General exemptions. For the purpose of this rule, vessels forming part of a processing plant shall mean vessel s in which a unit process or unit operation is carried out and vessel s which contain, as a process requirement, compressed gas received from and consumed in the same processing plant, provided that the water capacity of the vessel s shall be such that the gas stored therein at the maximum working pressure shall not exceed the requirement for feeding the consuming point s for a period not exceeding sixteen hours at the designed flow rate. Restriction on filling, manufacture and import of pressure vessels including fittings and vapouriser. The approval shall remain valid initially for a period of one year. Subsequently based on the satisfactory performance report, the approval may be periodically renewed for five years. The fee for renewal shall be as specified in clause B of Schedule I; iii Any person seeking approval of design of a pressure vessel, vaporiser or fitting to be fabricated by him in his shop approved under clause ii , shall submit to Chief Controller- a two copies of design calculations as per fabrication code, accepted by the Chief Controller, and duly vetted by an Inspector; b two copies of fabrication drawings prepared as per fabrication code and design calculations duly vetted by an Inspector; c a scrutiny fee specified in clause B of Schedule I.

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Free for one month and pay only if you like it. Short title and commencement. General exemptions. For the purpose of this rule vessels forming part of a processing plant shall mean vessels in which a unit process or unit operation is carried out and vessels which contain, as a process requirement, a compressed gas received from and consumed in the same processing plant, provided that the water capacity of the vessel s shall be such that the gas stored therein at the maximum working pressure shall not exceed the requirement for feeding the consuming point s for a period not exceeding 16 hours at the designed flow rate.

Restriction on filling, manufacture and import. Restriction on delivery and despatch. Repair to pressure vessels. Any such repairs, additions or alterations approved by the Chief Controller shall be carried out in the manner and by practices acceptable under the design code referred to in rule Provided that nothing in this rule shall apply to the replacement of any of the fitments of the vessel which does not involve any heating. Prohibition of smoking, fires, lights etc. Supervision and operation within the licensed premises.

Special precautions against accidents. Procedure for payment of fees. Procedure for grant and revocation of recognition to competent person and Inspector. Every application shall be accompanied by scrutiny fees of Rs.

The Chief Controller shall register such application and within a period of sixty days of the date of receipt of the application, either after having satisfied himself with regard to competence and professional ethics recognise the applicant as a competent person or an Inspector, as the case may be, or reject the application specifying the reasons therefor.

Design code. Design pressure. Design of vessels for gases at low temperature. The entire insulation shall be covered with a metal jacket of a thickness not less than 3 mm. The outer vessel of vacuum insulated cryogenic tanks shall be designed for a minimum collapsible pressure of one atmosphere gauge. The suitable protecting coating shall be provided on the outer vessel to avoid corrosion.

The supports shall be able to withstand expansion or contraction within the operating temperature range. Cryogenic pressure vessels meant for transport purpose, shall be able to withstand combined loading of vertical down of two, vertical upward of one and a half, longitudinal of one and a half and lateral of one and a half times the weight of the vessel with attachment and the full load of cryogenic liquid.

The factor of safety of the supports shall be as per the design code; v the air in the annular space between the inner and outer vessel shall be evacuated and the space shall be filled with suitable insulating material compatible with the particular cryogenic liquid. Filling capacity and filling pressure.

If vessel is uninsulated, or to the highest temperature which the contents are likely to reach in service, if the vessel is refrigerated or insulated. This requirement shall be applicable irrespective of the ambient temperature of the product at the time of filling. An overflow pipe shall be provided at the maximum usable capacity level as a safeguard against filling the vessel beyond the maximum usable capacity.

Markings on pressure vessels. Painting of vessels. All static vessels for storage of corrosive, flammable or toxic gas in liquefied state shall not have more than one pipe connection at the bottom for inlet or outlet, apart from the drainage. No drainage pipe shall be provided direct from spherical vessel. The bottom inlet or outlet pipe for spherical vessel shall be integrally welded to the vessel and extended upto three metres beyond the shadow of the vessel, at the end of which, combination of manual and remote operated valve shall be provided.

The discharge area of such device shall be at least 0. The relief device shall function at a pressure not exceeding the internal design pressure of the outer vessel;] ii the relief valves shall be spring loaded and shall be set to discharge and reach full flow conditions as required by the design code referred to in rule 12; iii weight loaded relief valves shall not be permitted; iv the relief valves be so designed that they cannot be inadvertently loaded beyond the set pressure; v the design of the valves shall be such that the breakage of any part will not obstruct free discharge of the liquid under pressure.

The rated discharge capacity of the device shall be determined at a pressure of per cent. The test certificate shall be issued in the prescribed pro forma. Periodic testing of pressure vessel in service. Precautions to be observed in carrying out hydraulic test.

During the process of cleaning and removal of sludge, if any, all due precautions shall be taken against fire or explosion, if such sludge is of pyropheric nature or contains spontaneously combustible chemicals; ii as soon as the test is completed, the vessel shall be thoroughly dried internally and shall be clearly stamped with the marks and figures indicating the person by whom the test has been carried out and the date of test and a record shall be kept of all such tests; iii any vessel which fails to pass the hydraulic test or which for any other reason is found to be unsafe for use shall be destroyed or rendered unsuitable under intimation to the Chief Controller.

The minimum distance between vessel and enclosure wall shall be the diameter of the vessel or five metres, whichever is less. The ground shall be graded to form a slope away from pumps, compressors or other equipments. The height of the enclosure wall shall be thirty centimetres on the upper side and gradually increasing to maximum sixty centimetres on the lower side, at the end of which a shallow sump for collection of the spilled liquid, if any, shall be provided.

The minimum separation distance between the vessel and the sump shall be,— a diameter of the vessel, in case of vessels with water capacity not exceeding forty thousand litres, b fifteen metres, if the water capacity of the vessels exceeds forty thousand litres.

Foundations for pressure vessels. No smoking. Fire protection. The application of water may be by hydrants, hoses and mobile equipments, fixed monitors or by fixed spray systems which may be automatic.

Control of water flow should be possible from outside any danger area. The fire water system shall be designed with medium velocity sprinklers for above-ground storage vessels, filling sheds, loading or unloading area, and pump sheds having minimum spray density of ten litres per minute per square metre for the single largest risk area and with additional requirements for hydrant points.

In plants referred to in Table 4A of rule 22, the quantity of water available shall be sufficient for four hours of fire-fighting, and in plants referred to in Table 4B of rule 22, the same shall be for two hours of fire-fighting.

For other installations not covered under Tables 4A and 4B, the fire water storage shall be as approved by the Chief Controller. The outer of each hose line shall be equipped with a combination jet and fog nozzle. The hoses should be maintained well and periodically inspected; iv mobile equipment, fixed monitors or fixed spray systems shall be designed to discharge water at a rate sufficient to maintain an adequate film of water over the surface of the vessel and supports under fire conditions; v consideration shall be given to the provision of mobile or fixed water spray systems giving suitable and effective protection for vehicle loading and unloading areas; vi at least two dry chemical powder type fire extinguishers of 9 kg.

In dispensing stations having above-ground liquefied petroleum gas storage vessels, hydrants with minimum water pressure of seven kilograms per square centimetre shall be provided at convenient positions for alround coverages of storage vessels and handling area, and water sprinklers with spray density of ten litres per minutes per square metre shall be provided. The fire water pump shall be preferably diesel engine driven with capacity to deliver water at the rate and pressure specified above.

The minimum fire water storage at the premises shall be that needed for fighting fire atleast for one hour. Loading and unloading facilities. If full rake handling is required, it shall be placed in two separate gantries with fifty metres, distance in between them.

Transfer operations. Where wheel chock blocks have been used they shall be removed. The vehicle shall be checked to ensure that it is in safe working order and the surrounding areas checked to ensure that any liquefied flammable gas that may have leaked or has to be vented has safely dispersed.

Dispenser for liquefied petroleum gas dispensing station. Electrical apparatus and installations. The cables shall be mechanically continuous throughout and effectively earthed away from the vessels. Classification of hazardous area for flammable gases. Extent of hazardous area. Lighting of storage and opening areas. Certificate of safety. Vehicles for transport of compressed gas.

Provision shall be made for distributing the localised stresses arising from attachments to the vessels. Protection of valves and accessories. Brittle materials, such as, cast iron shall not be used.

The form of this marking should correspond with the operating procedure laid down for the vehicle. Vehicle design considerations. Marking of vehicle.

Certificate of safety 1[in prescribed proforma]. Inspection and maintenance of vehicles. Licence for storage of compressed gas. Prior approval of specification and place of vessels and premises proposed to be licensed. No-objection Certificate. Licence for transport of compressed gas. Grant of licence. Application for licence. Period for which licences may by granted or renewed. Particulars of licence.

Power of licensing authority to alter conditions. Prior approval necessary for alteration in the licensed premises. Amendment of licence. Renewal of licence. Refusal of licence. Suspension and cancellation of licence.


Draft notification for amendment in SMPV (U) Rules, 2016 and Gas Cylinders Rules, 2016






Static and Mobile Pressure Vessels (Unfired) (Amendment) Rules, 2018



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