reefer ctnr - structure miscellaneous

Guidelines Web Publication

Florens Container Services

September 2006

1

Refrigerated Containers Structure Panels • For interior stainless steel panels depots are required to repair (patch) using stainless steel rivets. Welded patches will be accepted at termination, provided that the Florens’ general condition of accepting improper repairs is meet. • For exterior stainless steel panels, depots are required to repair (patch) using welded patches. Riveted patches will be accepted at termination, provided that Florens’ general condition of accepting improper repairs is met and the repair is not located on the roof. Roof patches must be welded. Note: Aluminum patches are not permitted on Stainless Steel Cladding and visa-versa. • Interior side-wall dents are not to be repaired unless cut. • Depots must differentiate when estimating patches that require foaming and those that do not. • Bare aluminum or stainless steel patches affixed to pre-painted white aluminum cladding are to be estimated for painting. • Patches that are smaller than the minimum required size will be accepted at termination, provided that Florens’ general condition of accepting improper repairs is met. 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”). • The use of steel rivets in aluminum cladding or patches is not permitted. • 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.)



September 2006

2

Refrigerated Containers Structure

Example: Bare Aluminum patch affixed to painted white aluminum cladding. Action: Repair required – paint the patch white.

Example: Steel fasteners used on aluminum patch. Action: Rectification Required. Replace fasteners and/or patch.

Patch not painted Repair is required

Aluminum patch with steel fasteners Repair is required



September 2006

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Example: Proper stainless steel patch welded to stainless steel cladding. Note: Exterior roof patches on the steel cladded units must be welded. Action: No action is required.

Example: Sheared rivets resulting from damage. The damage is for lessee account. Action: Rivets should be refastened and sealed.

Sheared rivets Repair on lessee account



September 2006

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Example: Dented interior side wall. Action: No action is required if cut is not present.

Dented but not torn panel Repair is not required



September 2006

5

Refrigerated Containers Rails Aluminum Top and Bottom Rail sections that are less than the minimum required by IICL (Must extend at least one meter from the corner casting) criteria may be considered acceptable at termination. To be considered acceptable, the section must end midway between the first and second side post and meet Florens’ general conditions of accepting improper. (Depot repairs must be in accordance with IICL criteria). Welding of aluminum top and bottom rails is not permitted. The only circumstance where welding may be accepted at termination, is when the weld is located at the splice joint and a proper splice plate has been used. In addition, Florens’ general condition for accepting improper repairs must be met. (Depot repairs must be in accordance with IICL criteria)

Example: Welded aluminum top rail splice without splice plates. Action: Rectification is required. Note: At off-hire, welded rail may be acceptable improper repair only when the weld is located at the splice joint and a proper splice plate has been used. In addition, Florens’ general condition of accepting improper repairs must been met. (Depot repairs must be in accordance with IICL criteria)

Spliced repair with plate Repair is required



September 2006

6

Refrigerated Containers Roof Sheet Flange

Example: Damage to roof sheet flange in the area adjacent to the header extension plate. Action: If not cracked or rivets are not missing, no action. Separated roof sheets require no action beyond sealing to prevent water ingress.



September 2006

7

Refrigerated Containers Rails

Example: Welded aluminum rail. Action: Rectification is required.

Example: Damaged aluminum bottom rail below the rivet line. Action: Repair by smoothing and caulking the damaged area.

Welded aluminum rail—Repair is required



September 2006

8

Refrigerated Containers Rails

Example: Cut aluminum bottom rail upper flange. Action: Damage meets requirement to stopdrill and doubler plate reinforcement.

Cleaning Unless directed otherwise by Florens (certain reposition moves), all off-hired reefers require interior steam cleaning. On customer account



September 2006

9

Refrigerated Containers Addendum January 2004

Rails

Lower Web and Flange Damage Criteria on Bottom Rail:

Cuts, gouges, bends or breakage in the lower web and flange of the bottom rail may be repaired by installing doubler plate over the damaged area. The doubler plate must be installed after first straightening the damaged rail without heat, and then drilling stop holes at both ends of the crack. This repair method may only be used under the following conditions:

• The area of damage may not extend above the lower edge of the rail by more than 80 mm (3-1/8 in). • The area of damage must not exceed 600 mm (24 in) in length.

All other provisions shown on the current IICL manual continue to apply.

Example: Damaged rail is repaired by Example: The Rail is holed behind T-Clip. doubler plate. Action: No action is required if the above Action: No action is required if the damage: criteria is met. If this type of repair exists • Does not extend above the lower edge by at off hire, it is acceptable repair. more than 80 mm (3-1/8 in) • Area does not exceed 600 mm (24 in) in length.

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September 2006

10

Refrigerated Containers Miscellaneous • Interior drain plugs and chains are not to be replaced. • If damaged, Door tie-backs must be replaced. • Refurbishment of door frames, sills and headers is only required when the sealing of the door has been compromised. Special approval from Florens is required. • If necessary, missing or loose interior sealant is only replaced at the lower panel / rail cove horizontal joint or to correct an improper repair. • Missing, damaged or worn kazoos and drain tubes must be repaired / replaced. Hairline cracks at the T- floor threshold are to be corrected only if the structural integrity is compromised

Example: An example of interior sealant at a vertical joint coming loose. Action: No repair is required.

Vertical sealant loose No repair is required



September 2006

11

Refrigerated Containers Miscellaneous

Example: Missing drain tube and kazoo. Action: Replace on lessee account.

Example: Missing interior drain plug and chains. Action: No action is required.

Missing plug and chain Repair is not required



September 2006

12

Refrigerated Containers Miscellaneous Repairs on corrugated sub-floor Example of a typical Steel floor

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Example: Sub-floor cut, torn or cracked (damage not shown) Action: Repair using overlay riveted patches



September 2006

13

Refrigerated Containers Miscellaneous Repairs on corrugated sub-floor

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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 overlapping a riveted patch. Welded patches are acceptable at off hire. Note: Cut, torn, or cracked sub-floor require repair



September 2006

14

Panel Delamination in Refrigerated Containers (Reefers) Panel delamination on any area of the reefer container is defined as a separation of the insula-tion core from inner lining of the metal cladding. It can be caused by impact damage or due to defects in the manufacturing process. It is important to distinguish the cause of delamina-tion as this will allow correct allocation to responsible party when rectifying this damage. As a general guide, delamination due to damage results from foam insulation being sheared behind the bond line, leaving residue of the insulation on the cladding which is exposed to premature aging. This damage requires repair. While delamination due to defects, results in the insulation skin being separated from the metal cladding. The insulation ‘skin’ remains intact, therefore does not cause premature aging. Depending on the location, size of the de-laminated area, and the design of the container, delamination bolts should be used. These bolts should be used in a Sandwich Construction where insulated panels contribute a signifi-cant portion of panel strength without embedded posts or stringers. Regardless of the cause of delamination, repair is not required on the following areas of the container:

• Roof Exterior Panel (exterior cladding) • Side wall exterior sheet and post design. (sheet riveted to side posts) • Sub floor • “T” floor • Door exterior

Delamination that is not a result of impact damage must be repaired under the following criteria: Exterior Side wall: Over 40% of the total panel area is delaminated. Panel with no posts or panel glued to side posts at 1250 mm centers. Delamination bolts must be used. Interior Side wall: Use delamination bolts in all cases where the delamination is over 40% of the area of the panel. Interior Roof: Repair is required when 30% of the panel area is delaminated. Use rivets when the stringer glued centers are at 1050mm. Interior Door: Repair is required when one area exceeds 50% of the lining area. Use delami-nation bolts to repair interior door delamination. NOTE: INJECTION OF ADHESIVE FOR DELAMINATION REPAIR IS NOT AL-LOWED.



September 2006

15

Panel Delamination in Refrigerated Containers (Reefers) 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 Alu-minum.

Installation Instructions: 1) Make sure the container is level. Check / match diagonals. 2) 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 corru-gation.

3) Using jacks, position the cladding back tightly against the insulation be-fore drilling the holes.

4) After drilling holes, coat each hole using a spray food grade polyurethane clear coating. This coating prevents galvanic reaction, so it is very important.

5) Before installing the bolt, apply caulking underneath the head of the aluminum nut. 6) Install the bolts starting from the center of the panel working out to the ends. Bolt torque is 20ft

lbs (0.86m.kgs). 7) Cut of the excess permaglas rod. Affix rivets and seal with Sikaflex 221 or equivalent. Note: Florens requires 5 tight bolts per 4 feet 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 inte-rior lining.



September 2006

16

Panel Delamination in Refrigerated Containers (Reefers)

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.

Example of caulk applied underneath the head of the nut and installed rivets. Before installing the delamination bolt, spray with food grade polyurethane to re-duce galvanic reaction.

Delamination bolt affixed to the interior recessed area.



September 2006

17

Panel Delamination in Refrigerated Containers (Reefers) Placement of Tie bolts Florens requires installation of 5 tie bolts for each 4’ 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’ below the top rail with each bolt 1’ apart from the left and right edge of the panel. • Secure two bolts 2’ above the edge of the bottom rail with each bolt 1’ apart from the left and right edge of the panel.

Placement of tie bolts

reefer ctnr - structure miscellaneous

Documents

aluminum patches

stainless steel patches

stainless steel rivets

patch repairs

welded patches

stainless steel cladding

steel fasteners repair

proper stainless steel