The Third Party Inspection for Fire Tube Boiler article provides a sample inspection and test procedure for fire tube boiler in manufacturing shop. This might be reviewd with fire tube boiler inspection and test plan.
This content guides you about all necessary stages in the production of the fire tube boilers from the examination of certification of procurement sources to the final inspection, preservation and packing to despatch to site.
You need to take this point in account this article is written for a typical Fire Tube Boiler and might not be complete for special cases.
All Fire Tube Boiler inspections and tests are carried out against the approved drawings, purchase order specifications, purchasers or company standards, and within the practices and rules of the country, state or province and any government decrees, laws, ordinance or regulation as may apply.
The applicable codes and specifications for the Fire Tube Boiler which is under construction process are:
And the applicable codes and standards are:
The applicable codes and standard may be based other international standards such as BS 2790 and etc. This content is general and can be useful if even the design code is different from ASME Code.
The list of documents
normally is agreed in the Pre-Inspection meeting which is hold several weeks
before actual commencement of inspection work. The parties which are
participated in this meeting are manufacture, purchaser and third party
inspection agency representatives.
These are the list of
documents which are normally agreed to be presented to the inspector:
The first actual inspection work in the Fire Tube Boiler is the materials inspection. Based the ASME Code providing material test reports for Fire Tube Boiler plates is mandatory, for other components only the marking inspection will be enough.
But if purchase order has mandated the MTR to be provided for all components such as tubes, nozzle pipes, fittings and etc. then the manufacture provides them as well.
As mentioned in above, the original or authenticated copies of mill certificates for plates normally are available at manufacturer's premises.
The third party inspector examines these certificates for compliance with specifications and where appropriate, drawings.
The review includes checks on:
Then inspector witnesses the plate material identification on the certificates against plate marking. It is also necessary to check with Fire Tube Boiler drawing datasheet, material list and other specification as appropriate.
The transfer identification to cut off plates also is checked.
Visual inspection for surface finish and probable defects are done and dimensional compliance with specification need also to be controlled.
When third party inspector carried out the material inspection, then provides inspection visit report, the report contains following items:
When Fire Tube Boiler material inspection carried out and result was satisfactory or non-conformities closed by remedial action, then Fire Tube Boiler manufacture will be authorised to start fabrication.
The third party Inspector checks following points on Fire Tube Boiler based on the inspection and test plan (ITP) which is already agreed between purchaser and Fire Tube Boiler manufacture.
The inspection scope is determined in ITP, some clients prefer to have stringent control and put the TPI inspector in more “hold points or witness points” in fabrication activities and some others may take lesser “hold points” and put TPI much more in the review document.
This depend to the inspection budget which client assign for inspection, much more inspection will have much more costs and less risks and conversely less more inspection will have less costs but more risks.
The fire tube boiler third party inspector checks following:
After depressurisation, boiler spaces are drained and where necessary dried.
The fire tube boiler is checked by third party inspector for completeness and dimensionally examined to ensure that all attachments/supports are in the correct orientation.
Identification marks is checked by third party inspector and information stamped using low stress type stamps on pressure parts.
The third party inspector checks the Fire tube boiler name plate and makes sure:
Surface preparation for painting is checked for the following points, according to specification by third party inspector:
It is necessary surface condition to be free from pin-holes, runs damage and other discontinuity
The third party inspector controls spares, loose items, tools and accessories and makes visual and dimensional inspection for materials, workmanship and quantity according to purchase order specification and packing list.
Marking and/or Tag is checked for identification.
Third party inspector provides Inspection Visit Report (IVR) after each visit as well as a final report summarising the activities carried out during the vessel production in accordance with the contract requirements and circulated within the time limits specified in the contract.
The report is in the format required by the client and clearly indicates final acceptance or rejection of the Fire tube boiler.
When required by the contract or purchase order a release note is issued by third party inspection agency and given to the manufacturer when the fire tube boiler have been finally accepted.
The following points are checked by the third party inspector:
The following final documents are reviewed and signed off by third party inspector:
As built, drawings if required, Manufacturer's data reports, Material certificate or certified mill test reports for all pressure parts, Material list or map, Heat treatment records (Temperature-time record chart during PWHT), NDE records, Hydrostatic test record, Hardness test record, Post weld heat treatment NDE, if specified, Name plate or other marks, Packing list and Spare parts and tool list
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