ANSI MSS SP-114-2018

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ANSI/MSS SP-114-2018

Corrosion Resistant

Pipe Fittings,

Threaded and Socket-Welding,

Class 150 and 1000

Standard Practice

Developed and Approved by the

Manufacturers Standardization Society of the

Valve and Fittings Industry, Inc.

127 Park Street, NE

Vienna, Virginia 22180-4602

Phone: (703) 281-6613

Fax: (703) 281-6671

E-mail: standards@msshq.org

www.msshq.org

MSS STANDARD PRACTICE SP-114

This MSS Standard Practice was developed under the consensus of the MSS Technical Committee 108, Ferrous

Threaded Fittings, and the MSS Coordinating Committee. In addition, this Standard Practice was approved by an

ANSI/MSS Consensus Committee and ANSI as an American National Standard. The content of this Standard Practice

is the resulting efforts of knowledgeable and experienced industry volunteers to provide an effective, clear, and non-

exclusive standard that will benefit the industry as a whole. This MSS Standard Practice describes minimal

requirements and is intended as a basis for common practice by the manufacturer, the user, and the industry at large.

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 to this Standard Practice is established only by reference

in other documents such as a code, specification, sales contract, or public law, as applicable. MSS has no power, nor

does it undertake, to enforce or certify compliance with this document. Any certification or other statement of

compliance with the requirements of this Standard Practice shall not be attributable to MSS and is solely the

responsibility of the certifier or maker of the statement.

“Unless indicated otherwise within this MSS Standard Practice, other standards documents referenced to herein are

identified by the date of issue that was applicable to this Standard Practice at the date of approval of this MSS

Standard Practice (see Annex A). This Standard Practice shall remain silent on the validity of those other standards

of prior or subsequent dates of issue even though applicable provisions may not have changed.”

By publication of this Standard Practice, no position is taken with respect to the validity of any potential claim(s)

or of any patent rights in connection therewith. MSS shall not be held responsible for identifying any patent

rights. Users are expressly advised that determination of patent rights and the risk of infringement of such rights

are entirely their responsibility.

For all MSS Standard Practices, the term “shall” means “must” and “shall not” means “must not”.

In this Standard Practice, all text, notes, annexes, tables, figures, and references are construed to be

“normative” and essential to understand the standard’s message. All appendices, footnotes, or other

information denoted as “supplemental”, that may be included within this Standard Practice, DO NOT include

mandatory or normative requirements.

U.S. customary units in this Standard Practice are the standard. Combining or converting values between

the two systems may result in non-conformance with this Standard Practice.

This Standard Practice has been substantially revised from the previous 2007 edition. It is

suggested that if the user is interested in knowing what changes have been made, that direct

page by page comparison should be made of this document and that of the previous edition.

Non-toleranced dimensions in this Standard Practice are nominal unless otherwise specified.

Excerpts of this Standard Practice may be quoted with written permission. Credit lines should read ‘Extracted

from MSS SP-114-2018 with permission of the publisher, Manufacturers Standardization Society of the Valve

and Fittings Industry.'. Reproduction and/or electronic transmission or dissemination is prohibited under

Originally Approved: May 1995

Originally Published: July/August 1995

2018 Edition Approved by MSS: December 2015 (August 2018)

2018 Edition Approved by ANSI: November 2018

ANSI/MSS 2018 Edition Published: April 2019

MSS is a registered trademark of Manufacturers Standardization Society of the Valve and Fittings Industry, Inc.

Manufacturers Standardization Society

of the

Valve and Fittings Industry, Inc.

Printed in U.S.A.

MSS STANDARD PRACTICE SP-114

FOREWORD

This document established a standard for corrosion resistant pipe fittings, threaded and socket-welding. Class 150

and Class 1000, produced for a number of years by various manufacturers to somewhat different dimensions

although basically similar in principle.

These fittings were originally developed for use in the paper, food, pharmaceutical, distillery, sanitary, chemical,

petro-chemical, and other corrosive and high temperature industry environments. The original design of these

fittings was based on the dimensions of ASME B16.3, Malleable Iron Threaded Fittings.

This Standard Practice, originally approved May 1995, was revised in 2001 to include Class 150 and Class 1000

square head plugs, hex head plugs and bushings, locknuts, and threaded and socket-welding unions.

This 2018 edition contains revisions based on (1) MSS C-108 review, and (2) comments and recommendations

received during the original 2011 ANSI/MSS Consensus Committee approval process. In particular, the

committee approved the inclusion of hexagonal nipples, weld spuds, and union laying length dimensions in this

2018 revision, along with revised drawings, updated data where applicable, and various editorial changes.

In 2018, this revised MSS Standard Practice was subsequently ANSI-approved as a revised American National

Standard. This process involved an ANSI/MSS Consensus Committee that was composed of a diverse volunteer

group of industry stakeholders with a material interest in the topic of this Standard Practice.

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摘要：

本页详细介绍标准规范 ANSI MSS SP-114-2018，该标准由制造商标准化协会（MSS）发布，主要针对耐腐蚀合金材料制成的管道法兰和法兰配件。文档涵盖适用于化工、石油、海洋工程及高温高压环境的适用于镍基合金、不锈钢等特殊合金材料法兰的尺寸、公差、压力等级及标记要求。该标准旨在为管道系统提供可靠连接方案，确保法兰在腐蚀性介质和极端工况下的安全性能，是与ASME B16.5等通用法兰标准配套使用的行业关键基础规范。

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ANSI MSS SP-114-2018

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