using overlapping riveted patch.
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Example: Dent on the sub-floor. Action: Dents do not require repair if not resulting in cut, tear or crack. For damages requiring repair of the sub-floor, repair by an overlapping riveted patch. Welded patches are acceptable at off hire.
Example: Welded repair to sub-floor. Action: Repair not required. Repairs to sub-floor cuts, tears and cracks, should be repaired with an overlay riveted patch. Welded patches will be accepted at off-hire, provided the repair is in good condition and good workmanship.
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Cleaning •
Unless directed otherwise by Florens (certain reposition moves), all off-hired reefers require interior steam cleaning.
Miscellaneous •
If damaged or missing, door tie-backs must be replaced.
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Missing or loose interior sealant should only be replaced at the lower panel / rail cove horizontal seam.
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Hairline cracks at the T- floor threshold are to be corrected only if the structural integrity is compromised.
Example: Loose caulking. Action: No action required. Missing or loose interior sealant is only replaced at the lower panel / rail cove horizontal seam.
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Kazoo
Example: Missing kazoo (No sign of wear) Action: Replacement to User
Example: Worn out kazoo without any sign of impact. Action: Replacement to Owner
Drain Plugs Missing drain plugs and chains, do not require replacement
T-Floor Page 10 of 11
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Edition 2
Florens will accept reinforcement plates welded at the top of the T-bars when installed to provide additional support to T-bar inserts, provided the following requirements are met; • • • •
The length of the reinforcement plates should be between 2” (5cm) and 3” (7.5cm). The distance between two reinforcement plates in the same T-bar channel, should be at least 6” (15cm). The reinforcement plate should be fully welded at both sides and completely flush and level with the adjacent T-bars. No jagged edges are allowed and reinforcement plate must not protrude above the plane of the upper T-bar.
Min 6” (30cm)
Example: Reinforcement plate welded at the top of T-bars. Action: No action is required if the repair meets all of the above criteria.
Example: Two reinforcement plates welded on the same T-bar channel. Action: No action is required if the distance between The plates is more than 6” (15cm) and the repair meets all the above criteria.
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