General Safety & Health Standards |
Storage and Handling of Anhydrous
Ammonia |
For
printingWAC 296-24-51015 Systems utilizing portable DOT containers.
This section applies specifically to systems utilizing cylinders, portable tanks (DOT-51), or "ton containers" (DOT-106A, DOT-110A), constructed in accordance with department of transportation specifications. All basic rules of WAC 296-24-51009 apply to this section, unless otherwise noted.
(1) Containers.
(a) Containers shall comply with department of transportation specifications and shall be maintained, filled, packaged, marked, labeled and shipped to comply with current DOT regulations and American National Standard Method of Marking Portable Compressed Gas Containers to Identify the Material Contained, Z48.1.-1954 R1970). (See Appendix C for availability.)
(b) Containers shall be stored in an area free from ignitable debris and in such manner as to prevent external corrosion. (Storage may be indoors or outdoors.)
(c) Containers shall not be buried below ground.
(d) Containers shall be set upon firm foundations or otherwise firmly secured. The possible effect of settling on the outlet piping shall be guarded against by a flexible connection or special fitting.
(e) Containers shall be protected from heat sources such as radiant flame and steam pipes. Do not apply heat directly to containers to raise the pressure.
(f) Containers shall be stored in such manner as to protect them from moving vehicles or external damage.
(g) Any container which is designed to have a valve protection cap shall have the cap securely in place when the container is not in service.
(2) Container valves and regulating equipment.
(a) Container valves and pressure regulating equipment shall be protected against tampering when installed for use.
(b) Container valves shall be protected while in transit, in storage, and while being moved into final utilizations, as follows:
(i) By setting them into a recess of the container, or
(ii) By ventilated cap or collar, fastened to the container, capable of withstanding a blow from any direction equivalent to that of a 30-lb. weight dropped four feet. Construction must be such that a blow will not be transmitted to the valves or other connections.
(c) When containers are not connected for service, the outlet valves shall be kept tightly closed even though containers are considered empty.
(3) Safety relief devices. Containers shall be provided with safety relief devices as required by department of transportation regulations.
[Statutory Authority: RCW 49.17.010, .040, .050. 02-12-098 (Order 00-20), § 296-24-51015, filed 06/05/02, effective 08/01/02. Order 73-5, § 296-24-51015, filed 5/9/73 and Order 73-4, § 296-24-51015, filed 5/7/73.]
WAC 296-24-51017 Systems mounted on trucks, semi-trailers, and trailers for transportation of ammonia.
This section applies specifically to systems mounted on trucks, semi-trailers and trailers (other than those covered under WAC 296-24-51019 and 296-24-51021) used for the transportation of ammonia. All basic rules of WAC 296-24-51009 apply to this section unless otherwise noted. Systems for trucks and trailers for transportation of anhydrous ammonia, in addition to complying with the requirements of these standards, shall also comply where required, with the requirements of the department of transportation and those of any other regulatory body which may apply.
(1) Design pressure of containers.
(a) Containers used in intrastate commerce shall be constructed in accordance with WAC 296-24-51009(2) with a minimum design pressure of 250 psig. Containers used in interstate commerce shall meet DOT regulations.
(b) The shell or head thickness of any container shall not be less than 3/16 inch.
(c) All container openings, except safety relief valves, liquid level gaging devices and pressure gages, shall be labeled to designate whether they communicate with liquid or vapor space. Labels may be on valves.
(d) Baffles are not required for cargo tanks.
(2) Mounting containers on truck.
(a) The means of attachment of any container to the cradle, frame or chassis of a vehicle shall be designed on a basis of two "g" loading in either direction, using a safety factor of not less than 4, based on the ultimate strength of the material used. For purposes of this requirement, two "g" of load support is equivalent to three times the static weight of the articles supported; two "g" of loading and bending, acceleration, and torsion is equivalent to twice the static weight support applied horizontally at the road surface.
(b) "Hold-down" devices, when used, shall anchor the container to the cradle, frame or chassis in a suitable and safe manner that will not introduce undue concentration of stresses. These devices shall incorporate positive means for drawing the container down tight, and suitable stops or anchors shall be provided to prevent relative movement between container and framing due to stopping, starting or changes in direction.
(c) Vehicles designed and constructed so that the cargo tanks constitute in whole or in part the stress member used in lieu of the frame shall be supported by external cradles suspending at least 120° of the shell circumference. The design calculation shall include beam stress, shear stress, torsion stress, bending moment and acceleration stress, in addition to those covered by the code under which the cargo tank was designed.
(d) If a liquid withdrawal line is installed in the bottom of a container, the connections thereto, including hose, shall not be lower than the lowest horizontal edge of the trailer axle.
(e) Provisions shall be made to secure both ends of the hose while in transit.
(f) When the cradle and the container are not welded together, suitable material shall be used between them to eliminate metal-to-metal friction.
(3) Container appurtenances.
(a) Nonrecessed container fittings and appurtenances shall be protected against physical damage by either: (i) A protected location, (ii) the vehicle frame or bumper, or (iii) a protective housing. The protective housing, if used, shall comply with the requirements under which the containers are fabricated with respect to design and construction, and shall be designed to withstand static loadings in any direction equal to twice the weight of the container and attachments when filled with the lading using a safety factor of not less than 4, based on the ultimate strength of the material to be used. The protective housing if used shall be protected with a weather cover, if necessary, to insure proper operation of valves and safety relief devices.
(b) All connections to containers, except filling connections (see WAC 296-24-51017 (3)(c)), safety relief devices, and liquid level and pressure gage connections, shall be provided with suitable automatic excess flow valves, or in lieu thereof, may be fitted with quick-closing internal valves, which shall remain closed except during delivery operations. The control mechanism for such valves may be provided with a secondary control remote from the delivery connections and such control mechanism shall be provided with a fusible section (melting point 208F to 220F) which will permit the internal valve to close automatically in case of fire.
(c) Filling connections shall be provided with automatic back-pressure check valves, excess-flow check valves, or quick-closing internal valves, to prevent back-flow in case the filling connection is broken. Where the filling and discharge connect to a common opening in the container shell and that opening is fitted with a quick-closing internal valve as specified in WAC 296-24-51017 (3)(b), the automatic valve shall not be required.
(d) All containers shall be equipped for spray loading (filling in the vapor space) or with an approved vapor return valve of adequate capacity.
(e) All containers shall be equipped with a fixed maximum liquid level gage.
(f) All containers shall be equipped with a pressure-indicating gage having a dial graduated from 0-400 psig.
(4) Piping and fittings.
(a) All piping, tubing and fittings shall be securely mounted and protected against physical damage.
(b) Piping used on nonrefrigerated systems shall be at least ASTM A-53 Grade B electric resistance welded and electric flash welded pipe or equal. Such pipe shall be at least Schedule 40 when joints are welded, or welded and flanged. Such pipe shall be at least Schedule 80 when joints are threaded. Brass, copper, or galvanized steel pipe or tubing shall not be used.
(c) The truck unloading line shall be provided with an excess flow valve at the hose connection unless an approved quick closing internal valve is provided in the container unloading connection. (See WAC 296-24-51017 (3)(b).)
(5) Safety relief devices. The discharge from container safety relief valves shall be vented away from the container upward and unobstructed to the open air in such a manner as to prevent any impingement of escaping gas upon the container; loose fitting rain caps shall be used. Size of discharge lines from safety relief valves shall not be smaller than the nominal size of the safety relief valve outlet connection. Suitable provision shall be made for draining condensate which may accumulate in the discharge pipe.
(6) Marking of container. Every container, whether loaded or empty, shall be conspicuously and legibly marked on each side and rear thereof on a background of sharply contrasting color with the words "compressed gas" in letters at least four inches high; or with the words "anhydrous ammonia" in letters at least four inches high; or in compliance with department of transportation regulations.
(7) Transfer of liquids.
(a) The content of tank motor vehicle containers shall be determined by weight, by suitable liquid level gaging devices, meters, or other approved methods.
Note: If the content of a container is to be determined by liquid level measurement, the container shall have a thermometer well so that the internal liquid temperature can be easily determined. This volume when converted to weight shall not exceed the filling density specified by the department of transportation regulations.
(b) Pumps or compressors shall be designed and installed in accordance with WAC 296-24-51009(12) and protected against physical damage when mounted upon ammonia tank trucks and trailers.
(c) Tank motor vehicles of greater than 3500 water gallons capacity shall be unloaded only at approved locations meeting the requirements of WAC 296-24-51009 (10)(c) and (12)(h).
(8) Electrical equipment and lighting. Tank trucks, tank trailers, and tank semi-trailers, may not be equipped with any artificial light other than electric light. Electric lighting circuits shall have suitable overcurrent protection (fuses or automatic circuit breakers). The wiring shall have sufficient carrying capacity and mechanical strength, and shall be suitably secured, insulated and protected against physical damage.
(9) Chock blocks. At least two chock blocks shall be provided. These blocks shall be placed to prevent rolling of the vehicle whenever it is parked during loading and unloading operations.
(10) Portable tanks (including skid tanks). When portable tanks are used in lieu of cargo tanks and are permanently mounted on tank motor vehicles for the transportation of ammonia, they shall comply with the requirements of WAC 296-24-51017. Where portable tanks, including those built to DOT Specification 51, 106A or 110A, are used for farm storage they shall comply with WAC 296-24-51011. When portable tanks are used as shipping containers in interstate commerce they shall comply with WAC 296-24-51015.
(11) Safety equipment.
(a) All tank trucks, trailers, and semi-trailers should be equipped with the following for emergency and rescue purposes:
(i) One full face gas mask with anhydrous ammonia refill canisters.
(ii) One pair of protective gloves made of rubber or other material impervious to ammonia.
(iii) Tight-fitting goggles or one full face shield.
(iv) A container of not less than five gallons of readily available clean water.
*An ammonia canister is effective for short periods of time in light concentrations of ammonia vapor, generally 15 minutes in concentrations of 3% and will not protect breathing in heavier concentrations. If ammonia vapors are detected when mask is applied the concentration is too high for safety. The life of a canister in service is controlled by the percentage of vapors to which it is exposed. Canisters must not be opened until ready for use and should be discarded after use. Unopened canisters may be guaranteed for as long as three years. All should be dated when received because of this limited life. In addition to this protection, an independently supplied air mask of the type used by fire departments may be used for severe emergencies.
[Statutory Authority: RCW 49.17.010, .040, .050. 99-17-094 (Order 99-01), § 296-24-51017, filed 08/17/99, effective 12/01/99. Statutory Authority: RCW 49.17.040, 49.17.050, 49.17.240, chapters 43.22 and 42.30 RCW. 80-17-015 (Order 80-21), § 296-24-51017, filed 11/13/80; Order 76-6, § 296-24-51017, filed 3/1/76; Order 73-5, § 296-24-51017, filed 5/9/73 and Order 73-4, § 296-24-51017, filed 5/7/73.]
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WAC 296-24-51019 Systems mounted on farm wagons (implements of husbandry) for the transportation of ammonia.
This section applies to containers of 3000 gallons capacity or less and pertinent equipment mounted on farm wagons (implements of husbandry) and used for the transportation of ammonia. All basic rules of WAC 296-24-51009 apply to this section unless otherwise noted.
(1) Design of containers. Containers shall be constructed in accordance with WAC 296-24-51009(2).
(2) Mounting containers.
(a) A suitable "stop" or "stops" shall be mounted on the farm wagon or on the container in such a way that the container shall not be dislodged from its mounting due to farm wagon coming to a sudden stop.
(b) A suitable "hold-down" device shall be provided which will anchor the container to the farm wagon at one or more places on each side of the container.
(c) When containers are mounted on four-wheel farm wagons, care shall be taken to insure that the weight is distributed evenly over both axles.
(d) When the cradle and the container are not welded together, suitable material shall be used between them to eliminate metal-to-metal friction.
(3) Container appurtenances.
(a) All containers shall be equipped with a fixed maximum liquid level gage.
(b) All containers with a capacity exceeding 250 gallons shall be equipped with a pressure gage having a dial graduated from 0-400 psi.
(c) The filling connection shall be fitted with combination back-pressure check valve and excess-flow valve; one double or two single back-pressure check valves; or a positive shut-off valve in conjunction with either an internal back-pressure check valve or an internal excess flow valve.
(d) All containers with a capacity exceeding 250 gallons shall be equipped for spray loading or with an approved vapor return valve.
(e) All vapor and liquid connections, except safety relief valves and those specifically exempt in WAC 296-24-51009 (6)(e), shall be equipped with approved excess flow valves or may be fitted with quick-closing internal valves which, except during operating periods, shall remain closed.
(f) Fittings shall be protected from physical damage by means of a rigid guard designed to withstand static loading in any direction equal to twice the weight of the container and lading using a safety factor of four based upon the ultimate strength of the material used. If the guard is fully enclosed, the safety relief valves shall be properly vented through the guard.
(g) If a liquid withdrawal line is installed in the bottom of a container, the connections thereto, including hose, shall not be lower than the lowest horizontal edge of the farm wagon axle.
(h) Both ends of the hose shall be made secure while in transit.
(4) Marking of container. There shall appear on each side and on the rear end of the container in letters at least four inches high, the words "anhydrous ammonia" or, "caution-ammonia" or the container shall be marked in accordance with department of transportation regulations.
(5) Farm wagons (implements of husbandry).
(a) Farm wagons (implements of husbandry) shall conform with state regulations.
(b) All farm wagons shall be securely attached to the vehicle drawing them by means of drawbars supplemented by suitable safety chains.
(c) A farm wagon shall be constructed so that it will follow substantially in the path of the towing vehicle and will prevent the towed farm wagon from whipping or swerving dangerously from side to side.
(d) All farm wagons shall have five gallons or more of readily available clean water.
[Order 73-5, § 296-24-51019, filed 5/9/73 and Order 73-4, § 296-24-51019, filed 5/7/73.]
WAC 296-24-51021 Systems mounted on farm equipment (implements of husbandry) for the application of ammonia.
This section applies to systems mounted on farm equipment and used for the field application of ammonia. All basic rules of WAC 296-24-51009 apply to this section unless otherwise noted.
(1) Design of containers. The minimum design for containers shall be in accordance with WAC 296-24-51009(2).
(2) Mounting of containers. All containers shall be securely mounted.
(3) Container valves and appurtenances.
(a) Each container shall have a fixed maximum liquid-level gage.
(b) The filling connection shall be fitted with combination back-pressure check valve and excess-flow valve; one double or two single back-pressure check valves; or a positive shut-off valve in conjunction with either an internal back-pressure check valve or an internal excess-flow valve.
(c) An excess-flow valve is not required in the vapor connection, provided the controlling orifice is not in excess of seven-sixteenths of an inch in diameter and the valve is hand-operated (attached hand wheel or equivalent) shut-off valve. To assist in filling applicator tanks, it is permissible to bleed vapors to the open air, providing the preceding requirements are met.
(d) Metering devices may be connected directly to the tank withdrawal valve. A union type connection is permissible between the tank valve and metering device. Remote mounting of metering devices is permissible using hose which meets with specifications set out in Appendix B. When the applicator tank is trailed and the metering device is remotely mounted, such as on the tractor tool bar, an automatic break-a-way type, self-closing, coupling must be used.
(e) No excess-flow valve is required in the liquid withdrawal line provided the controlling orifice between the contents of the container and the outlet of the shut-off valve (see WAC 296-24-51009 (6)(b)) does not exceed 7/16 inch in diameter.
appendix a
| Surface Area sq. ft. |
Flow Rate CFM Air |
| 20 |
258 |
| 25 |
310 |
| 30 |
360 |
| 35 |
408 |
| 40 |
455 |
| 45 |
501 |
| 50 |
547 |
| 55 |
591 |
| 60 |
635 |
| 65 |
678 |
| 70 |
720 |
| 75 |
762 |
| 80 |
804 |
| 85 |
845 |
| 90 |
885 |
| 95 |
925 |
| 100 |
965 |
| 105 |
1,010 |
| 110 |
1,050 |
| 115 |
1,090 |
| 120 |
1,120 |
| 125 |
1,160 |
| 130 |
1,200 |
| 135 |
1,240 |
| 140 |
1,280 |
| 145 |
1,310 |
| 150 |
1,350 |
| 155 |
1,390 |
| 160 |
1,420 |
| 165 |
1,460 |
| 170 |
1,500 |
| 175 |
1,530 |
| 180 |
1,570 |
| 185 |
1,600 |
| 190 |
1,640 |
| 195 |
1,670 |
| 200 |
1,710 |
| 210 |
1,780 |
| 220 |
1,850 |
| 230 |
1,920 |
| 240 |
1,980 |
| 250 |
2,050 |
| 260 |
2,120 |
| 270 |
2,180 |
| 280 |
2,250 |
| 290 |
2,320 |
| 300 |
2,380 |
| 310 |
2,450 |
| 320 |
2,510 |
| 330 |
2,570 |
| 340 |
2,640 |
| 350 |
2,700 |
| 360 |
2,760 |
| 370 |
2,830 |
| 380 |
2,890 |
| 390 |
2,950 |
| 400 |
3,010 |
| 450 |
3,320 |
| 500 |
3,620 |
| 550 |
3,910 |
| 600 |
4,200 |
| 650 |
4,480 |
| 700 |
4,760 |
| 750 |
5,040 |
| 800 |
5,300 |
| 850 |
5,590 |
| 900 |
5,850 |
| 950 |
6,120 |
| 1,000 |
6,380 |
| 1,050 |
6,640 |
| 1,100 |
6,900 |
| 1,150 |
7,160 |
| 1,200 |
7,410 |
| 1,250 |
7,660 |
| 1,300 |
7,910 |
| 1,350 |
8,160 |
| 1,400 |
8,410 |
| 1,450 |
8,650 |
| 1,500 |
8,900 |
| 1,550 |
9,140 |
| 1,600 |
9,380 |
| 1,650 |
9,620 |
| 1,700 |
9,860 |
| 1,750 |
10,090 |
| 1,800 |
10,330 |
| 1,850 |
10,560 |
| 1,900 |
10,800 |
| 1,950 |
11,030 |
| 2,000 |
11,260 |
| 2,050 |
11,490 |
| 2,100 |
11,720 |
| 2,150 |
11,950 |
| 2,200 |
12,180 |
| 2,250 |
12,400 |
| 2,300 |
12,630 |
| 2,350 |
12,850 |
| 2,400 |
13,080 |
| 2,450 |
13,300 |
| 2,500 |
13,520 |
Surface area = total outside surface area of container in square feet. When the surface area is not stamped on the name plate or when the marking is not legible, the area can be calculated by using one of the following formulas:
(1) Cylindrical container with hemispherical heads
Area = overall length in feet times outside diameter in feet times 3.1416.
(2) Cylindrical container with other than hemispherical heads
Area = (overall length in feet plus 0.3 outside diameter in feet) times outside diameter in feet times 3.1416.
(3) Spherical container
Area = outside diameter in feet squared times 3.1416.
Flow rate--CFM air = cubic feet per minute of air required at standard conditions, 60F and atmospheric pressure (14.7 psia).
The rate of discharge may be interpolated for intermediate values of surface area. For containers with total outside surface area greater that 2,500 sq. ft., the required flow rate can be calculated using the formula, flow rate CFM air = 22.11 A0.82 where A = outside surface area of the container in square feet.
APPENDIX B
TFI-RMA SPECIFICATION FOR ANHYDROUS AMMONIA HOSE
TFI-RMA STANDARD NO. M-5
(1) Scope. This specification covers hose and hose assemblies commonly referred to as "pressure transfer hose," used to convey anhydrous ammonia liquid or to convey anhydrous ammonia gas where the gas is in contact with liquid ammonia. This specification primarily covers hose and hose assemblies which have a minimum burst pressure of 1750 psig, a safety factor of 5, and a maximum working pressure of 350 psig. These figures should not be misconstrued to mean that they are the maximum pressures to which anhydrous ammonia hose and hose assemblies are built, since higher pressure hose and hose assemblies are available for special applications.
(2) Sizes and tolerances. Anhydrous ammonia hose shall be made with the following dimensions and tolerances:
Rubber Covered Hose For Use With
Two-Piece Screw Type Couplings
| I.D. |
Tolerance |
O.D. |
Tolerance |
| 1/2" |
± 1/32" |
15/16" |
± 1/32" |
| 3/4" |
± 1/32" |
1 1/4" |
± 1/32" |
| 1" |
± 1/16" |
1 1/2" |
± 1/16" |
Nonrubber Covered Hose and Rubber Covered Hose
For Use With Full Flow Couplings
| I.D. |
Tolerance |
0.D. |
Tolerance |
Nominal Tubing O.D. |
|
| 13/32" |
+.039" |
.015" |
49/64" |
± .031" |
1/2" |
| 1/2" |
+.047" |
.015" |
59/64" |
± .031" |
5/8" |
| 5/8" |
+.047" |
.015" |
1 5/64" |
± .031" |
3/4" |
| 7/8" |
+.047" |
.015" |
1 15/64" |
± .031" |
1" |
| 1 1/8" |
+ 0.62" |
.015" |
1 1/2" |
± .047" |
1 1/4" |
| 1 3/8" |
+0.62" |
.015" |
1/34" |
± .047" |
1 1/2" |
| 1 13/16" |
+0.62" |
.015" |
2 7/32" |
± .047" |
2" |
Hose For Use With Other Types of Couplings*
| I.D. |
Tolerance |
| 1/2" |
± 1/32" |
| 3/4" |
± 1/32" |
| 1" |
± 1/16" |
| 1 1/4" |
± 1/16" |
| 1 1/2" |
± 1/16" |
| 2" |
± 1/16" |
*The O.D. dimension and tolerance were intentionally omitted from this tabulation to provide for developments in both hose and couplings.
(3) Construction.
(a) Inner tube. The tube shall be uniform in quality and thickness and free from injurious defects. It shall meet the physical requirements of (4) of Appendix B. The material shall be resistant to hardening or other deterioration due to the action of ammonia.
(b) Reinforcement. The reinforcement shall consist of any material not adversely affected by permeating ammonia. The reinforcement shall be applied evenly and uniformly, and in such a way that it will meet the physical requirements of (4) of Appendix B. In constructions utilizing a ply or plies of wire reinforcement, the composition of the wire shall be a suitable corrosion resistant stainless steel.
(c) Cover. A rubber cover if used shall be uniform in quality and thickness and free from injurious defects. It shall meet the physical requirements of (4) of Appendix B. The cover shall be so compounded or constructed that it will not blister in service, and will be resistant to deterioration due to the action of ammonia. A gas tight cover shall be pricked to relieve pressure build-up between inner tube and cover. The cover shall be resistant to deterioration due to exposure to the elements.
(4) Physical tests.
(a) Tension test of tube and cover.
| Tube | Cover | |
| Tensile, psi. min. | 800 | 1200 |
| Elongation, percent, min. | 150 | 200 |
(b) Adhesion test
| Tube | Ply | Cover | |
| Adhesion lbs./in. | 10 | 8 | 10 |
(i) In constructions having braided wire or woven wire filler reinforcing members, only the cover adhesion requirement will apply, as it is impractical to prepare adhesion test specimens except for determining cover adhesion.
(c) Burst test. All sizes have a minimum burst of 1750 psig. (See scope.)
(d) Ammonia performance test. During the conditioning and flexing described in (7)(d) and (7)(d)(ii) of Appendix B there shall be no evidence of cover blistering or leakage. At the conclusion of the conditioning and at the conclusion of the flexing test, the burst must still meet the requirements of (4)(c) of Appendix B. There shall be no evidence of separation of the component parts when the remainder of the samples are examined.
(e) Low temperatures test. The hose shall not fail at minus 40F plus or minus 2°, when tested as described in (7)(e) of Appendix B.
(5) Types of tests.
(a) Acceptance inspection. This includes all the test specified, with the exception of the ammonia performance test.
(b) Qualification tests. The qualification tests are intended to establish that the hose is properly designed and constructed to give satisfactory service life. These tests shall be conducted by a recognized independent laboratory. The qualification tests shall consist of all the tests specified herein including the ammonia performance test.
(6) Method of sampling.
(a) Acceptance inspection. A 24-inch sample of each size and type hose, representative of the lot, shall be selected from each lot manufactured at one time, or from each 25,000 feet, whichever is smaller.
(b) Qualification test. In addition to the samples specified in (6)(a) of Appendix B, two 12-foot lengths of each size hose shall be selected for the ammonia performance test. Each new hose shall be subjected to a qualification test, and again whenever there has been a design change.
(7) Methods of testing.
(a) Tension test of tube and rubber cover. The tension test shall be made in accordance with ASTM D-380.
(b) Friction test. The friction test shall be made in accordance with ASTM D-380.
(c) Burst test. The burst test shall be made in accordance with ASTM D-380 using the method entitled "straight bursting test."
(d) Ammonia performance test. Two 12-foot lengths of hose, to be marked "A" and "B" shall be filled with liquid anhydrous ammonia by connecting to a tank and flushing out with ammonia to remove all the air. One end of each length shall be sealed and the other end left connected to the liquid space of a tank of anhydrous ammonia. The hose shall then be conditioned for 14 days at ambient temperature of 60 to 100F. A valve between the ammonia tank and the hose may be closed providing it is opened at least once each day to completely fill the hose with liquid anhydrous ammonia. The hose shall be examined each day for visible defects. There shall be no evidence of the cover blistering or perceptible leakage. If the hose is valved off at each end when liquid full, a hydrostatic relief valve should be provided between the block valves.
(i) Conditioned hose burst test. A 24-inch sample cut from hose marked "A" shall be subjected to a straight hydrostatic bursting test in accordance with (7)(c) of Appendix B.
(ii) Conditioned hose flexing test.
(A) The 12-foot hose length marked "B" shall be installed in flexing test machine (Fig. 1). One end of the hose is to be connected to the traveling block and the free end passed around two pulleys with diameters as shown in Table 1. A 30-pound weight shall then be attached to the free end.
(B) From the remainder of hose length marked "A", (sizes 1 inch and under only), cut a section to length indicated in Table 1. Connect one end to the vertically traveling block as shown in Fig. 1 and connect the other end to the liquid space of a tank of anhydrous ammonia. Maintain the temperature of hose and ammonia between 70F and 90F. The test on the feeder hose does not apply to sizes over 1 inch. To conduct the flex test on the larger sizes any convenient hose may be used as a feeder hose.
(C) The flexing test shall continue for 72 hours at a rate of approximately 470 cycles per hour with a 42-inch vertical movement of the traveling block. A valve between the ammonia tank and the hose may be closed providing it is opened at least once each day to pressurize the hose. The hose shall be examined each day for visible defect. There shall be no evidence of cover blistering or leakage.
(D) At the conclusion of the flexing period, cut a 24-inch sample from hose "A" and from hose "B" and subject each sample to a straight burst test in accordance with (7)(c) of Appendix B. All samples shall have a minimum burst of 1750 psig.
TABLE 1
| Hose Size |
Pulley Diameter |
Feeder Hose Length |
| 1/2" |
14" ± 1/4" |
36" |
| 3/4" |
14" ± 1/4" |
36" |
| 1" |
14" ± 1/4" |
36" |
| 1 1/4" |
15" ± 1/4" |
|
| 1 1/2" |
18" ± 1/4" |
|
| 2" |
24" ± 1/4" |
(E) Low temperature test. A straight piece of hose at least 24 inches long, conditioned to minus 40F plus or minus 2F for 5 hours, and bent 180° within two seconds around a mandrel 12 times the nominal inside diameter of the hose, shall not break or show cracks in the tube or cover.
(8) Retests and rejections. Any hose which fails in one or more tests may be resampled and retested, for which purpose two additional samples shall be selected from the hose for the test that failed to meet the requirements. Failure of either of the retested samples shall be cause for final rejection.
(9) Hose assemblies. The couplings must be so designed and constructed, that an assembly shall have sufficient strength that it will reach the minimum burst pressure, as required by (4)(c) of Appendix B, before the end fittings leak or come off when pressure is applied as specified in ASTM D-380 for hydrostatic tests. Fittings must be resistant to the action of anhydrous and aqueous ammonia and in no case may assemblies be supplied with copper alloy fittings.
(10) Markings. Hose shall be clearly marked at least once every five feet with manufacturer's name or trademark, "anhydrous ammonia," the maximum working pressure in psig, year of manufacturer, and "TFI-RMA Spec.," for all hose manufactured after January 1, 1964. As indicated in the scope, the maximum working pressure must not be less than 350 psig.
(11) Packaging.
(a) Packing. Unless otherwise specified, hose shall be packed in substantial commercial containers of the type, size and kind commonly used for the purpose, so constructed as to insure acceptance and safe delivery to common or other carriers, at the lowest rate, to the point of delivery specified on the order.
(b) Identification. Unless otherwise specified, shipping containers shall be marked with the size and quantity of hose therein, the name of the manufacturer, and the number of the order.
Figure 1
Figure 2
Typical Hose Flexing Machine
[Statutory Authority: RCW 49.17.040, 49.17.050, 49.17.240, chapters 43.22 and 42.30 RCW. 80-17-015 (Order [Statutory Authority: RCW 49.17.040, 49.17.050, 49.17.240, chapters 43.22 and 42.30 RCW. 80-17-015 (Order 80-21), § 296-24-51021, filed 11/13/80; Order 73-5, § 296-24-51021, filed 5/9/73 and Order 73-4, § 296-24-51021, filed 5/7/73.]
WAC 296-24-51099 Appendix C-Availability of reference material.
appendix c
availability of reference material
American National Standards Institute, Inc. (ANSI)
[formerly United States of America Standards Institute (USASI) formerly American Standards Association (ASA)]
11 West 42nd Street
New York, New York 10036
American Petroleum Institute (API)
1220 L Street Northwest
Washington, D.C. 20005
American Society of Mechanical Engineers (ASME)
345 East 47th Street
New York, New York 10017
American Society for Testing and Materials (ASTM)
1916 Race Street
Philadelphia, Pennsylvania 19103-1187
Bureau of Explosives*
50 "F" Street, N.W.
Washington, D.C. 20001
Compressed Gas Association, Incorporated (CGA)
1725 Jefferson Davis Highway
Arlington, Virginia 22202
The Fertilizer Institute (TFI) (formerly Agricultural Nitrogen Institute-National Plant Food Institute)
501 2nd Street Northeast
Washington, D.C. 20002
Chemical Manufacturers Association (CMA)
2501 "M" Street Northwest
Washington, D.C. 20037
National Fire Protection Association (NFPA)
Batterymarch Park
Quincy, Massachusetts 02269
Mine Safety and Health Administration
4015 Wilson Blvd.
Boston Towers, Number 3
Arlington, Virginia 22203
U.S. Government Printing Office*
North Capitol & "H" Streets Northwest
Washington, D.C. 20401
*DOT regulations available at nominal cost.
[Statutory Authority: Chapter 49.17 RCW. 94-15-096 (Order 94-07), § 296-24-51099, filed 7/20/94, effective 9/20/94; Order 76-6, § 296-24-51099, filed 3/1/76.]
