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Oisd (Oil Industry Safety Directorate)

Liquefied Petroleum Gas (LPG) Installations

This standard lays down the minimum safety requirements on design, layout, storage, loading / unloading, operation, inspection & maintenance, fire protection, emergency planning and safety audit systems of LPG Installations. This standard does not cover process plants, the distribution of LPG to domestic & non-domestic consumers and pipeline operations, road / rail transportation, refrigerated and mounded storage facilities for LPG.

This standard is not applicable to bottling plants having a bulk LPG inventory not exceeding 100 MT with minimum two storage vessels and with LPG bottling a total quantity not exceeding 20 MT per shift of 8 hrs. The safety requirements for such LPG Bottling plants are covered in OISD-GDN-169.

Safety requirements for mounded Storage facilities are covered in OISD-STD-150. The requirements for Auto LPG Dispensing Stations are covered in OISD-STD-210.

The green belt /buffer zone beyond the installation boundary is outside the scope of this standard. Such provisions may be considered based on local environment / security requirements.

LPG Tank Trucks - Requirements of Safety on Design/Fabrication and Fittings

This standard covers basic requirements of safety in design / fabrication of vessels with material specifications, fittings and mountings, for transportation of LPG conforming to IS: 4576 having maximum vapour pressure not exceeding 16.87 Kg/Sq. cm. at 65 Deg. C. in bulk by road tank trucks. This standard will be applicable for all new LPG tank trucks.

Protection to fittings mounted on existing LPG tank trucks

SMPV Rules - 1981 lay down design, fabrication, and operating procedure for carrying compressed gases.

This standard stipulates actions required for improving some of the provisions of these rules like fittings, pressure relief, emergency shut off valves, liquid level gauging device and pressure gauge so as to reduce chances of accidental damage to various fittings mounted on LPG tank truck.

Some of the recommendations envisage updating existing Standards and would require amendment of the exiting Statutory Rules Viz. Static and Mobile Pressure Vessels (unfired) Rules 1981.

The provisions which are not in conformity with SMPV Rules- 1981 therefore will be made applicable after the Rules are formally amended.

The standard excludes new tank trucks which will be fabricated in coming years as they will be conforming to more stringent standard which is currently under development.

LPG Tank Truck Incidents: Rescue & Relief Operations

This standard covers guidelines for handling emergencies arising out of LPG Tank Truck (TT) incidents. The location in=charges, based on these guidelines, should identify necessary resources so as to handle such incidents promptly. These guidelines can be modified to reflect local conditions as well as the capabilities of the response team.

Guidelines for Rescue & Relief operations for POL Tank Truck Accident are covered in OISD-GDN-165.

Safety in Installation & Maintenance of LPG Cylinders Manifold

This Standard covers LPG cylinders (all types approved by CCE) connected through a manifold to commercial/ domestic, industrial burners where the end use of LPG is for Commercial cooking/ production/ Laboratory purposes.

The standard supplement IS: 6044 (part I) - 1971 on guidelines for packed cylinder installation. Items covered under IS: 6044 (part I) - 1971 are not being repeated and this standard may be referred in conjunction with IS: 6044 (Part I) - 1971.

It relates to safe practices in Design, erection, commissioning and maintenance of manifold installations. However, detailed operational practices like handling emergencies etc. are not covered.

Oil industry is in the process of drawing out detailed specifications of the equipments used in the manifold LPG cylinders installations. All equipments used in these installations shall meet the above specifications.

For replacement schedules in the installation, equipment guidelines suggested by the manufacturers may be followed.

Guidelines on Small LPG Bottling Plants (Design & Fire Protection facilities)

This standard covers the general layout principles of LPG storage, bottling and bulk handling facilities.

Storage, Handling and Refueling of LPG for automotive use

This standard lays down the minimum safety requirements for Auto LPG Dispensing Stations. It does not cover the certification or fitness requirements of vehicles using LPG. This Standard does not deal with provision of CNG and LPG dispensing facilities together for automotive use in the same station.
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