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Reg. 394

STEAM PIPES


Inspections of Steam Pipes

a)

Steam pipes shall be inspected and hydraulically tested before erection in place, the test pressure to be that prescribed in the standard conditions for steam pipes. A certificate from the Inspecting Authority in Form III-A, stating that this has been done by him may be accepted. If the Inspector is satisfied with the test, the pipes may be erected in position. The Chief Inspector shall intimate his approval to the owner regarding the suitability of the pipe line for use at the pressure and temperature to be specified.
b) At subsequent inspections of the boiler or at any other time, the Inspector may make an external inspection of the steam-pipes and for this purpose may require a part of the lagging at the flanges to be removed, and the pipe made bare. If as a result of this inspection the Inspector is of opinion that the pipes or any portions of them are in an unsatisfactory condition, he shall report the matter to the Chief Inspector, who may require the whole of the lagging to be removed and may require any pipe or pipes to be hydraulically tested. The test pressure at such hydraulic test shall be not less than one and a half times the working pressure of the boiler or the intended working pressure of the pipe, as the case may be.
c) A memorandum of Inspection Book shall be prepared in respect of steam-pipes and fittings in Form No. XIV. In this book, the Inspector shall enter in ink all particulars and dimensions of the steam pipes and fittings with calculations for the various parts in detail, particulars of hydraulic test and his inspection notes.

At subsequent inspection, the Inspector shall enter the date of the inspection and hydraulic test together with notes thereon.

The Inspector shall also enter in the Memorandum of Inspection Book remarks regarding the general condition of the steam-pipes and fittings, and repairs, replacements or alterations, if any, and the extent to which the steam-pipes have been cleaned of lagging and covering, so that the book provides a useful record of the steam-pipes and fittings for the information and guidance of Inspectors at subsequent inspection.

In the event of an accident to a pipe line or its fittings, necessary remarks shall also be entered in the book.

The Memorandum Book shall be submitted to the Chief Inspector, who will check all particulars and calculations and approve the working pressure and temperatures that are to be permitted for the various parts of the pipe line and fittings. The pressure and temperature once approved for the particular steam pipe line shall not be altered except on a written authority from the Chief Inspector.
 
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