Welding Symbols Table 2. Supplementary Weld Symbols Machinery's Handbook, 31st Edition
1620
Weld all around
Backing or spacer material
Contour Flush Convex Concave
Field weld
Melt-thru
Specification, Process, or Other Designation: These are placed in the tail of the welding symbol and are in accordance with the American National Standard. They do not have to be used if a note is placed on the drawing indicating that the welding is to be done to some specification or that instructions are given elsewhere as to the welding procedure to be used. Letter Designations: American National Standard letter designations for welding and allied processes are shown in the table on page 1621. Further Information: For complete information concerning welding specification by the use of standard symbols, reference should be made to American National Standard ANSI/ AWS A2.4-2012, which may be obtained from either the American National Standards Institute or the American Welding Society listed below. Welding Codes, Rules, Regulations, and Specifications.— Codes recommending pro cedures for obtaining specified results in the welding of various structures have been estab lished by societies, institutes, bureaus, and associations, as well as state and federal departments. The latest codes, rules, etc., may be obtained from these agencies, whose names and ad- dresses are listed as follows: PV = Pressure Vessels; P = Piping; T = Tanks; SB = Structural and Bridges; S = Ships; AC = Aircraft Construction; and EWM = Electrical Welding Machinery. American Bureau of Shipping, ABS Plaza, 1701 City Plaza Drive, Spring, TX 77389, ww2.eagle.org. (S) American Institute of Steel Construction, 130 East Randolph, Suite 2000, Chicago, IL, 60601, www.aisc.org. (SB) American National Standards Institute, 25 W. 43rd Street, New York, NY 10036, www .ansi.org. (PV, P, EWM) American Petroleum Institute, 1220 L Street NW, Washington, DC 20005, www.api .org. (PV) American Society of Mechanical Engineers, 3 Park Avenue, New York, NY 10016, www.asme.org. (PV) American Welding Society, 8669 NW 36 Street, #130, Miami, FL 33166, www.aws.org. (T, S, SB, AC) Federal Aviation Administration, 800 Independence Avenue SW, Washington DC 20591, www.faa.gov. (AC) Insurance Services Office, 545 Washington Boulevard, Jersey City, NJ 07310, www .verisk.com/insurance/brands/iso. (PV) Lloyd’s Register of North America, 1330 Enclave Parkway, Suite 200, Houston, TX 77077, www.lrqausa.com. (S) Mechanical Contractors Association of America, 1385 Piccard Drive, Rockville, MD 20850, www.mcaa.org. (P) National Electrical Manufacturers Association, 1300 North 17th Street, Suite 900, Arlington, VA 22209, www.nema.org. (EWM) US Air Force, 1690 Air Force, Pentagon, Washington, DC 20330, www.af.mil. (AC) US Government Printing Office, 732 N. Capitol Street NW, Washington, DC 20401, www.gpo.gov. (PV) US Naval Facilities Engineering Command, 1322 Patterson Avenue SE, Suite 1000, Washington Navy Yard, Washington, DC 20374, www.navfac.navy.mil. (SB)
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