1、_ SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising there
2、from, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be revised, reaffirmed, stabilized, or cancelled. SAE invites your written comments and suggestions. Copyright 2017 SAE International All rights reserved. No part of this p
3、ublication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-497
4、0 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org SAE values your input. To provide feedback on this Technical Report, please visit http:/standards.sae.org/AIR1059E AEROSPACE INFORMATION REPORT AIR1059 REV. E Issued 1968-12 Reaffirmed 2008-11 Revised
5、2017-05 Superseding AIR1059D Oxygen Cylinder Quality, Serviceability, Maintenance Transfilling and Marking RATIONALE Update from Revision D to Revision E to mainly add UN ISO cylinders to the list of acceptable specifications. 1. SCOPE This document provides guidance concerning the maintenance and s
6、erviceability of oxygen cylinders beginning with the quality of oxygen that is required, supplemental oxygen information, handling and cleaning procedures, transfilling and marking of serviced oxygen assemblies. This document attempts to outline in a logical sequence oxygen quality, serviceability,
7、and maintenance of oxygen cylinders. Content of this document can also be used for refilling of oxygen cylinder while installed on aircraft, directly or through an intermediate charging port. 2. REFERENCES 2.1 Applicable Documents The following publications form a part of this document to the extent
8、 specified herein. The latest issue of SAE publications shall apply. The applicable issue of other publications shall be the issue in effect on the date of the purchase order. In the event of conflict between the text of this document and references cited herein, the text of this document takes prec
9、edence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 2.1.1 SAE Publications Available from SAE International, 400 Commonwealth Drive, Warrendale, PA 15096-0001, Tel: 877-606-7323 (inside USA and Canada) or +1 724-776-497
10、0 (outside USA), www.sae.org. AIR4071 Lubricants for Oxygen Use AIR5742 Packaging and Transportation of Oxygen Equipment ARP1176 Oxygen System and Component Cleaning AS8010 Aviators Breathing Oxygen Purity Standard SAE INTERNATIONAL AIR1059E Page 2 of 13 2.1.2 CGA Publications Available from CGA, 14
11、501 George Carter Way, Suite 103, Chantilly, VA 20151, Tel: 703-788-2700, . P-1 Standard for Safe Handling of Compressed Gases in Containers P-2.5 Standard for the transfilling of High Pressure Gaseous Oxygen Used for Respiration P-15 Filling of Industrial and Medical Nonflammable Compressed Gas Cyl
12、inders P-38 Guidelines for Devalving Cylinders C-6 Standards for Visual Inspection of Steel Compressed Gas Cylinders C-6.1 Standard for Visual Inspection of High Pressure Aluminum Alloy Compressed Gas Cylinders C-6.2 Standard for visual Inspection and Requalification of Fiber Reinforced High Pressur
13、e Cylinders V-1 Standards for Compressed Gas Cylinder Valve Outlet and Inlet Connections 2.1.3 ASTM Publications Available from ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959, Tel: 610-832-9585, www.astm.org. ASTM G63 Standard Guide for Evaluating Nonmetal
14、lic Materials for Oxygen Service ASTM G94 Standard Guide for Evaluating Metals for Oxygen Service 2.2 Related Publications The following publications are provided for information purposes only and are not a required part of this SAE Aerospace Technical Report. 2.2.1 U.S. Government Publications Copi
15、es of these documents are available online at http:/quicksearch.dla.mil. Any Applicable U.S. DOT Special Permits DOT-SP 8162 PHMSA (example of a special permit for structural composites) 49 CFR 180-209 Requirements for Requalification of Specification Cylinders 49 CFR 173.301 General Requirements fo
16、r Shipment of Compressed Gases and other Hazardous Material in Cylinders UN Pressure Receptacles and Spherical Pressure Vessels 49 CFR 173.302 Filling of cylinders with non-liquefied (permanent) compressed gases or absorbed gases OSHA 1910-253 Oxygen Fuel Gas Welding and Cutting MIL-PRF-27210 Aviato
17、rs Breathing Oxygen, Liquid and Gas MIL-PRF-25567 Leak Detection Compound, Oxygen Systems SAE INTERNATIONAL AIR1059E Page 3 of 13 3. INTRODUCTION Recharging of portable and fixed oxygen cylinders by the unauthorized user is a practice both condemned and discouraged by the Compressed Gas Association
18、(CGA) and the National Fire Protection Association (NFPA). Their condemnation is based on the firm conviction of the majority of the Association members that “transfilling” an oxygen cylinder by “unqualified” personnel is basically unsafe and must not be performed. In the United States the DOT regul
19、ations govern the ownership of the cylinder and authorization to fill it. In Canada, Transport Canada Transportation of Dangerous Goods Regulations control the filling of cylinders (refer to CGA pamphlet P-1). In other countries, other authorities and regulations may apply. All personnel assigned to
20、 transfilling must be trained and qualified in the inherent hazards of high pressure aviation oxygen and knowledgeable in this equipment. WARNING: Improper use, handling, or maintenance of oxygen equipment may result in serious injury or death. Oxygen equipment is to be serviced including transfilli
21、ng only in accordance with applicable written service procedures available from the original equipment manufacturer and in the case of transfilling in compliance with CGA Pamphlet P-2.5 and with local regulations. Only service technicians trained in the inherent hazards of high pressure aviation oxy
22、gen and knowledgeable in this equipment may service this equipment. Commercial airlines, aircraft manufacturers, and aircraft service stations have been involved in, and will continue to follow, the practice of filling the portable oxygen units and fixed oxygen cylinders in commercial and general av
23、iation. A standardized procedure should be established for charging high pressure oxygen cylinders in those aviation facilities which are required by circumstances to perform oxygen cylinder filling. This document starts with an overview of oxygen cylinder requirements. 4. OXYGEN COMPOSITION REQUIRE
24、MENTS 4.1 Oxygen Quality All oxygen gas purchased or manufactured for filling aviators breathing oxygen cylinders shall comply with aviators breathing oxygen per AS8010 or Military Specification MIL-PRF-27210. When oxygen is purchased for this purpose, the oxygen manufacturers delivery ticket shall
25、bear a certification that oxygen purity conforms to the above specifications and prescribed tests under the above specifications have been performed prior to delivery. Records of such delivery shall be maintained by the cylinder filler for a period of 5 years minimum. 4.2 Test Procedure Chemical tes
26、ts for various gas concentrations have evolved and been replaced by the use of calibrated gas analyzers and these are the preferred method due to ease of operation. The chemical methods are still an acceptable method and have been retained in this document for historical reference. All chemical test
27、s shall be made with analytical reagent grade chemicals and distilled water. Samples taken in accordance with Section 5 shall be tested: for purity, using a method approved by the procuring activity such as 4.3; for odor, in accordance with 4.5; for moisture, in accordance with 4.4; for pressure, in
28、 accordance with 4.6; and for leakage, in accordance with 4.8. 4.3 Purity Oxygen gas in serviced cylinders shall contain not less than 99.5% oxygen by volume, when tested. Samples taken for test shall be tested for conformance to AS8010 or MIL-PRF-27210. The test for oxygen concentration has evolved
29、 from chemical analysis to the use of calibrated oxygen analyzers. The use of an oxygen analyzer that has a certified calibration within due date is recommended as an acceptable means to determine the level of oxygen concentration. The chemical analysis method, while still an acceptable method of an
30、alysis, is provided as a historical reference. Place a sufficient quantity of mercury in a 100 cm3 calibrated gas measuring burette provided with a two-way stopcock and a two-way outlet, and properly connected with a liquid leveling tube. Connect one of the outlet tubes of the burette with a gas pip
31、ette of suitable capacity. Place in the pipette a coil of copper wire which extends to the uppermost portion of the bulb, and add about 125 cc of ammonium chloride-ammonium hydroxide test solution (made by mixing equal volumes of water and 27% concentrated ammonia; then saturate with ammonium chlori
32、de). Draw the liquid (free from air bubbles) through the capillary opening connection and stopcock opening in the burette by reducing the pressure in the burette tube and opening the stopcock controlling connection with the gas pipette. Then close the stopcock. SAE INTERNATIONAL AIR1059E Page 4 of 1
33、3 Having completely filled the burette, the other stopcock opening, and the other intake tube with mercury, draw into the burette exactly 100 cc of oxygen by reducing the pressure in the tube. Close the stopcock. Increase the pressure on the oxygen in the burette tube, and open the stopcock controll
34、ing the connection with the gas pipette. Force the entire volume of gas into the pipette. Close the stopcock, and rock the pipette gently, providing frequent contact of the liquid, gas, and copper spiral. At the end of 15 minutes most of the gas will have been absorbed by the liquid. At this time, t
35、o facilitate absorption of the last portion of the oxygen, draw some of the liquid into the burette tube, and force the residual gas back upon the surface of the liquid in the gas pipette. Again, rock the pipette until no further diminution in the volume of the gas occurs. Draw the residual gas, if
36、any, into the burette tube, and measure its volume. The volume of gas remaining undissolved shall not exceed 1/2 cc. The ammonium chloride-ammonium hydroxide solution should be used for leveling purposes if desired. 4.4 Moisture The moisture content shall be determined by use of an electrolytic type
37、 moisture meter or other method or equipment satisfactory for the purpose. The oxygen gas in serviced cylinders shall contain no more than 0.02 mg of water per liter of gas at 21 C (70 F) and 760 mm Hg (1 MPa or 1013 mbar). This level of moisture is equivalent to 25 ppm by volume or a -53 C (64 F) d
38、ew point. 4.5 Odor Each cylinder serviced as well as those selected as specified in Section 5 shall be subjected to the following test: The cylinder valve shall be slowly opened enough to allow a small amount of oxygen to flow. No smell should exist since pure oxygen is odorless and tasteless cylind
39、ers received for refill which have an odor present shall be visually inspected internally, cleaned and dried before filling (see 4.9). Filled cylinders having an odor shall be rejected. 4.6 Filling Pressure The cylinder shall be filled to the pressure at 21 C (70 F) as required by the markings on th
40、e cylinder or required by the equipment manufacturer and indicated by a decal, label, or other means. On steel cylinders the maximum filling pressure is stamped on the shoulder of the cylinder; as for example, DOT 3AA 1800 signifies a filling pressure of 1800 psig (12.4 MPa). On fully wrapped compos
41、ite cylinders the maximum filling pressure is marked on a label imbedded in the overwrap. For example, a marking such as DOT SP-XXXX 1850 signifies a filling pressure of 1850 psig (12.76 MPa). The actual cylinder pressure charge shall be determined by a calibrated lab type gauge with an accuracy of
42、5% of the filling pressure. NOTE: Cylinders should be refilled slowly enough (less than 1.4 MPa (200 psi) per minute as stated in CGA P-2.5 Paragraph 4.1.4.1 (b) to avoid heat of rapid recompression. Sufficient time must be allowed for the gas temperature to stabilize to 21 C (70 F) before checking
43、the pressure to avoid need to recheck pressure after cool-down of cylinder (1 MPa = 10 Bar). It is suggested that the operator consult with the cylinder manufacturer for safe maximum temperature ratings prior to any cylinder refill. 4.7 Pressure Gauge Accuracy Cylinders which have pressure gauges as
44、 an integral part of the valve assembly shall be tested as follows. Check that cylinder gauge reading is within 3448 hPa (50 psi) of the gauge reading on the refilling equipment. Inaccurate gauges should be replaced with gauges of the same equipment manufacturers part number. Only gauges marked “use
45、 no oil” which have been cleaned for oxygen service should be used. NOTE: On some cylinder assemblies incorporating an integral pressure reducer, a filler valve is used which has a pressure drop of 1724 hPa (25 psig) or higher psig. This type of assembly requires that the gauge be removed for test o
46、r an allowance be made for the pressure drop. SAE INTERNATIONAL AIR1059E Page 5 of 13 4.8 Leakage Each filled cylinder shall be tested for leakage. Various acceptable methods are available: - either by brushing an approved oxygen compatible leak check solution (see MIL-PRF-25567) over the cylinder a
47、nd all portions of the valve, - or by submerging in water the cylinder and those portions of the valve and gauge which will not be damaged by submersion, - or by checking pressure decay with time (if the cylinder is equipped with a pressure gauge or transducer and by giving caution to the measuremen
48、t accuracy and temperature correction due to ambient temperature variation), - or by weight loss measurement with time. Continued bubbling indicates leakage and is cause for rejection. This must be distinguished from bubbling caused by the escape of air entrapped in crevices and corners. Also, a tes
49、t shall be conducted with outlet capped and “valve opened.” Any leakage, visible within 5 minutes, around valve stem or packing gland is cause for rejection. If cylinder valve is equipped with a gauge, check for leakage at gauge-valve connection and in gauge body. Cylinders, and valves installed therein, shall not leak when tested as specified above. 4.9 Inspection, Cleaning and Drying Internal inspection, cle
