Third Party Inspection for Control Panel

7/27/2019 Third Party Inspection for Control Panel

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Third Party Inspection for Control Panel

The Third Party Inspection for Control Panel article provides you information

about control panel test and control pane inspection in manufacturing shop.

You may need to review this article in conjunctions of following article:

Inspection and Test Plan for Control Panel

This content guides you about all necessary

stages in the production of the Control Panels

from the examination of raw material 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 Control Panel and might not be complete for special cases.

This content may be useful for second party inspectors, Control Panel

manufacture quality control personnel, engineering companies and purchasers

as well.

All Control Panel 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

control panel which is under construction process

are:

Design code

Purchase order specification

Purchaser's standards

Approved drawings

The applicable codes and standard may be based

any international standards. This content is

general and can be useful for all recognized

standards.

Required Documents for Third Party Inspector Review:

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.

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Party Inspection for Control Panel http://www.inspection-for-industry.com/third-party-inspection-for

10/29/20



This already explained in the Inspection and Test Plan for Control Panel article.

These are the list of documents which are normally agreed to be presented to

the inspector:

Control Panel Purchase Order or Contract

Control Panel Manufacture Quality Control Plan

Control Panel Inspection and test plan

Control Panel Data Sheet

Control Panel Approved drawings, (arrangements, schematics, wiring,

single line)

Control Panel Material Test Reports

Control Panel Welding Specification Procedures (WPS) and Procedure

Qualification Records(PQR)

Control Panel Welders Qualifications Reports

Control Panel Calibration Certificates for Test Equipment

Control Panel Special procedures

Control Panel Special qualifications

Control Panel Preparation and Painting Procedure

Control Panel Preservation, Packing and Shipping Procedure

Control Panel Packing List

Third Party Inspection for Control Panel-Material Inspection

The first actual inspection work in the Control Panel is raw materials inspection.

The original or authenticated copies of mill certificates of material 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:

Certificate No.

Heat or cast No.

Chemical composition.

Mechanical properties.

Heat treated condition.

NDE applied and results.

Surface finish

Then inspector witnesses the materials identification on the certificates against

materials marking. It is also necessary to check with Control Panel drawing

datasheet, material list and other specification as appropriate.

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Visual inspection for surface finish and probable defects is done and

dimensional compliance with specification need also to be controlled.

When the third party inspector carried out the material inspection, then provides

inspection visit report (IVR), the report contains following items:

Confirmation of satisfactory document review

Record of the endorsement of certification reviewed/witnessed

Record of all non-conformities

Record of any tests witnessed and the result

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Third Party Inspection for Control Panel Construction

When Control Panel raw material inspection carried out and results was

satisfactory or non-conformities closed by remedial action, then Control Panel

manufacture will start fabrication.

The third party Inspector checks following points on control panel based on the

inspection and test plan (ITP) which is already agreed between purchaser and

control panel manufacture.

The inspection scope is determined in the ITP, some purchasers prefer to have

stringent control and assign the TPI inspector in more “hold or witness points” for

inspection and test activities and some others prefer lesser “hold or witness

points” and assign TPI much more in the “review document”.

This depend to the inspection budget which purchasers 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.

For more detail review Inspection and Test Plan for Control Panel article. There is

draft ITP in this article which I believe it is the best practice for Control Panel

inspection.

The third party inspector checks following items in Control Panel construction

process:

Paint using specified colour swatch, thickness measurement, if specified

Name plate control

Outline dimensions, interface dimensions, bus bar dimensions and

Clearances and other specified dimensions

Tightness/torque of terminals

Degree of protection

It is necessary the results to meet drawings and applicable standards.

Third Party Inspection for Control Panel General Arrangement Check

The third party inspector checks that all instruments, compartments, control

switches etc. are correctly rated and are correctly located, with specified labelling

in accordance of approved drawings.

If the third party inspector is not in hold or witness point in the project ITP for this

stage, then will review control panel manufacture quality control report in his/her

coming visit or in the final inspection day.

Third Party Inspection for Control Panel Insulation Resistance Test

Insulation resistance is measured between control circuits and earth (with

sensitive devises excluded) with a 500V Megger.

Similarly insulation resistance is measured in all applicable permutations for any

power circuits, if these are included within the control system, with a Megger

selected to the voltage calculated appropriate to the applicable specification.

The test result depends to the circuit but would not be acceptable if it is less

than 2 Megohms.

If the third party inspector is not in hold or witness point in the project ITP for this

stage, then will review control panel manufacture quality control report in his/her

coming visit or in the final inspection day.


10/29/20



Control Panel Withstand Voltage Test (Dialectric Test)

Power frequency voltage of 1.5 kV is applied between control circuits and earth

for 1 minute.

Similarly power frequency voltage, calculated appropriate to the applicable

specification, is applied to all applicable permutations for power circuits for 1

minute.

The test would be acceptable if no flashover and puncture occurs during thetest.

Similarly if the third party inspector is not in hold or witness point in the project

ITP for this stage, then will review control panel manufacture quality control

report in his/her coming visit or in the final inspection day.

Third Party Inspection for Control Panel Sequence Test

Control circuitry is functionally tested and circuits proven by appropriate tests.

The test result would be acceptable if meet approved schematic diagrams

(including appropriate, recorded, “as built” alterations) and project philosophy




Third Party Inspection for Control Panel Mechanical Operation Test

The following mechanisms are checked for operation:

Locking

Interlocking systems

Drawing mechanisms

Opening and shutting mechanisms

Interchangeability.

The test would be acceptable if all mechanisms work correctly.




Third Party Inspection for Control Panel Painting and Coating Inspection

Surface preparation for painting is checked for the following points, according to

specification by third party inspector:

Cleaning method (Blast or scraping and wire brushing)

Preparation grades

Freedom from weld spatter, blow-holes and other defects

Dry film thickness is checked according to specification

It is necessary surface condition to be free from pin-holes, runs damage and

other discontinuity.

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10/29/20




Third Party Inspection for Control Panel Reporting:

Third party inspector provides Inspection Visit Report (IVR) after each visit as well

as a final report summarising the activities carried out during the Control Panel

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 Control Panel.

Third Party Inspection for Control Panel Release Note:

When required by the contract or purchase order a release note is issued by

third party agency and given to the manufacturer when the Control Panel have

been finally accepted.

Third Party Inspection for Control Panel Packing, Marking and Shipping:

The following points are checked by the third party inspector:

Verify that the packing materials conform to specifications and accepted

practice for the mode of transport.

Verify protection against humidity, abrasion, distortion and other damage.

Verify shipping marks to marking instructions and record.

Verify handling marks.

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