Above Ground Storage Tank Inspection
The Above Ground Storage Tank Inspection provides you with information about the inspection of storage tanks and storage tank testing in a construction shop and site, as well as storage tank in-service inspection in operating units. You may review storage tank inspection procedure and storage tank ITP articles.
What are the Above Ground Storage Tank Inspection Requirements in the Manufacturer Shop and at the field?
The construction code for the atmospheric storage tank is API STD 650, and for a low pressure storage tank is API STD 620. These cover the minimum requirements for design, materials, fabrication, inspection and testing.
With the above explanation, your inspection and test plan (ITP) for storage tank construction needs to meet the requirements of either API STD 650 or API 620.
The storage tank inspection and test plan summarize all inspection requirements in several pages and in tabular format.
The storage tank inspection and test plan is prepared in two sections, one for the supply, cutting, rolling and beveling of storage tank plates in the manufacturer’s shop, and the other section for construction activities in the field.
The prepared plates in the shop are transferred to the field for assembly. Depending on the client’s contract, sometimes there is only one contractor for shop and field activities, and sometimes there are two contractors one for the shop and one for field assembly.
This table determines each party’s responsibility (i.e. construction contractor, third party inspector and client).
For more detailed information on above ground storage tank inspection both on in-shop and on-site review the following articles:
Third Party Inspection for Storage Tank- Fabrication Inspection
When the storage tank material inspection carried out and result was satisfactory or non-conformities closed by remedial action, then storage tank manufacture will be authorised to start fabrication.
The inspection scope is determined in ITP, some clients prefer to have stringent control and put the TPI inspector in more “hold 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.
Third party Inspector is pays attention to the following points on a basis to be outlined in the purchaser’s documentation, quality plan, test and inspection plan, or other document, as notified to the inspector.