SM . . . . . . . . . . Soft metal (lead, babbitt,
Systems may also be identified by their stencils and
copper, and so on)
color codes. You will find information on the
requirements for stenciling and color coding of pipes
CR 13 . . . . . . . . 13 percent chromium steel
and valves in the NSTM, chapter 505, and the General
CR 18 . . . . . . . . 18 percent chromium steel
Specifications for Ships of the United States Navy,
section 507. Table 15-2 gives you the color codes and
18 8 . . . . . . . . . 18-8 stainless steel
paint chip numbers, and table 15-3 is a list of the basic
18 8SMO . . . . . . 18-8 stainless steel with
color codes for valve handwheels for the systems with
molybdenum
which you will be involved.
18 8SCB . . . . . . . 18-8 stainless steel with
columbium
PACKING AND GASKET
MATERIALS
SH . . . . . . . . . . Surface-hardened steel
(Nitralloy, and so on)
Packing and gasket materials are required to seal
joints in steam, water, gas, air, oil, and other lines. They
Some examples of the MSS standard identification
are also used to seal connections that slide or rotate
marking symbols are given in figure 15-22.
3-INCH CAST STEEL SCREWED FITTING
2-INCH CAST IRON FLANGED FITTING FOR USE
SUITABLE FOR WATER, OIL, OR GAS SERVICE
IN REFRIGERATION SYSTEM:
AT 1000 PSI:
Manufacturer's identification . . . . . . A B CO
Manufacturer's identification . . . . . . A B CO
Service designation . . . . . . . . . . 1000 WOG
Service designation . . . . . . . . . . . 300 GL
Material designation . . . . . . . . . . STEEL
Temperature designation . . . . . . . . . 300F
Size . . . . . . . . . . . . . . . . . . . . 3
Size . . . . . . . . . . . . . . . . . . . . . 2
2-INCH BRONZE VALVE RECOMMENDED BY
AND VENT SERVICE:
THE MANUFACTURER FOR 200 PSI STEAM
SERVICE:
Manufacturer's identification . . . . . . A B CO
Manufacturer's identification . . . . . . A B CO
Service designation . . . . . . . . . . . D-W-V
Service designation . . . . . . . . . . . . . 200
Size . . . . . . . . . . . . . . . . . . . . . 2
4-INCH STEEL VALVE WITH 13 PERCENT CHROMIUM STEEL VALVE
STEM, DISK, AND SEAT, SUITABLE FOR 1500 PSI STEAM SERVICE AT
TEMPERATURE OF NO MORE THAN 850F:
VALVE BODY MARRING:
Manufacturer's identification . . . . . . . . . . A B CO
Service designation . . . . . . . . . . . . . . . . . 1500
Material designation . . . . . . . . . . . . . . . . STEEL
Size . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IDENTIFICATION PLATE MARRING:
Manufacturer's identification . . . . . . . . . . A B CO
Service designation . . . . . . . . . . . . . . . . . 1500
Limiting temperature . . . . . . . . . . . . . . MAX 850F
Body material designation . . . . . . . . . . . . STEEL
Valve stem material designation . . . . . . . . STEM CR 13
Valve disk material designation . . . . . . . . . DISC CR 13
Valve seat material designation . . . . . . . . . SEAT CR 13
Size . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Figure 15-22.--Examples of MSS standard identification markings for valves, fittings, flanges, and unions.
15-19