More E This practice is written so it can be specified on the engineering drawing, specification, or contract. It is not a detailed how-to procedure to be used by the inspector and, therefore, must be supplemented by a detailed procedure that conforms to the requirements of this practice. Specification E contains information to help develop detailed requirements. Scope 1.
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General Practices 3. Except as otherwise specified, the 6. The purchaser reserves the right to perform examination equipment shall be used.
When using a borescope, any of the examinations set forth in this practice where such the image viewed must have sufficient resolution to effectively examinations are deemed necessary to ensure that supplies and evaluate the indication. Light intensity shall be measured at the services conform to prescribed requirements.
In automated acceptability of components is to be evaluated. Engineering systems, where parts are dried by radiant heat and forced air, drawings or other applicable documents shall indicate the the travel speed of the system shall be such as to preclude acceptance criteria for the entire component; zoning may be overdrying of parts. The forced air does not have to be used. Examination on a sampling basis shall not be allowed recirculating but must preclude contamination of the parts.
The unless specifically permitted by the contract. All written procedures, including tech- 6. Materials not 6. As a minimum, the following information is required conforming to the requirements of AMS may be used either in individual procedures, specific technique sheets, or a only when a waiver is obtained from the cognizant engineering master procedure, or a combination thereof: organization.
If these operations are performed by LOX wetted surfaces that cannot be thoroughly post-cleaned. Reference Test Method E zant engineering organization when such materials do not meet for detailed cleaning methods and instructions. The examination materials including concentrations, application equipment shall meet all applicable national and local safety methods, dwell times, drying times, temperatures, and controls requirements as well as the requirements specified herein.
Reference Practice E for addi- be kept clean at all times. For visible dye examination, Type II, tional details. Black lights shall 6. If postcleaning is stamp, electronic ID or signature; and the date of examination. Reference Test Method E for additional details. Specific Practices Fig. Cleaning methods, including etching, be performed prior to treatments that can smear the surface but selected for a particular component shall be consistent with the not by themselves cause surface discontinuities.
Such treat- contaminants to be removed and shall not be detrimental to the ments include, but are not limited to, vapor blasting, deburring, component or its intended function. Perfor- 7. If etching is required, the parts shall be 6. The penetrant examination shall precede any paints, varnishes, scale, carbon, or other contaminants that are surface finish, such as anodize, except for inservice parts that not removable by solvent cleaning methods.
Warning— may be examined without removing the anodize. Caution should be exercised when using chemicals because 6. The sensitivity level shall be adequate for the intended purpose of the examination. This is not intended to prohibit the use of a Form f developer that has been qualified with a particular Type II system in accordance with AMS In addi- tion, Type II penetrant examination shall not be used prior to a Type I penetrant examination of the same surface.
All recorded results shall be identified, filed, and made available to the cognizant engineering organization upon request. Records shall provide for traceability to the specific part or lot inspected. Water temperature shall be maintained between 7. The be removed by a detergent or alkaline cleaner.
The surface shall not be formed when evidence exists that previous cleaning, surface flushed with water and the cloth or towel shall not be saturated treatments, or service usage has produced a surface condition with water. The component shall be examined under appropri- that degrades the effectiveness of penetrant examination. Etch- ate illumination to ensure adequate removal of the surface ing processes shall be developed and controlled to prevent penetrant.
The surface shall be dried by blotting with a clean, damage to the component under test. Etching is not required dry towel or cloth, or by evaporation. Etching is not throughout the wash operation. Water pressure and temperature and air pressure shall meet the etrant. Large components may be examined in sections. Pen- requirements specified in 7.
The component, 7. Maximum dwell times, unless otherwise specified, 7. For temperatures or as recommended by the manufacturer. It is recommended to rotate or otherwise background on the component. For dwell times greater than two 7. Dwell 7. Exam- manual wipe, or an air agitated immersion wash. Clean and reprocess those components with excessive pressure adequate to remove the penetrant shall be used but background. After rinsing, drain water from the component and shall not exceed 40 psi [ kPa].
When hydro-air nozzles are materials or filtered shop air at less than 25 psi [ kPa] to used the air pressure shall not exceed 25 psi [ kPa].
A prevent pooling. Caution shall be exercised to ensure that the coarse spray shall be used with a minimum distance of 12 in. If Washing shall be conducted under appropriate illumination.
If over-washing occurs, the component s shall be 7. After rinsing, drain water removed by first wiping the excess penetrant with a clean, from the component and utilize repositioning, suction, blotting lint-free, dry cloth or absorbent toweling. The remainder of the with clean absorbent materials, or filtered shop air at less than surface penetrant is then removed with a solvent-dampened 25 psi [ kPa] to prevent pooling in cavities, recesses, and lint-free cloth or towel.
The surface of the component shall not pockets. Warning—Over-removal of the surface penetrant be flushed with solvent and the cloth or towel shall not be shall require that the component be cleaned and reprocessed. A saturated with solvent. The component and cloth or toweling good indicator of over-wash or over-removal of the surface shall be observed under appropriate illumination to ensure penetrant is evidenced by the total lack of residue that may adequate removal of the surface penetrant.
Over-removal of the occur on all or a specific area of the part, see Test Method surface penetrant shall require the component to be cleaned and E Method C can that necessary to adequately dry the part. Components shall be also be used for water-washable penetrants using water or removed from the oven immediately after drying.
Components solvent for removal of excess penetrant. Type I penetrants 7. The rinse parameters of 7. Minimum and may be omitted. When developer is used, compo- sion, flowing, or spray.
Hydrophilic emulsifier shall not be nents that are not inspected before the maximum bleedout time applied by brush. Foaming application of hydrophilic emulsi- shall be cleaned and reprocessed. When developer is not used, fier is permissible when approved by the CEO.
Dry developer shall be applied in such a was qualified. Whatever the nominal concentration is em- manner as to contact all surfaces to be inspected. This includes the maximum concentration that the tapping or light air blow-off not exceeding 5 psi 34 kPa. While Minimum and maximum developer dwell times shall be 10 min immersed, the emulsifier or part should be mildly agitated. Dry developers shall not be used with Dwell time shall be the minimum required for adequate surface Type II penetrants.
Nonaqueous developer shall be applied by spraying. Spray applications may include fixed For Type I penetrants, the developer shall be applied as a spray nozzles, spray wands, pump sprayers, or spray bottles uniform thin coating over the entire surface to be inspected. Dwell time shall be the minimum required for entire surface to form a uniform, white coating to provide adequate surface penetrant removal, but unless otherwise suitable color contrast for the penetrant indications.
The approved by the cognizant engineering organization, shall not uniformity and thickness of the developer coating is important exceed two minutes per surface area. If the developer coating 7. The spray rinse parameters of 7. Unless otherwise specified, the minimum and 7. Evidence of over-removal shall maximum development times for nonaqueous developers are 10 min and 1 h respectively.
Excessive background may be removed by additional touchup applica- developer, the developer container shall be frequently agitated tion of the hydrophilic emulsifier provided its maximum between applications. Additional rinsing of the 7. If careful touch-up application of penetrants. Aqueous suspendable developers can be used with the hydrophilic emulsifier does not produce an acceptable both Type I and Type II penetrants.
Aqueous developers may.
ASTM E1417/E1417M - 16
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