1、MIL-STD-Lb99B ND S 9999911 030432b L93 1 INCH-POUND I MIL-STD-l699B(YD) 17 July 1992 SUPERSEDING 24 May 1987 MIL-STD-l699A(YD) MILITARY STANDARD t v NONDESTRUCTIVE EVALUATION OF BUTT WELDS IN CRANE AND RAILROAD RAILS e e AMSC N4083 AREA NDTI roved for publi le , di tribu i r n is DISTRIBUTION STATEM
2、ENT A. A un1 imi ted . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-NAVAL FACILITIES ENGINEERING COMMAND ALEXANDRIA, VA 22332 NONDESTRUCTIVE EVALUATION OF BUTT WELDS IN CRANE AND RAILROAD RAILS 1. This military standard is approved by the Naval Fa
3、cil ties Eng neering Command (NAVFAC), and is mandatory for use by activities under the cognizance of NAVFAC, effective on the date of issue. U 2. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to:
4、 Commanding Officer (156), Naval Construction Battalion Center, 621 Pleasant Valley Road, Port Hueneme, CA 93043-4300, using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document, or by letter. 1 ii Provided by IHSNot for ResaleNo reproduction or netw
5、orking permitted without license from IHS-,-,-MIL-STD-Lb998 ND 9799911 0304328 Tbb MIL-STD-l699B(YD) Paragraph Figure 1. 1.1 2. 2.1 2.2 2.3 3. 3.1 3.2 3.3 3.4 3.5 3.6 4. 4.1 4.2 4.3 5. 5.1 5.2 5.3 6. 6.1 6.2 6.3 6.4 CONTENTS APPLICABLE DOCUMENTS - - - - - - - - - - 1 Government documents - - - - - -
6、 - - - 1 Non-Government publications - - - - - 1 Order of precedence - - - - - - - - - 2 GENERAL REQUIREMENTS - - - - - - - - - - 3 Method of inspection - - - - - - - - - 3 Equipment - - - - - - - - - - - - - - 4 Instrument adjustment procedure - - - 4 DETAILED REQUIREMENTS - - - - - - - - - 5 Proce
7、dure - - - - - - - - - - - - - - 5 Reporting and evaluation - - - - - - - 9 Acceptance/rejection criteria - - - - 9 10 Intended use - - - - - - - - - - - - - 10 Data requirements list and cross ref.- 10 NOTES - - - - - - - - - - - - - - - - Subject term (key word) listing - - - 10 Changes from previ
8、ous issue - - - - - 10 FIGURES iii Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-Lb99B ND 9999933 0304329 9T2 1. SCOPE 1.1 ScoDe. This procedure describes the requirements for the nondestructive evaluation of butt welds in crane and railroa
9、d rails using visual and ultrasonic inspection techniques. 2. APPLICABLE DOCUMENTS 2.1 Government documents 2.1.1 Standards. The following standard forms a part of this document to the extent specified herein. Unless otherwise specified, the issue of this document is that listed in the issue of the
10、Department of Defense Index of Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation (see 6.2). STANDARDS MILITARY MIL-STD-410 - Nondestructive Testing Personnel Qualifications and Certification. (Eddy Current, Liquid Penetrant, Magnetic Particle, Radiographic and U
11、ltrasonic). (Unless otherwise indicated, copies of military standards are available from the Standardization Documents Order Desk, Bldg. 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.) 2.1.2 Other Government Publications. The following other Government publication forms a part of this document
12、 to the extent specified herein. Unless otherwise specified, the issue is that cited in the solicitation. PUBLICATIONS NAVAL SEA SYSTEMS COMMAND NAVSHIPS 0900-LP-006-3010 - Hull Structure Production-Repair Welds Ultrasonic Inspection Procedure, Acceptance Standards for. (Copies of specifications, st
13、andards, handbooks, drawings, publications, and other Government documents required by contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting activity.) 2.2 Non-Government rmblications. The following document(s
14、) form a part of this document to the extent specified herein. Unless otherwise specified, the issues of the documents which are DoD adopted are those listed in the issue of the DODISS cited in the solicitation. Unless otherwise specified, the issues of documents not listed in the DODISS are the iss
15、ues of the documents which are current on the date of the solicitation (see 6.2). 1 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-l699B(YD) AMERICAN NATIONAL STANDARDS INSTITUTE, INC. (ANSI) ANSI B46.1 - Surface Texture. (Application for co
16、pies should be addressed to the American National Standards Institute, Inc., 11 West 42nd Street, New York, NY 10036.) AMERICAN SOCIETY FOR NONDESTRUCTIVE TESTING (ASNT) SNT-TC-1A - Nondestructive Test Personnel Qualification and Certification. (Application for copies should be addressed to the Amer
17、ican Society for Nondestructive Testing, 4153 Arlingate Plaza, Caller # 28518, Columbus, OH 43228. ) ASTM ASTM E164 - Ultrasonic Contact Examination of Weldments. (Application for copies should be addressed to ASTM, 1916 Race Street, Philadelphia, PA 19103.) AMERICAN WELDING SOCIETY (AWS) D1.l - Str
18、uctural Welding Code. (Application for copies should be addressed to the American Welding Society, 550 N.W. LeJeune Road, P.O. Box 351040, Miami, FL 33135.) (Non-Government standards and other publications are normally available from the organizations that prepare or distribute the documents. These
19、documents also may be available in or through libraries or other informational services.) 2.3 Order of mecedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes ap
20、plicable laws and regulations unless a specific exemption has been obtained. 3. DEFINITIONS 3.1 A-Scan. A method of data presentation utilizing a horizontal base line that indicates distance, or time, and a vertical deflection from the base line which indicates amplitude. 3.2 Search units. A device
21、incorporating one or more electro-acoustical devices for converting electrical energy into acoustical energy and vice versa. 3.3 CouDlant. A substance used between the search unit and test surface to permit or improve transmission of ultrasonic energy. 3.4 Shear wave. Wave motion in which the partic
22、le motion is perpendicular to the direction of propagation. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-LbSB ND m 999993L 0304333 550 m MIL-STD-l699B(YD) 3.5 Longitudinal wave. A compressional wave in which the particle motion is in the
23、 same d-rection as the propagation of the wave. 3.6 Roughness average (Rar. An approximation of the average roughness using the arithmetic average of the absolute values of the measured profile height deviations taken within the sampling length and measured from the graphical centerline. 4. GENERAL
24、REQUIREMENTS 4.1 Method of inwection. The ultrasonic inspection of rail butt welds shall be performed using the pulse-echo technique. Pulsed sound waves in the shear and longitudinal mode shall be introduced into the test material by coupled contact of the search unit(s), utilizing the manual scan t
25、echnique. The speed of scanning will be consistent with ordinary ultrasonic practices and further governed by surface conditions and the quality of the weld being tested. 4.1.1 Evaluation for acceptance. The longitudinal and shear wave methods described in Section 5 shall be employed when performing
26、 final evaluations for acceptance. 4.1.2 Wiiace condition. To allow for adequate scanning, the running surface and both sides of the head shall be free of weld spatter and extreme roughness. shall be flushed to provide a scanning surface that blends smoothly with the rail surfaces adjacent to the we
27、ld. The scanning surface condition shall be clean and free of all loose dirt, sand, rust, and scale for a distance of 4.50 times the height of rail on each side of the joint and shall have a finish of 250 microinch Ra or smoother in accordance with ANSI B46.1. The weld reinforcement on the running s
28、urface and sides of the head 4.1.3 -jerature. Final inspection for acceptance shall be performed at ambient temperature. However, tests shall not be performed at temperatures beyond the operational limits of the test equipment. 4.1.4 Insgection zone. The inspection zone for the rail butt weld shall
29、include the weld volume within the rail head, the web, and that portion of the base directly under the web (see figure 1). 4.1.5 measurement. Prior to the start of ultrasonic inspection, the inspector shall determine, by either ultrasonic or mechanical techniques, the rail height (labeled “T“ in fig
30、ure 2) and the rail head width (labeled “U“ in figure 3) of the rail under test. 4.1.6 ReDiIirs, Repaired weld areas shall be inspected in the same manner as the original weld. inspection zone as specified in 4.1.4. The extent of reinspection shall include the entire 4.1.7 mial insDection. Visually
31、inspect for cracks, incomplete welds, and satisfactory :cemoval of weld reinforcement and weld risers from the running surface and rail-head sides. 4.1.8 -3ector certification. Personnel performing visual and ultrasonic inspections to the requirements specified herein shall have a current certificat
32、ion in accordance with MIL-STD-410 or ASNT SNT-TC-lA, level II. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-Lb99B ND 9999911 0304332 497 I MIL-STD-l699B(YD) 4.1.9 Calibration. The ultrasonic test equipment (see 4.2) shall be calibrated
33、in accordance with the polar coordinate method as specified in ASTM E164. 4.2 Equipment. The ultrasonic equipment shall consist of the inspection instrument, search units, couplant, and accessories. The equipment package shall be capable of producing, receiving, amplifying, and displaying high-frequ
34、ency electrical pulses on the cathode-ray tube (CRT) at the required frequencies and energy levels. 4.2.1 Instrument. The instrument shall be of the pulse-echo type with an “A“ scan presentation and shall meet the equipment functional qualification requirements of NAVSHIPS 0900-LP-006-3010 or AWS D1
35、.l, section 6, part C. 4.2.2 Search units. The type of transducer(s) to be used shall be compatible with the test instrument. the intended application, as covered in the following paragraphs. The size and frequency are dependent on 4.2.2.1 Straight beam search. The transducer for the ultrasonic long
36、itudinal wave inspection shall be 1.0 inch diameter, with a nominal frequency of not less than 2.25 megahertz (MHz). 4.2.2.2 Anple beam search. The transducer(s) for shear wave inspection shall be 0.75 inch by 1.0 inch size, with a nominal frequency of not less than 2.25 MHz, and shall be affixed to
37、 suitable wedges that produce a refracted 45 degree shear wave (2 3 degrees) in the material under test. shall be such that when the dual search unit method is employed, the design will allow close proximity positioning of the search units (see figure 5). Wedge profiles 4.2.3 CouDlant. The couplant
38、selected shall be any suitable fluid that gives satisfactory results for the equipment in use and the surface conditions prevailing. 4.3 Instrument adiustment - Drocedure. 4.3.1 Longitudinal wave insDection. Place the search unit described in 4.2.2.1 on the rail running surface adjacent to the weld
39、deposit to be inspected, and adjust the instrument range and delay controls so that the reflected signal from the bottom of the rail is in the right-hand portion of the viewing screen. the reflection from the bottom surface is 80 percent of full screen height. Due to attenuation characteristics, add
40、itional instrument amplification may be necessary when the search unit is placed over the weld deposit. Adjust the instrument gain controls so that the amplitude of 4.3.2 Shear wave inspection (scanning from the running: surface). Attach a co-axial T-connector to the terminal on the instrument norma
41、lly used for single search unit operations. Select two of the search units as described in 4.2.2.2 and attach one to each side of the co-axial T-connector. allows both search units to transmit and receive simultaneously: This arrangement 4.3.2.1 Response adiustment (scanning from the running - surfa
42、ce). On a nonwelded portion of the rail running surface, position the two search units with their sound beams directed toward each other at a distance, between the sound exit points, equal to twice the height of the rail (2T). With sufficient 4 Provided by IHSNot for ResaleNo reproduction or network
43、ing permitted without license from IHS-,-,-RIL-STD-Lb99B ND - 9999911 0304333 323 instrument gain, a through-transmission signal will appear on the viewing screen. Using range and delay controls, position the signal to coincide with 40 percent of the distance across the viewing screen horizontal bas
44、eline. Increase the spacing of the search units to a distance of 4 times the height of the rail (4T) between sound exit points. through-transmission signal will appear on the viewing screen to the right of the 2T signal location and shall be positioned at 80 percent of the viewing screen horizontal
45、baseline. controls to ensure that the 2T and 4T signals are properly alined at these locations (see figure 2). and 4T distance positions on the running surface is essential and may require slight movement of the search units, i.e., lateral position and/or minor distance corrections. With sufficient
46、instrument gain a Repeat this procedure using the range and delay Obtaining maximum signal amplitudes at established 2T 4.3.2.2 in settinp (scanning from the runninp surface). Maximize the signal at the 2T location and adjust the signal amplitude to 80 percent of full screen height. The gain is subs
47、equently increased to 20 decibels (dB) to establish test sensitivity. The instrument is now adjusted to perform this inspection. 4.3.3 Shear wave inspection (scannine from sides of rail-headl. Attach a co-axial T-connector to the terminal on the instrument normally used for single search unit operat
48、ions. Select two of the search units as described in 4.2.2.2 and attach one to each side of the co-axial T-connector. allows both search units to transmit and receive simultaneously. This arrangement 4.3.3.1 Response adiustment (scanning from sides of rail-headl. On a nonwelded portion of the rail,
49、position the two search units on opposite sides of the rail head with their sound beams directed toward each other. The sound exit points shall be separated by a distance equal to the rail head width. With sufficient instrument gain, a through-transmission signal will appear on the viewing screen. Position this signal at the 40 percent (W) viewing screen horizontal baseline location. Reposition the two search units so they are facing each other
