mss-sp-112 (1999)

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STD-MSS

SP-112-ENGL li797 m

5 7 7 0 b 4 0

0501287 364 W

SP-112-1999

Quality Standard for Evaluation of Cast

Surface Finishes

Visual and Tactile Method

Standard Practice

Developed and A pproved by the

Manufacturers Standardization Society of the

Valve an d F ittings Industry, Inc.

127 Park Street,

N.E.

Vienna, Virginia 221

80

703)

281

-661

3

FittingsYRIGHT Manufacturers Standardization Society of the Valve and Fittingsensed by Information Handling Services

7/23/2019 MSS-SP-112 (1999)


STD-MSS

P L L Z E N G L w m

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5 7 ~ 0 ~ 4 05 0 1 a a

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MSS

STANDARD

PR CTICE SP-112

An MSS Standard Practice is intended as a basis for common practice by the manufacturer the user

and

he general

public. The existence of an MSS Standard Practice does not in itself preclude the manufacture, sale,

or

use of

products not conforming to the Standard Practice. Mandatory conformance is established only by reference in a

code, specification,

sales

contract, or public law, as applicable.

Unless otherwise specifically noted in this MSS SP, any standard referred to herein is identified by the date

of

issue

that w s applicable to the referenced standard s) at the date of issue of this

MSS

SP.

See

Annex A.)

In this Standard Practice all notes, annexes, tables, and figures

are

construed to be essential to the understanding of

the message of the standard, and are considered

part

of the text unless noted

as

“supplemental”. All appendices

appearing in this document are construed as “supplemental”. “Supplemental” information does not include manda-

tory requirements.

U.S.

customary units in this

SP

are the standard; the metric units are for reference only.

Substantive changes in this

1999

edition are “flagged” by

parallel

bars as

shown on the margins of this paragraph. The

specific detail of the change may bedetermined by comparing

I

he material flagged with that in the previous edition.

Non-toleranced Dimensions in this Standard Practice

are

nominal, and, unless otherwise specified, shall be consid-

ered ‘‘for reference only.”

Any

part

of

this standard

m a y

be quoted. Credit lines should read “Extractedfrom

MSS

SP-I

12

1999

with permis-

sion of the publisher the Manufacturers Standa rdization Society’ Reproduction prohibited under copyright conven-

tion unless written permission is granted

by

the Manufactures Standardization Society of the Valve and Fittings

Inàustty Inc.

Originally Approved January, 1993

Copyright@,1993 by

Manufacturers Standardization Society

of the

Valve and Fittings Industry, Inc.

Printed in U.S.A.

1

YRIGHT Manufacturers Standardization Society of the Valve and Fittingsensed by Information Handling Services

7/23/2019 MSS-SP-112 (1999)


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STD-ISS SP-112-ENGL

1999

M

5 7 7 0 b 4 0 0 5 0 3 2 8 9 1 3 7

MSS

STANDARD PRACTICE SP 112

One

of

the

MSS

Cast Surface Comparators,as described in Section 4 and Figure

1,

is included with the purchase

of

this written standard because it is

a

necessary

part

of the standard. AdditionalMSS Cast Surface Comparators may

be

purchased by writing

or

calling MSS at the following:


of

the Valve and Fittings Industry, Inc.

127 Park

Street, NE

Vienna, Virginia 221

80

Phone

No.

703)

281-6613

11


7/23/2019 MSS-SP-112 (1999)


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~

STDJ SS SP-512-ENGL 1 7 7 7 m

s n o b 4 0 o s o m o

7 5 7 rn

MSS

STANDARD

PR CTICE

SP-112

TABLE

OF

CONTENTS

SECTION

PAGE

TERMSAND

CONDITIONS

..................................................................................................................................................

i

FOREWORD

............................................................................................................................................................................ II

TABLEOF CONTENTS ...........................................................................................................................................................

111

O

PURPOSE

............................................................................................................................................................................

1

1. SCOPE

.................................................................................................................................................................................

1

2.

DEFLNITIONS

..................................................................................................................................................................... 1

3. CAST SURFACE FINISH ................................................................................................................................................... 2

4.

MSSCAST SURFACE COMPARATOR

............................................................................................................................ 2

5 . PROCEDURE ...................................................................................................................................................................... 2

6. ACCEPTANCE OR REJECTION .......................................................................................................................................

3

..

...

FIGURE 1:

MSS

Cast Surface Comparator .............................................................................................................................. 3

ANNEX

A:

Referenced

Standards and App licable Dates ..................................................................................................... 4

...

111


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STD-MSS SP-112-ENGL 1999 H 5 7 7 0 b 4 0 0501i91 8 9 5

MSS

STANDARD

PRACTICE

SP 112

OUALITY STANDARD

FOR

EVALUATION

OF

CAST

SURFACEFINISHE3

VISUAL AND TACTILE METHOD

PURPOSE

To establish

an

easy “sight and feel” method for the

quality evaluation of cast surface finishes.

To make available a Cast Surface Comparator with

MSS

surfacenumber through

10

to be used to mni-

tor surfacefinish by a visual and tactile

method.

To

provide guidance of surface finish by “sight and

feel’’

to minimize misunderstanding which may oc

cur between purchaser and manufacturer.

1.1 This

surface quality Standard Practice provides

criteria for the visual and tactile evaluation of

cleaned AS-CAST surface finishes of components

manufactured from castings.

1.2 This Standard Practice and its supporting MSS

Cast Surface Comparator

may

beapplied to surfaces

formed by any casting method.

1.3 This Standard Practice provides visualand tac-

tile criteria for evaluating casting surface finish and

texture which can be used to develop an acceptable

quality level.

1.4

Cast surfaces on materials such as gray iron,

ductile iron, bronze and malleableironmay

be

com-

pared with the use of this Standard Practice, how-

ever, it is not the intention to limit it to these type of

materials.

1.5

This Standard Practice does not apply to

ma

chined surfaces, or those surfaces that are intended

to machined.

1.6 This Standard Practice is limited to “sight and

feel” by comparison without measurement. Luster

and color are not part of this Standard Practice.

1.7 This Standard Practice is not intended for use

on those castings where bum-in, slag, scabs, etc. so

distort the surface that the comparator can not be

used and the casting may be rejected for other

causes.

2.

pEFINJTIONS

Refer to

A S E

B46.1-

SURFACETEXTURE

Sur-

face Roughness, Waviness, and Lay).

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STD-MSS S P - L I Z - E N G L

1999 5 7 7 0 b 4 0 0 5 0 1 2 9 2 721

MSS

STANDARD PRACTICE SP 112

3.

4

CAST SURFACE

FINIS

H

3.1 General: Therearemany methods of measuring

cast surface finishes to establish a criteria for quality

acceptance limits These are primarily by measure-

ment or pictures.

See

he references listed

in

Annex

A

of

this Standard

Practice for other inspection meth-

ods

3.2 Cast Surface finishes involve texture, roughness,

waviness, lay and flaws. For definitions and other

actual measurement methods for various surface ir-

regularities refer

to ASME B46.1

r any of the other

referend standards.

3.3 The casting

method

and

material used

will

in-

fluence the surface roughness. consideration must

be

given to the actual acceptable surface finish and

its final function. A mutual agreement should be

made

between purchaser and manufacturer.

3.4 The degree of roughness forms the criteria

of

this Standard Practice. Through the use of the

MSS

Cast Surface Comparator and its 10 three-dimen-

sionalsufaces,an acceptable cast surface finish can

be agreed upon.

Mss cAST SURFACE COMPARATOR

4 1 The MSS

Cast

Surface Comparator is an eco-

nomical, convenient “pocket size” Comparator for

inspectionand

quality

acceptance of cast surfacefm-

ishes.

4.2 The

MSS

CastSurfaceComparator was designed

and manufactured using actual representative

samples of cast surfaces. Numbers were then as

signed to establish the degreeof roughness.

4.3Neither

optical

magnifiers

nor

m u r in ginstru

ments are required to perform the surface

inspec-

tion. It is

a

visual and tactile method.

4.4

The

MSS

Cast Surface Comparator is a

three

dimensional representationofas-cast surfacefinishes

with numbers

1

through

10.

The surface texture

roughness of a surface which needs to bequalfied is

rated

by

means of comparison to theMSS Cast Sur-

face Comparator.

Visual

and tactile comparisons can

be made

by

using this Surface Comparator.

See

Fig-

ure 1 for illustrationof the MSS Cast Surface Com-

parator.

4.5 Casting surface roughness acceptance levels

can

be

established through the use

of

the

MSS

numbers

1 through 10 regardless of casting method andor

material.

A

comparison can

be

designated by an

acceptance

MSS

number andíor between numbers.

The lower the MSS number, the smoother.

5. PROCEDURE

5.1

General: The quality acceptance level should

be

established by prior agreement of the customer

and manufacturer and be based on the intended use

and function of the casting. Requirements for

some

areas of the castings

may be for

cosmetic appear-

ance, rather than function. The MSS number se-

lected

can

either

be

a maximum or

a

minimum. The

cast surface finish required can also be designated

between two

MSS

numbers.

It may be desirable to establish differentMSS num-

bers for differentareasof acasting. This is based

on

whether the entire

casting

should have the same gen-

eral surface smoothness requirement or if certain

areas

are more or less critical than

others.

2


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ST D*MSS SP-112-ENGL 1999 5 7 7 0 6 4 0 0 5 0 1 2 9 3 b b 8

MSS STANDARD PRACTICE

SP 112

5.2 Clean iness: The cast surîace to

be

inspected

should be clean and

fr

of dir t oil, loose sand or

otherforeign

materialthat

would

impair

an accurate

determinationof surface finish.

5.3

Surface Evaluation: Place the

MSS

Cast Sur-

face

Comparator

near

the surface to

be

inspected

By sightand eel compare the casting surface to the

surface

of

the quaiity acceptance level established

in

section5.1. Luster and color shouldnot bea consid-

emtion only roughness.

6. ACCEPTANCE OR

~-

TIOrq

Based on the surface evaluation in Section5 and

an

agreed upon surface roughness level, the cast part

shail

be

accepted or

rejected.

MSS

CAST

SURFACE CUMPARATOR

MANUFACTURERS STANDARDIZATION SOCIETY

FOR

USE

WITH MSS SP l i2

MSS

SURFACE

FINISH

NUMBERS

1 2 3 4

5

6 7 9 10

SMOOTH

ROUGH

DEGREE OF SURFACE FINISH

MATERIAL:

MOLDED

DURABLE PLASTIC

1/8” THICK - COLOR: GRAY

FIGURE 1

-

MSS CAST SURF CE COMPARATOR

{FOR VISUAL AND TACTILE INSPECTION

3


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STD-MSS

SP-312-ENGL 3999 W 5770640 0503294 5 T 4

MSS STANDARD PRACTICE SP 112

I

ANNEXA

I

REFE RENC E STANDARDS AND APPLICABLE DATES

This Annex is

an

ntegral part of this Standard Practice and is placed after the main text for convenience.

Standard Name or Description

ASME, ANSYASME. ANSI. ASMWANSI

B

46.1-1995

Surface Texture Surface Roughness, Waviness and Lay)

ASTM Suecifications for:

A802lA802M-89

Standard Practice for Steel Castings, Surface Acceptance Standards,

Visual Examination

SP-55-1996

Quality Standard for Steel Castings for Valves, Flange and Fittings and

Other Piping Components-Visual Method for Evaluation of Surface

Irregularities

SP-53-1995

Quality Standard for Steel Castings and Forgings for Valves, Flanges

and Fittings and other Piping Components-Magnetic Particle Examina-

tion Method.

SP-93- 1999

Quality Standard for Steel Castings and Forgings for Valves, Flanges

and Fittings and Other Piping Components-Liquid Penetrant Examina-

tion Method

Publications of the following organizations appear in the above list:

SME

The American Society of Mechanical Engineers

3

Park Ave., New York, NY

10016-5990

ASTM

American Society for Testing and Materials

100 Bar

Harbor

Drive, West Conshohoken, PA 19428-2959

MSS

Manufacturers Society of the Valve and Fittings Industry, Inc.

127 Park Street,

N.E.

Vienna, VA 22180

4


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STDmMSS SP-112-ENGL

1999

5 7 7 0 6 4 0 0501295

430 W

Number

SP-6-1996

SP-9-1997

SP-25-1998

SP-42-1999

SP-43-1991

SP-44-1996

SP-45-1998

SP-51-1991

SP-53-1999

SP-54-1999

SP-55-1996

SP-58-1993

SP-60-1999

SP-61-1999

SP-65-1999

SP-67-1995

SP-68-1997

SP-69-1996

SP-70-1998

SP-71-1997

SP-72-1999

SP-73-1991

SP-75-1998

SP-77-1995

sp-78-19ga

SP-79-1999a

SP-80-1997

SP-81-1995

SP-82-1992

SP-83-1995

SP-85-1994

SP-86-1997

SP-87-1991

SP-88-1993

SP-90-1986

SP-91-1992

SP-92-1999

SP-93-1999

SP-94-1999

SP-95-1999

SP-96-1996

SP-97-1995

SP-98-1996

sp-a9-1998

List of MSS Standard Practi ces

Price List Available Upon Request)

Standard Finishes for Contact Faces of Pipe Flanges and Connecting-End Flanges of Valves and Fittings

Spot Facing for Bronze, Iron and Steel Flanges

Standard Marking System For Valves, Fittings, Flanges and Unions

(R 95) Class 150 Corrosion Resistant Gate, Glove, Angle and CheckValves with Flanged and Butt Weld Ends

R

96) W rought Stainless Steel Butt-welding Fittings

Steel Pipeline Flanges

Bypass and Drain Connections

(R 95) Class 150LW Corrosion Resistant Cast Flanges and Flanged Fittings

Quality Standard for Steel Castings and Forgings for Valves, Flanges and Fittings and Other Piping Components Magnetic Particle Examination Method

Quality Standard for Steel Castings for Valves, Flanges, and Fittings and Other Pip ing Components Radiographic Examination Method

Quality Standard for Steel Castings for Valves, Flanges and Fittings and Other Piping Com ponents -Visua l Method for Eval. of Surface Irregularities

Pipe Hangers and Supports Materials, Design and Manufacture

Connecting Flange Joint Between Tapping Sleeves and Tapping Valves

PrecsureTesting of Steel Valves

High Pressure Chemical Industry Flanges andThreaded Stubs for Use with Lens Gaskets

Butterfly Valves

High Pressure Butterfly Valves with Offset Design

Pipe Hangers and Supports Selection and Application

Cast Iron Gate Valves, Flanged andThreaded Ends

Gray Iron Sw ing CheckValves, Flanged andThreaded Ends

Ball Valves with Flanged or Butt -weld ing Ends for General Service

(R 96) Brazing Joints for Wrought and Cast Copper Alloy Solder Joint Pressure Fittings

Specification for H igh Test Wrought But t Welding Fittings

Guidelines for Pipe Support Contractual Relationships

(R 92) Cast Iron Plug Valves, Flan ged andThreaded Ends

Socket-Welding Reducer Inserts

Bronze Gate, Globe, Angle and Check Valves

Stainless Steel, B onnetless, F langed, Knife Gate Valves

Valve Pressure Testing Methods

Class 3000 Steel Pipe Unions, Socket-Welding and Threaded

Cast Iron Globe L AngleValves, Flanged andThreaded Ends

Guidelines for Metric Data in Standards for Valves, Flanges, Fittings and Actuators

(R 96) Factory-Made Butt-welding Fittings for Class

1

Nuclear Piping Applications

Diaphragm Type Valves

Pipe Hangers and Suppo rts Fabrication and installation Practices

(R 91) Guidelines on Terminology for Pipe Hangers and Supports

(R 96) Guideline s for Manu al Operation of Valves

R 92) MSSValve User Guide

(R

92) Quality Standard for Steel Castings and Forgings forvalves, Flanges, and Fittings and Other Piping Components Liquid Penetrant Examination Methoc

Quality Std for Ferritic and Ma rtensitic Steel Castings for Valves, Flanges, and Fittings and Other Piping Components Ultrasonic Exam ination Method

(R

91) Swage (d) Nipples and Bull Plugs

Guidelines on Terminology for Valves and Fittings

Integrally Reinforce d Forged Branch Outlet Fittings Socket Welding,Threaded and Buttwelding Ends

Protective Coatings for the Interior of Valves, Hydrants, and Fittings

SP-99-1994 Instrumen t Valves

SP-100-1997 Qualification Requirem ents for Elastom er Diaphragm s for Nuclear Service DiaphragmTy pe Valves

SP-101-1989 Part-TurnValve Actuaior Attachment Flange and Driving Component Dimensions and Performance Characteristics

SP-102-1989 Multi-Turn Valve Actuator Attac hment - Flange and Driving Com ponent Dimensions and Performance Characteristics

SP-103-1995 Wrought Copper and Copper Alloy Insert Fittings for Polybutylene Systems

SP-104-1995 Wrough t Copper Solder Join t Pressure Fittin gs

SP-105-1996 Instrument Valves for Code Application s

SP-106-1990 (R 96) Cast Copper Alloy Flang es and Flanged Fittings, Class 125,150 and 300

SP-107-1991 Transition Un ion Fittings for Joining Metal and Plastic Products

SP-108-1996 Resilient-Sea ted Cast Iron-Eccentric Plug Valves

SP-109-1996 Welded Fabricated Copper Solder Join t Pressure Fittin gs

SP-110-1996 Ball ValvesT hreaded, Socke t-Welding, Solder Joint, Grooved and Flared Ends

SP-111-1996 Gray-Iron and Du ctile-Iron Tapping Sleeves

SP-112-1999 Quality Standard for Evaluation of Cast Surface Finishes -Visua l andTactile Method. This SP must be sold w ith a 10-surface,

three dim ens iona l Cast Surface Comparator, which is a necessary part of the Standard.

Additional Comparators may be sold separately at $19.00 each. Same quantit y disco unts apply on total order.

SP-113-1999 Connec ting Join t between Tapping Machines andTap ping Valves

SP-114-1995 Corrosion Resistant Pipe FittingsTh readed and Socket Welding, Class 150 and

1000

SP-115-1999 Excess Flow Valves for Natural Gas Service

SP-116-1996 Service Line Valves and Fittings for Drinking Water System s

SP- I 17-1996 Bellows Se als for Globe and Gate Valves

SP-118-1996 Comp act Steel Globe L Check Valves Flanged, Flangeless,Threaded &We ldin g Ends (Chemical & Petroleum Refinery Service)

SP-119-1996 Belled End Socket Welding Fittings, Stainless Steel and Copper Nickel

SP-120-1997 Flexible Graphite Packing System for Rising Stem Steel Valves (Design Requirem ents)

SP-121-1997 Qua lifica tion Testing M ethods for Stem Packing for Risin g Stem Steel Valves

SP-122-1997 Plastic Indust rial Bal l Valves

SP-123-1998 Non-Ferrous Threaded and Solder-Joint U nion s for Use With Copper Water Tube

(R-YEAR) Indicates year standard reaffirmed without substantive changes

A large number of former MSC Practices have been approved by the ANSI or ANSI Standards, published by others. In order to maintain a sin gle source of au thoritative

information, he MSC withdraws i ts Standard Practices n such cases.


of

the Valve and Fitt ings Industry, Inc.

127 Park Street, N.E.,Vienn a,VA 22180-4620 703) 281-6613 Fax 703) 281-6671

mss-sp-112 (1999)

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