Astm f479 pdf free download

NOTE 3—For the safe use of materials in oxygen. Consequently, because ignition and physical or chemical properties may be conflicting for selecting a material, it may be necessary in such cases to perform component tests simulating the most probable ignition mechanisms e. For instance, a gasket material may have a relatively low ignition temperature hut he extremely resistant to ignition when confined between two steel flanges.

The presence of a small amount of an easily ignitable contaminant, such as a hydrocarbon oil or a grease film, can promote the ignition of the base material.

Accordingly, cleanliness is vital to minimize the risk of ignition 1. See also Practice G93 and Refs. Among the factors that affect whether tire will continue are the basic composition of the material, the presence of heat-sink effects, the pressure, the initial temperature, the geometric state of the matter, and whether there is oxygen available to sustain the reaction. Combustion may also be interrupted by the presence of a heat sink.

Damage—The material properties and system conditions that could affect the damage potential if ignition occurs should be taken into account when estimating the reaction effect in 7. Pressure and temperature are generally the most significant, and their effects show up in the estimate of ignition potential 5. ASTM G63 pdf download. Materials and Manufacture 5.

The screws shall be held for a suflicient time at temperature, then cooled at a rate sufficient to prevent precipitation of the carbide and provide the properties in accordance with Table I. The specific alloy used by the manufacturer shall he clearly identified on all certification required in the purchase order and shall have a chemical composition conforming to the limits specified in Table 2.

Mechanical Properties 7. The test torque values must be supplied by purchaser and agreed to by the supplier. Corrosion Resistance Requirements 8. Diniensions 9. Workmanship, Finish, and Appearance Defects originating on the periphery with a traverse indicating a potential to intersect are not permissible.

For peripheral discontinuities, the maximum depth may be 0. Number of Tests Additional tests of individual shipments of fasteners are not ordinarily necessary. A record of the individual heat of steel in each lot shall be maintained. The containers shall be coded to permit identification of the lot. ASTM F pdf download. The amount of contaminant on the test coupons is determined.

Nonmetallic material test coupons used as inserts, seats, seals, etc. SignifIcance and Use 5. A standard test coupon is described and a list of contaminants that have typically been found in oxygen- enriched systems and components is provided. This will permit direct comparison within and between test facilities. Apparatus 6. Other alloys that may be used if the specific alloy is unknown are included in Guide G The coupon configuration is shown in Fig.

NOTE 1—The surface finish of the test coupon should he the same as the part to be cleaned. Reagents 7.

Varning—Solvents such as 2-propanol hexane and 2-butanone are highly flammable. The reader should refer to appropriate safe handling procedures. Procedure 8. Determine the surface area to be contaminated S of each of the test coupons and record. Attach a handling wire through the hole at the top of each of the test coupons. The precleaning procedure shall be performed in an ultrasonic cleaner with the coupons immersed in type II reagent water for 10 mm.

Process a control coupon with the coupons to be contaminated for each cleaning agent to be evaluated. The coupons shall be dried and stored in a desiccator until needed. Determine the blank NVR values and particle counts on the solvents used to prepare the contaminating solutions as recommended in Practice F These values must be taken into account when preparing the standard contaminating solutions, especially when very dilute solutions are desired.

Rinse each coupon being prepared for contamination with the solvent to be used in the contaminant solution. Reweigh the test coupon at intervals, I h typically. Weigh, record the weight W1 in grams to the nearest 0. ASTM G pdf download. In-Service Care of Insulating Blankets. Terminology 3. Otherwise, it is, within the purposes of this definitions, uninsulated. Insulating covering of conductors is one means of making the conductor insulated. The nominal design voltage is equal to the phase-to-phase voltage on multiphase circuits.

The users of ASTM standards should reference appropriate industry consensus standards for proper work practices. The standards herein are to be considered as minimum requirements. Classification 5. Absorption or release of energy marks a transition in the specimen resulting in a corresponding baseline shift in the heating or cooling curve.

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No modification of this Agreement will be binding, unless in writing and signed by an authorized representative of each party. Assignment: Licensee may not assign or transfer its rights under this Agreement without the prior written permission of ASTM. We use cookies, including third party cookies, to provide you with the best possible browsing experience. If any of these conditions are found, blankets 5. Type I or Type II, shall incorporate a reinforcement. This 7. Safety Precautions for corona and ozone damage.

Electrical Tests maximum use voltage on which the blankets are used and the voltage at which they are retested. The relationship between 8. The retest voltage and maximum use voltage at which the blankets interval between date of issue and retests shall be based on shall be used is shown in Table 1. Inspection and Testing at an Electrical Testing Facility reason to suspect the electrical integrity of a blanket, an 7.

It is particularly important to 7. They may be washed 8. Mild household- either method may be selected for electrical testing. Failure to achieve this may result in excessive breakdown Blankets rms, maxA max max or damage.

The accuracy of the voltage Classes 1, 2, 3, and 4. The Class 0. The d-c test voltage shall be measured by a method circuit. It is recommended that the voltage be measured by the as indicated by the test equipment voltmeter, the test equipment use of a d-c meter connected in series with appropriate high shall be calibrated at least annually, in accordance with the voltage type resistors across the high voltage circuit, or by an latest revision of Practice D The crest factor may be electrostatic voltmeter of proper range.

The test equipment shall be calibrated at least annually, in 8. The test period shall start at the instant 8. The elec- trodes used in the proof test shall be designed to comply with 8. The edges and electrical stress uniformly over the test area to minimize corona corners of these plates should be rounded smoothly so as to and mechanical strain in the material. The electrodes used in eliminate sharp nicks, protuberances, and point sources that are the proof test shall be designed to comply with the flashover conducive to corona inception and lowered flashover voltage.

Rejection Criteria 2Rectangular metal sheets approximately in. The test voltage shall be applied continuously for tested when both electrodes are the same size. When an insulated table is not less than 1 min and not more than 3 min. This mask which has a 9. The blanket is placed over the ground electrode, snags, cracks, burns, corona cutting, or any obvious condition and a wet pad approximately the same size as the ground electrode, is that would adversely affect performance shall be rejected or placed on top of the blanket.

The wet pad is energized with the test repaired in accordance with Section This method will test a 30 by 30 in. D-C Retest, in. Repairs shall not be 1 3 76 3 76 made on top of previous repairs or on ozone or corona damage.

These clearances may be decreased if atmospheric condi- salvaged by severing the defective area from the undamaged tions permit. Table 2. Tape shall not be used to secure blankets for shipment or Field Care, Inspection, and Storage Defective They shall Recordkeeping and Product Marking cause to suspect any damage. They shall be inspected on both A date The product marking or other damaging substances as soon as practicable.

The The location shall be as free as possible from ozone, chemicals, oils, solvents, damaging vapors and Precision and Bias fumes, and away from electrical discharges and sunlight.