Technical 7.

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Codes, Standards and Specifications 2. A CL. 300 mild steel flange, valve or fitting manu-
factured from A515 Gr. 70, is good for 300 PSI at
Fabri-Valve continually keeps abreast of new standards approximately 840°F. At ambient temperature, it is
and/or revised standards through participation in MSS, good for 740 PSI. NOTE: It is very important that
ASME, ASTM, ANSI, NACE and AWS. Listed below are it is understood whether an ANSI class valve is
some of the more commonly used codes and standards, required or if a CWP valve may be utilized.
along with a brief summary of each. Example: CL. 150 or 150 PSI CWP.

ANSI American National Standards Institute (formerly ASA and USAS)

c. B16.10 Face-to-Face and End-to-End Dimensions
of Valves This standard is used by Fabri-Valve for
ASME American Society of Mechanical Engineers face-to-face and end-to-end dimensions on 2"-24"
ISO International Organization for Standardization wedge gate valves (Figure 71, 72 and 78) and check
MSS Manufacturers Standardization Society for the Valves & Fittings Industry valves (Figure 10 & 11).
ASTM American Society for Testing and Materials d. B16.34-Valves Flanged, Threaded, And Welding End
API American Petroleum Institute This standard covers fabricated valves, but: pro-
AWWA American Water Works Association scribes a minimum wall thickness that requires very
thick pressure walls – making valves more costly,
AISC American Institute of Steel Construction
requires flanged valves be class rated, restricts the
NACE National Association of Corrosion Engineers materials that can be used, and specifies a minimum
AWS American Welding Society weld efficiency factor which dictates spot x-ray of
DIN Deutsche Industrie Norm (Germany Industry Standard or Norm) pressure vessel welds.
SSPC Steel Structures Painting Council e. B16.47 Large Diameter Steel Flanges: NPS 26 Through
TAPPI Technical Association of the Pulp and Paper Industry NPS 60 This standard is used by Fabri-Valve for
BS British Standards flange bolting pattern dimensions for valves over
24" unless specified otherwise. Fabri-Valve standard
flange thicknesses do not match this standard, due
ANSI to pressure ratings.
a. B16.1 Cast Iron Pipe Flanges and Flanged Fittings f. B31.1 Power Piping Short section on valves, basically
(CL. 25, 125, 250, and 800.) CL. 25 and 125 lb. referring that B16.34 valves may be designed
to 96" size, CL. 250 lb. to 48" size. CL. 25 and CL. toB31.1 and may include proof-testing.
125 flange drilling matches B16.5, CL. 150 steel
flanges, except CL. 25 bolts are smaller. CL. 250 g. B31.3 Petroleum Refinery Piping Same as "F" (B31.1)
flange drilling matches B16.5, CL. 300 steel flanges. above.
When using valves between cast iron flanges, flat-
faced valve flanges or spacers should be used to ASME
prevent breaking the cast iron flanges. a. Section II-Material Specifications Usually closely
parallels ASTM specifications.
b. B16.5 Pipe Flanges and Flanged Fittings (CL. 150, 300,
etc.) to 24" size. b. Section VIII, Division 1-Pressure Vessels For unfired
pressure vessels.
This standard is used by Fabri-Valve for flange
Used as a guide in design of Fabri-Valves. Has charts
bolting pattern dimensions through 24" size unless
showing allowable stresses for various materials at
specified otherwise. Fabri-Valve standard flange
various temperatures (some to 1500°F). Establishes
thicknesses do not match this standard, due to
casting and joint welding efficiency factors depend-
pressure ratings.
ing on degree of non-destructive testing. Also has
This standard also contains pressure/temperature section on proof testing and design of flanges.
rating charts, which basically are as follows:
c. Section IX-Welding Qualifications Procedures for weld
1. A CL. 150 mild steel flange or fitting manufac- and welder qualifications for use in pressure vessels.
tured from A515 Gr. 70, is good for 150 PSI at Used as a guide for Fabri-Valve welders and welding
approximately 550°F. At ambient temperature, procedures.
it is good for 285 PSI. NOTE: Ambient is -20
to 100°F. Charts then give pressure ratings at
other temperatures up to 1000°F for various ISO
materials of construction. International organization to establish international
standards for items including valves.
MSS The Technical Society concerned exclusively with the
protection and performance of materials in corrosive envi-
SP-6 Finishes for Contact Faces of Connecting End
Flanges of Ferrous Valves and Fittings. ronments.
Std. MR-01-75-material requirements-materials for
SP-9 MSS Spot-Facing Standard. valves for resistance to sulfide stress cracking in produc-
tion and pipeline service.
SP-25 Standard Marking System for Valves, Fittings,
Flanges and Unions
AWS
SP-42 MSS 150 lb. Corrosion Resistant Cast The AWS structural welding code specify the nature
Flanged Valves (to 12" size) and size of acceptable discontinuities which may remain in
a particular type of welded structure for a specific
SP-44 MSS Steel Pipeline Flanges Formerly an service. The code usually requires the removal and repair
addition to ANSI B16.5 with additional of cracks, but permit limited amounts of some other
flange sizes. Now information included in discontinuities, particularly porosity.
ANSI B16.47

SP-61 Hydrostatic Testing of Steel Valves Covers DIN

wedge gate and check valves. Standards for flanges used in Germany and other parts
of Europe.
SP-67 Butterfly Valves DIN 2501-ND10 Flange Dimensions – superceded by
SP-81 Stainless Steel, Bonnetless, Flanged, Wafer DIN EN 1092-1 Flanges and their joints. Circular
Knife Gate Valves Fabri-Valve Figure C37 flanges for pipes, valves, fittings and accessories,
meets this standard. PN designated. Steel flanges

ASTM SSPC
Specifications for materials, including chemistry and a. SP-6 Commercial Blast Cleaning
physical properties. b. SP-10 Near-White Blast Cleaning

API TAPPI
a. API 595 Cast Iron Gate Valves TIS 405-8 and 405-20 Valve Standards for Pulp and
b. API 598 Valve Inspection and Test Paper Mills (Standard for Stainless Steel, Bonnetless,
Flanged Wafer Knife Gate Valves). Revoked by
c. API 600 Steel Gate Valves TAPPI, were same as MSS SP-81.

AWWA British Standards

a. C207 Standard for Steel Pipe Flanges This standard BS10 British Standard Flange
is used by Fabri-Valve for flange bolting pattern dimen-
sions greater than 60" size unless specified otherwise. BS EN 1092-1 Flanges and their joints. Circular flanges
Fabri-Valve standard flange thicknesses do not match for pipes, valves, fittings and accessories, PN desig-
this standard, due to pressure ratings. nated. Steel flanges

b. C504-Rubber Sealed Butterfly Valves

AISC
Steel Construction Manual. Used primarily for building
and bridge design, but can be and is used as a guide in
designing large, low-pressure valves and structural compo-
nents of all valves such as yokes.
NACE