Repair Procedures

Regardless of the amount of NDE applied no ship will last forever. Only when the costs of maintaining a vessel to the condition required by Class become unacceptable will a ship be scrapped. Through the more rigorous applicaton of NDE and the stringent imposition of repair procedures it is possible that the dangers posed by an aging fleet can be reduced. 

When both components of a threaded joint are of weldable metal, the joint may be seal-welded as shown in Fig. 10-130. Seal welds may be used only to prevent leakage of threaded joints. They are not considered as contributing any strength to the joint. This type of joint is limited to new construction and is not suitable as a repair procedure, since pipe dope in the threads would interfere with welding. This method provides tight joints with a minimum of welding labor. When threaded joints used to join materials with widely dinerent coeffi-... 

Cautions. Precise determination of the cause of weld-root cracks can be difficult. Determining correct repair procedures and preventive measures may require metallographic examinations and analyses. 

Designers must keep in mind that modem aircraft will likely be in service for thirty years and that repair of adhesive bonded structure will be inevitable. They must allow for reasonable disassembly of bonded stmcture for repair access as well as anticipate repair procedures that will not be unduly difficult for airline repair stations. 

Specify the various repair procedures, how they should be produced, selected, and implemented. 

Periodic maintenance, recoating Service conditions temperature limits, chemical exposure limits Repair procedures... 

Repair procedures shall be in accordance with the requirements of para. GR-5.5. Testing and examination of repairs shall be in accordance with the requirements of para. GR-5.10. 

When specified, casting repair procedures shall be submitted for purchaser s approval... 

Shall casting repair procedures be submitted to the purchaser for approval Yes No... 

A550 Casting repair procedure approval CAS REP PR c 1 1 lyes (true) Oi no (false)... 

If specified, for casting repairs made in the vendor s shop, repair procedures including weld maps... 

A highly relevant question is whether the goal should be to operate at the level of the single component or not. In order to minimize the risk of device failure the incorporation of some redundancy or repair procedures appears unavoidable, as in biological processes, so that it will be necessary to develop suitable addressing and detection procedures, error-checking and self-healing mechanisms for multidevice arrays. 

With annuloplasty procedures heparin and endocarditis prophylaxis should be administered before the procedures. When the edge-to-edge technique is performed, heparin should not be administered until the transseptal puncture has been performed. Regular follow-up examination, anticoagulation, and endocarditis prophylaxis are recommended after mitral repair procedures. 

Fortunately, the lid was restrained by a short length of stout chain and did not rocket away. A loud report and a swish was heard as the compressed air was harmlessly released. If this unorthodox repair had been performed on a system containing a hazardous chemical, surely there would have been a lot more unwelcome problems. Good mechanical integrity training and adherence to well-written repair procedures can help prevent this type of predicament. 

The Role of Mechanical Integrity in Chemical Process Safety 233 Safety Relief Valve Testing and Repair Procedures... 

Undesirable side effects may also be the result of modifications made in preparation for maintenance and/or activities in the implementation of maintenance. Some of these situations, previously discussed in Chapter 4 and Chapter 5, require more effort than the isolated projects. A system to review work orders and the preparation for maintenance requires continued diligence. Well-publicized, up-to-date mechanical and instrument specifications and written repair procedures which include lists of blinds will reduce many misunderstandings and incidents. 

Safety Relief Valve Testing and Repair Procedures... 

The prevailing opinion was that stress corrosion should occur in atmospheric storage tanks [1278]. Therefore, it was somewhat surprising when cases of stress corrosion in atmospheric ammonia tanks were reported [1279]-[1281], Descriptions of further incidents, inspection techniques, and repair procedures can be found in [1276], [1282]-[1289], [1290],... 

In general, the earlier the intervention, the more successful the pupil repair procedure. If no vitreous is foimd in the... 

The same routine inspection and repair procedures as practiced in maintaining digester linings should also be used in this associated equipment. Similar lining problems can occur in this equipment and the remedies are the same as in the digester. 

Casing Fasteners 0 Casting Repair Procedure Approval Required ... 

A compilation of standard maintenance repair procedures to be used on work orders for specific jobs. The sequence of job step activities, labor requirements, parts, and materials required are listed, along with special permitting and safety requirements. 

Serves as a valuable guide to work order planning for larger jobs and is updeited whenever a standard repair procedure is changed or created. 

Repair Manual (SRM) is a set of repair data for common damage events. It is provided by the OEM at airplane delivery and approved by the relevant regulatory authority. It will indicate limitations and provide repair scheme designs if damage is within these limits. The repair procedures are generally as follows ... 

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