hundred (1,900) liters
a. One hundred fifty five (155) centimeters
b. One thousand nine hundred
(1,900) liters to three thousand eight hundred (3,800) liters
b. Seven and three-fourth (7.75) meters
c. Over three thousand eight hundred (3,800) liters c. Fifteen and a half (15.5) meters
7. Pressure Relief Vent Piping
a. The piping of all relief vents shall be at least equal to the area of opening of the relief valve and so arranged as not to unduly restrict the flow.
b. Relief devices and/or relief device vents shall be so arranged that escaping gas will discharge unobstructed to the open air and not impinge on personnel, containers, equipment and structures or enter enclosed spaces.
c. Vents shall be installed in such a manner as to exclude or remove moisture and condensate, and to prevent malfunction due to freezing or icing. Drains shall be so installed as to prevent possible flame impingement on the container, piping, equipment and structures.
8. Dispensing of flammable cryogenic fluids, liquefied, or liquid oxidizers shall be at a locations not less than one and a half meter (1.5 m) in any direction away from any exterior source of ignition, openings into direct-vent (sealed combustion system) appliances, or mechanical ventilation air intakes.
295
9. Piping, Materials and Construction
a. All pipings and materials such as gaskets, thread compound, etc., shall be suitable for the intended use through the full range of pressure and temperature to which they will be subjected, maintaining a safety factor of four (4) to one (1).
b. The piping system shall be designed and constructed to provide adequate allowance for expansion, contraction, vibration,
settlement, and fire exposure.
c. Joints on all container piping and tubing over five (5) centimeters in nominal diameter shall be made by welding or with welded
flanges.
d. Piping outside buildings may be either buried or aboveground. In either case, it shall be well supported and protected against physical damage and corrosion.
e. All piping and tubing shall be tested after installation, at not less than one and one-half (1 ½) times hydraulically, or one and one fourth (1 ¼) times pneumatically, the maximum working pressure and proven free of leaks.
B. Equipment and Devices
1. All cryogenic containers, equipment and devices used for the storage, handling and transportation of cryogenic fluids shall be of
approved type. Approved types are those covered with appropriate certification from its manufacturers and/or certifying authority concerned.
2. Electrical Equipment
a. Electrical installations and equipment shall conform to the provisions of the Philippine Electrical Code, equipment
manufacturers’ instruction and/or other applicable international standards as deemed necessary.
b. Proper lighting, including emergency lights shall be provided for fire protection appliances and operating facilities such as walkways, control valves, gauges, and similar devices or servicing facilities for the cryogenic fluids.
3. Electrical Grounding or Bonding
a. Containers, systems, and equipment used for flammable cryogenic fluids shall be grounded and/or bonded in accordance with NFPA 77, “Recommended Practice on Static Electricity,” and the 296
Philippine Electrical Code. Suitable means shall be taken to
protect the system against corrosion, including corrosion caused by stray electric currents.
b. Containers and systems containing cryogenic fluids shall be equipped with lightning protection when installed outside the building/ structure.
4. Valves and Accessory Equipment
a. All valves and equipment shall be suitable for the intended use at the temperature of the application and shall be designed for not less than the maximum pressure and the minimum temperature to which they may be subjected, maintaining a safety factor and four (4) to one (1).
b. Shutoff valves shall be provided on all container connections.
Shutoff valves shall be located as close as practicable to the container.
c. All liquids and vapor connections on flammable cryogenic fluid containers, except relief and gauging connections over twelve millimeters (12 mm) pipe size, shall be equipped with check valves, or remotely controlled automatic quick-closing valves, and shall remain closed except during operating periods.
d. Shutoff valves shall be installed in the piping system as needed to limit the volume of liquids discharged in the event of piping or equipment failure. Relief valves shall be installed between shutoff valves in all pipelines.
e. All inlet and outlet connections, except relief valves, liquid level gauging devices, and pressure gages on any container, shall be labeled to designate whether they are connected to vapor or liquid space.
C. Warning Labels
1. Warning labels and signs shall be posted visibly from any direction of approach on cryogenic containers and equipment. In addition, they shall be properly marked with the name of the specific cryogenic fluid, manufacturer/ supplier and contact details.
2. The name of the specific cryogenic fluid shall be conspicuously affixed at the entrances to locations where they are stored, handled, used, or dispensed, and at such other locations as may be designated by the City/Municipal Fire Marshal having jurisdiction.
2973. Warning labels and signs shall adopt the hazard identification signs as set forth in NFPA 704, Standard System for the Identification of the Hazards of Materials for Emergency Response.
4. Signs and markings shall not be obscured or removed, 5. Markings on Containers
Each container shall be identified by the attachment of a nameplate in an accessible place marked with the following information:
a. Builder's name and date built b. Nominal capacity, in liters c. MAWP
d. Maximum permissible specific gravity of liquid to be stored e. Maximum level to which container may be filled with stored liquid f. Maximum level to which container may be filled with water for container was designed
g. Minimum temperature in degrees Celsius (Centigrade) for which container was designed
6. Vehicles transporting cryogenic fluids shall be labeled at the front, rear and on each side identifying the product. Labels/placards shall have
letters not less than four inches (4 in) in height using approximately a five-eight inch (5/8 in) stroke. Abbreviations shall not be used. In addition to the label/placard identifying the product, vehicles shall also bear "FLAMMABLE GAS”, or “OXIDIZER".
D. Safety Measures
1. Insulation shall be non-combustible and shall be non-reactive with oxygen-enriched air.
2. A positive alarm or other approved device based on internationally accepted standard shall be provided to warn against overfilling.
3. Vehicles transporting cryogenic fluids shall be equipped with at least one (1) unit of approved type fire extinguisher, with a minimum rating 20-B, C; and with adequate chock blocks.
E. Fire Safety Clearance
1. A Fire Safety Clearance shall be obtained from the City/Municipal Fire Marshal having jurisdiction, for the following:
a. Manufacture, storage or sale of cryogenic fluids;
b. Transportation on the highway of flammable cryogenic fluids in excess of four hundred fifty liters (450 .);
298c. Transportation on the highway of liquefied oxygen or cryogenic oxidizers in excess of four hundred fifty liters (450 .).
d. Storage and transporting of non-flammable nontoxic cryogenic fluids in excess of one thousand nine hundred liters (1,900 .).
e. Storage or use of more than thirty eight liters (38 .) of liquefied oxygen, flammable cryogenic fluids or cryogenic oxidizers.
2. Materials Safety Data Sheet (MSDS) shall be a pre-requisite to the issuance of the required Fire Safety Clearance.
Table 25: PROPERTIES OF CRYOGENIC FLUIDS GAS
BOILING POINT