TITLE 8
UNFIRED PRESSURE VESSEL SAFETY ORDERS
Chapter 4, Subchapter 1, Article 1, Sections 450 and 453; and
Article 5, Sections 471, 475, 477, 486, 487, 494 and New Appendix D
Liquefied Petroleum Gas Systems
Amend Section 450 to
read:
§ 450. Application of the Unfired Pressure Vessel
Safety Orders.
(a) These Orders apply to places of employment in California, and establish minimum standards for:
(1)
The design, construction, and installation of LP-Gas containers, including the
storage and handling of LP-Gas.
National Fire Protection Association (NFPA) 58, Standard for the
Storage and Handling of Liquefied Petroleum Gases LP-Gas Code, 1992
1998 Edition, is hereby incorporated by reference. Supplementing NFPA 58 are these Safety
Orders, beginning with Sections 470 through 494, which are determined necessary
for the protection of the safety and health of employees.
* * * * *
(6)
The design, construction, repair and alteration of LNG, LPG and NH3
storage tanks for operation at 15 psig or less.
(b)
After the date on which these Orders become effective, all installations and
equipment shall conform to these Orders, except as noted in Section 451.
EXCEPTION: Existing installations and equipment which
were and remain in compliance with the Safety Orders, or variances therefrom,
in effect at the time of manufacture or installation.
(c)
When any provision of these Safety Orders conflicts with NFPA 58 and is more
stringent than the corresponding sSection of NFPA 58, the Safety
Order shall take precedence.
EXCEPTION: Existing installations and equipment which
were and remain in compliance with Safety Orders, or variances therefrom, in
effect prior to the effective date of these Safety Orders.
Note: Authority cited: Section 142.3, Labor Code; and Section 13241, Health and Safety
Code. Reference: Section 142.3, Labor Code.
Amend Section 453 to
read:
§ 453. Definitions.
The
following definitions shall apply in the application and interpretation of
these Orders. For definitions directly
relevant to LP-Gas, see 1992 1998 Edition of NFPA 58, Sections
1-7 1-6.
* * * * *
Note: Authority
cited: Section 142.3, Labor Code. Reference:
Sections 142.3 and 7622, Labor Code; and Section 13241, Health and
Safety Code.
Amend Section 471 to
read:
§ 471. Control of Products in Tanks and Cylinders.
(a)
The order requiring that all LP-Gases shall be odorized by the addition of a
warning agent may be waived by the Division upon written application when the
LP-Gas is to be used exclusively in a process where the presence of an odorant
would make the LP-Gas unfit for use in the process and for deliveries between
refineries or between producing wells and refineries. No LP-Gas shall be transported or delivered into any
vessel covered by these Orders until first odorized using a warning agent of
such character that the gases are detectable, by a distinct odor, down to a
concentration in air of not over one-fifth the lower limit of flammability.
(b) Any tank used to transport or store
unodorized LP-Gas shall have a warning sign reading “NOT ODORIZED" on both
sides (and rear of transportation tanks), in letters at least 4 inches high.
EXCEPTION: When the
LP-Gas is to be used exclusively in a process where the presence of an odorant
would make the LP-Gas unfit for use in the process and for deliveries between
refineries or between producing wells and refineries, a waiver may be obtained
from the Division upon written request.
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code; and Section 13241, Health and Safety
Code.
Amend Section 475 to
read:
§ 475. Location of Storage Containers and
Regulating Equipment.
* * * * *
(c)
Installation of stationary LP-Gas containers on the rooftop shall be prohibited.
Note: Authority cited: Section 142.3, Labor Code.
Reference: Section 142.3, Labor
Code; and Section 13241, Health and Safety Code.
Amend Section 477 to
read:
§ 477. Installation of Containers.
(a)
Aboveground Containers.
(1)
Metallic structural supports, when used, shall be encased in concrete or other
material having a fire-resistant rating of at least 1 2 hours
when the distance between the lower surface of the tank and the top of the
concrete or masonry foundation exceeds 18 inches.
(2) Aboveground storage containers shall be protected from impact from vehicles by means of crashposts, curbs, fences, railings or similar barriers. Where crashposts are used, they shall be no less than 5 feet long with 2 feet below ground and encased in concrete. Posts shall be no less than 4 inches in diameter and be filled with concrete if the wall thickness is less than that of standard pipe. Posts shall be 4 feet apart on centers (maximum) and at least 3 feet from the storage container. Other materials may be used and shall provide equivalent protection. Such curbs or fences shall be arranged so they will not hamper free ventilation around the containers.
The effective date shall be 12 months after date
of filing for new crashpost installations.
(3) When multi-container installations are
manifolder together, the 86 1/2% levels shall be in substantially the same
horizontal plane.
* * * * *
(b)
Mounded Containers.
* * * * *
(1) Construction.
* * * * *
(C)
Relief-valve capacity and installation shall be that which is required for
aboveground containers and shall comply with NFPA 58, Section 3-2.5.3(b)
3-2.6.3, as measured from the tank shell.
* * * * *
Note: Authority cited: Section 142.3, Labor Code.
Reference: Section 142.3, Labor
Code; and Section 13241, Health and Safety Code.
Section 486 is
repealed:
§ 486. Regulators.
(a) Single-stage regulators shall have a maximum
outlet pressure setting of 1 psi and shall be equipped with one of the
following:
(1) An integral pressure-relief device on the
outlet-pressure side, having a start-to-discharge pressure setting within the
limits specified in the Standard for LP-Gas Regulators, UL 144.
(2)
An integral over-pressure shutoff device that shuts off the flow of LP-Gas
vapor when the outlet-pressure of the regulator reaches the over-pressure
limits specified in UL 144. Such a
device shall not open to permit flow of gas until it is manually reset.
(b)
Second-stage regulators and integral two-stage regulators shall have a maximum
outlet-pressure setting of 14 inches, water column, and shall be equipped with
one of the following:
(1)
An integral pressure-relief valve on the outlet-pressure side having a
start-to-discharge pressure rating within the limits specified in the Standard
for LP-Gas Regulators, UL 144. This
relief device shall limit the outlet pressure of the second-stage regulator to
2.0 psi when the regulator seat disk is removed and the inlet pressure to the
regulator is 100 psi or less as specified in the Standard for LP-Gas
Regulators, UL 144.
(2)
An integral over-pressure shutoff device that shuts off the flow of LP-Gas
vapor when the outlet pressure of the regulator reaches the over-pressure
limits specified in UL 144. Such a
device shall not open to permit flow of gas until it has been manually reset.
Exception: Regulators with a rated capacity of more
than 500,000 Btu/hr shall be permitted to have a separate over-pressure
protection device complying with Paragraphs 2.9.2 through 2.9.8 of the National
Fuel Gas Code, NFPA 54 (ANSI Z223.1).
The over-pressure protection device shall limit the outlet pressure of
the regulator to 2.1 psi when the regulator seat disk is removed and the inlet
pressure of the regulator is 10 psi or less.
(c)
Integral two-stage regulators, except automatic changeover regulators, shall be
provided with means to determine the outlet pressure of the high-pressure
regulator portion of the integral two-stage regulator.
(d)
Integral two-stage regulators shall incorporate an integral pressure-relief
valve in the high-pressure regulator portion of the unit.
(e)
First-stage regulators shall incorporate an integral pressure-relief valve
having a start-to-discharge setting within the limits specified in the Standard
for LP-Gas Regulators, UL 144.
Exception: First-stage regulators with a rated capacity
of more than 500,000 Btu/hr shall be permitted to have a separate
pressure-relief device.
(f)
High-pressure regulators with a rated capacity of more than 500,000Btu/hr,
where permitted to be used in two-stage systems, shall incorporate an integral
relief valve or shall have a separate relief valve.
(g)
First-stage regulators shall have an outlet-pressure setting up to 10 psi in
accordance with the Standard for LP-Gas Regulators, UL 144.
(h)
Regulators shall be designed so as to drain all condensate from the regulator
spring case when the vent is directed vertically down.
Note: Authority cited: Section 142.3, Labor Code.
Reference: Section 142.3, Labor
Code; and Section 13241, Health and Safety Code.
Section 487 is
repealed:
§ 487. Regulator
Installation.
(a) A two-stage regulator system or an integral
two-stage regulator shall be required on all fixed piping systems that serve
1/2 psi appliance systems (normally operated at 11 inches water column
pressure). The regulators utilized in
these systems shall meet the requirements of Section 486. This requirement includes fixed piping
systems for appliances on RVs (recreational vehicles), mobile home
installations, manufactured home installations, catering vehicles, and food
service vehicle installations.
Single-stage regulators shall not be installed in fixed-piping systems
after June 30, 1997.
Exception No. 1: This requirement does not include shall
portable appliances and outdoor cooking appliances with input ratings of 100,000
Btu/hr or less.
Exception No. 2: Gas distribution systems utilizing multiple
second-stage regulators are permitted to use a high-pressure regulator
installed at the container, provided a first-stage regulator is installed
downstream of the high-pressure regulator and ahead of the second-stage
regulators.
Exception No. 3: High-pressure regulators with an
over-pressure protection device and a rated capacity of more than 500,000
Btu/hr shall be permitted to be used in two-stage systems where the second-stage
regulator incorporates an integral or separate over-pressure protection
device. This over-protection device
shall limit the outlet pressure of the second-stage regulator to 2 psi when the
regulator seat disk is removed and with an inlet pressure equivalent to the
maximum outlet pressure setting of the high-pressure regulator.
Exception No. 4: Systems consisting of listed components that
provide an equivalent level of over-pressure protection.
(b) First-stage or high-pressure regulators shall
be directly installed or attached by flexible connectors to the vapor-service
valve of a container or to a vaporizer outlet. The regulators shall also be
permitted to be installed with flexibility in the inner connecting piping of
manifolded containers or vaporizers.
Exception: First-stage regulators shall be downstream
of high-pressure regulators.
(c) First-stage and high-pressure regulators
shall be installed outside of buildings.
Exception No. 1: Regulators on portable containers installed
indoors in accordance with NFPA 58, Section 3-4.
Exception No. 2: Regulators on containers of less than 125
gallons for the purpose of being filled or in structures complying with NFPA
58, Chapter 7.
Exception No. 3: Regulators on containers on LP-Gas vehicles
complying with and parked or garaged in accordance with NFPA 58, Chapter 8.
Exception No. 4: Regulators on containers used with LP-Gas
stationary or portable engine fuel systems complying with NFPA 58, Chapter 8.
Exception No. 5: Regulators on containers used with LP-Gas
fueled industrial trucks complying with NFPA 58, Section 8-3.
Exception No. 6: Regulators on containers on LP-Gas fueled
vehicles garaged in accordance with NFPA 58, Section 8-6.
Exception No. 7: Regulators on portable containers awaiting
use, resale, or exchange when stored in accordance with NFPA 58, Chapter 5.
Section 487 repeal
continued:
(d) All regulators for outdoor installations
shall be designed, installed, or protected so their operation will not be
affected by the elements (freezing rain, sleet, snow, ice, mud, or debris).
This protection shall be permitted to be integral with the regulator.
Exception: Regulators used for portable industrial
applications.
(e) The point of discharge from the required
pressure-relief device on regulating equipment installed outside of buildings
in fixed piping systems shall be located not less than three feet horizontally
away from any building opening below the level of such discharge, and not
beneath any buildings unless the space is well ventilated to the outside and is
not enclosed for more than 50% of its perimeter. The point of discharge shall also be located not less than five
feet in any direction away from any source of ignition, openings into direct
vent (sealed combustion system) appliances, or mechanical ventilation air
intakes.
Exception: This requirement shall not apply to
vaporizers.
(f) The discharge from the required
pressure-relief device on regulating equipment installed inside of buildings in
fixed systems shall be vented with properly sized and supported piping to the
outside air with the discharge outlet located not less than three feet
horizontally away from any building opening below the level of such
discharge. The discharge outlet shall also
be located not less than five feet in any direction away from any source of
ignition, opening into direct vent (sealed combustion system) appliances, or
mechanical ventilation air intakes.
Exception No. 1: This provision shall not apply to appliance
regulators otherwise protected, or to regulators used in connection with
containers in buildings as provided for in NFPA 58, Section 3-2.2.1, Exceptions
Nos. 1, 2 ,4 ,5, and 6.
Exception No. 2: This requirement shall not apply to
vaporizers.
(g) Single-stage regulators shall be permitted to
be used only on small portable appliances and outdoor cooking appliances with
input ratings of 100,000 Btu/hr maximum.
Note: Authority cited: Section 142.3, Labor Code.
Reference: Section 142.3, Labor
Code; and Section 13241, Health and Safety Code.
Amend Section 494 to
read:
§ 494. Repairs and
Alterations.
* * * * *
(b)
No repair or alteration affecting the safety of any container or cylinder shall
be made until the contemplated repair or alteration has been authorized by a
qualified inspector. The owner or
user of the LP-Gas container shall ensure that the repair or alteration is
performed by a company with a valid ASME "U" or a National Board
"R" Certificate of Authorization. Nothing in this order shall prohibit tThe exchange
or interchange of valves, fittings, and accessories intended for the same
purpose shall not be considered a repair or alteration.
(c) No container or cylinder that has been subjected to a fire shall be returned to service until it has been inspected by a qualified inspector and found to be safe.
Any
container or cylinder which has suffered mechanical damage causing dents or
other deformation exceeding a depth of 1 1/2 times the thickness of the deformed
head or shell or two percent of the container diameter, whichever is greater,
shall be re-formed to its original shape or otherwise repaired as provided
in these Orders.
* * * * *
(e) The owner or user of the LP-Gas container shall
ensure that Aall repairs or alterations affecting the
safety of LP-Gas tanks shall be are reported to the Division
within 21 days by a qualified inspector authorizing the ASME “U” or
National Board “R” certificate holder making such repairs or alterations
using the appropriate National Board Form, "R-1", Report of Welded
Repair, or "R-2", Report of Alteration, or equivalent (See Appendix
D). The owner or user shall
ensure that the qualified inspector shall stamps his/her
certificate of competency number adjacent to all welded repairs authorized by
him/her, except that in the case of repairs to quenched and tempered
steels, this number need not be stamped.
This exception shall be noted in the inspector's report.
(f) Any welding necessary when making repairs or alterations to containers shall be done by a welder qualified in accordance with Section IX of the ASME Code in the position or positions used in making the repair.
(g) Repairs to DOT cylinders
and cargo containers shall be made under
DOT regulations and control in accordance with the requirements of 49 CFR
Section 173.34.
Note: Authority cited: Section 142.3, Labor Code.
Reference: Section 142.3, Labor
Code; and Section 13241, Health and Safety Code.