Table of Contents

GENERAL RULES
1 SCOPE
2 GENERAL MARKING REQUIREMENTS
3 MANUFACTURER'S NAME OR TRADEMARK
4 RATING DESIGNATION
5 MATERIAL DESIGNATION
6 MELT IDENTIFICATION
7 VALVE TRIM IDENTIFICATION
8 SIZE DESIGNATION
9 IDENTIFICATION OF THREADED ENDS
10 RING-JOINT FACING IDENTIFICATION
11 PERMISSIBLE OMISSION OF MARKINGS
SPECIFIC RULES
12 MARKING REQUIREMENTS FOR FLANGES, FLANGED FITTINGS, AND
   FLANGED UNIONS
13 MARKING REQUIREMENTS FOR THREADED FITTINGS AND UNION NUTS
14 MARKING REQUIREMENTS FOR WELDING AND SOLDER JOINT FITTINGS
   AND UNIONS
15 MARKING REQUIREMENTS FOR NON-FERROUS VALVES
16 MARKING REQUIREMENTS FOR GRAY IRON VALVES
17 MARKING REQUIREMENTS FOR DUCTILE IRON VALVES
18 MARKING REQUIREMENTS FOR STEEL VALVES
ANNEX A - Reference Tables
ANNEX B - Marking Requirement Examples
ANNEX C - Referenced Standards and Applicable Dates

Abstract

Pertains to valves, fittings, flanges, and unions used in piping connections which include (but are not limited to) flanged, soldered, brazed, threaded, or welded joints.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	Manufacturers Standardisation Society
Pages
ISBN
Committee	TC 302
Superseded By	ANSI/MSS SP-25-2018