Inspection fastening

Fully Adhered. The substrate, ie, insulation, cover board, etc, that the single-ply membrane is to be attached to is either fuUy adhered or mechanically fastened to the deck. However, there are also appHcations where the membrane is adhered directly to the deck. The membrane is then adhered to the substrate. The typical method for adhering the membrane to the substrate is by applying a contact adhesive to the membrane and substrate, rolling the membrane into place, and brooming once the adhesive is ready. There are one-sided appHcations where the membrane is roUed directly into the adhesive that has been appHed to the substrate only. The membrane used in this appHcation method may be fleece-backed. FuUy adhered systems can be installed on any slope. The fuUy adhered appHcation offers a smooth surface that is easy to maintain and inspect, as weU as exceUent wind resistance on account of positive attachment. 

Local repair of delamination originally caused by non-durable surface treatment is only temporarily successful at best. The surface treatment on the unrepaired portion of the assembly remains susceptible to attack and the area of delamination will likely continue to grow once the assembly is put back into service and exposed to moist conditions. Replacement or complete remanufacture of the component is the only way to permanently address this type of damage. However, time-limited repairs using bonded or mechanical methods can be used to extend the life of the component until a major overhaul is scheduled. In some cases such as widespread disbond of fuselage doublers, mechanical repairs (rivets and fastened doublers) and continued inspection are used to extend the life of the skin indefinitely because of the high cost of replacement. 

Failure Investigation. The clamp was nonmagnetic and the stamped identification on the side of the U-shaped shells indicated that they were fabricated from forged 304 austenitic stainless steel. Visual examination of the fracture surfaces revealed they were entirely brittle and exhibited a very coarse fracture morphology. Liquid penetrant inspection revealed the presence of additional cracks in the fractured half of the clamp. There was no cracking present in the high-strength steel fasteners. 

Mechanical Seal Gland Fasteners Inspection Required for Castings ... 

Very small items produced and tested at very high rates (e.g., fasteners, microcircirit chips) can be handled by vibratory bowl feeders, slides, and small conveyors to ensure that they are correctly presented to the inspection device. These systems often have automated disposal mechanisms built in to gate any defective items along a different track from the good items, an example of a materials-handling component equivalent to the human Response function. 

Transit systems in Chicago, Jersey City, New York City, Washington, DC, San Francisco, and Los Angeles were subjected to inspection, and it was found that corrosion-related problems exist, as manifested by the accelerated corrosion of the insulators of the rail fasteners in Jersey City and New York City, or in the wooden tie spikes in Chicago. For instance, wooden tie spikes need to be replaced after 6 months instead of the anticipated 25 years. In many instances, there was no formal tracking of corrosion-related costs. 

The LOTO procedure must contain clear instructions covering procedures for re-energizing machines and equipment after completion of maintenance or repairs. The equipment must be inspected to verify that components are properly fastened and jumpers or grounds, if applied, are removed. Employees performing the procedure must be safely positioned before removing the LOTO devices. Affected employees not participating in the procedure must be notified that the devices have been removed. 

The general attitude of the inspection group will be that of the good sailor who ensures that any object on board a ship is securely fastened before confronting rough seas. 

Difference in linear expansions coefficients of guiding channels of the assembly and reactor core barrel is compensated by increase of the working stroke of spring block of FA cap. For connection/disconnection of AFA stainless cap and GC a simple device is used not requiring replaceable fasteners or complicated fixtures with power nut drivers. As the inspection stand is available the procedure on dismounting or mounting the AFA cap takes a minimum time. 

Inspect ladders regularly and before use for cracks, wear, sway, breaks, bends, and other kinds of damage. Examine extension locks, bolts, fasteners, and feet for defects or looseness. Remove defective ladders from service until properly repaired. Destroy and replace unrepairable ladders. 

Even though adhesively bonded composite joints have a number of advantages over conventional mechanical fastening, they have some drawbacks too. Adhesively bonded joint is a permanent joint and it can t be disassembled for maintenance and damage inspection. Therefore, it is highly essential to monitor the state of the joint throughout its service life in order to prevent drastic failures, to optimize use of the structure which also identifies the scope of future product development and improvements. 

Shift. For each shift inspection, the means used to secure/attach the equipment to the vessel/flotation device is in proper condition, including wear, corrosion, loose or missing fasteners, defective welds, and (when applicable) insufficient tension. 

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