Asme B16 48

These devices are cost-effective alternatives to isolation valves. What is a buttweld pipe fitting? The Standard applies to valves operated in a temperature environment between. The Standards Committee that approved the code or standard was balanced to ensure that individuals from competent and concerned interests have had an opportunity to participate. Scientific Online Calculator.

Dennis, Kerkau Manufacturing J. It includes requirements for welding bevels, for external and internal shaping of heavy-wall components, and for preparation of internal ends including dimensions and tolerances. This Standard covers ratings, overall dimensions, testing, tolerances, and markings for wrought carbon and alloy steel butt-welding short radius elbows and returns.

Frikken, Becht Engineering Co. The added materials of construction included additions to classes of alloy steels, stainless steels, and nickel alloys.

Asme b16.48 flange

In addition to renumbering of main text, updates have been made to the Materials section and Marking Method. Only emails and answers are saved in our archive. It includes any maximum temperature limitation or rule governing the use of material at low temperature.

What is the difference between ASME B ASME B Series A Serie

The Spacer is used when the line is required open and the Paddle Blind or Spade is installed when the line is required blocked or closed. Cuccio, Capitol Manufacturing Co. Reference Standards It is not considered practical to identify the specific edition of each standard and specification in the individual references. The listings with decimals do not imply precision measurement, such as use of vernier, micrometer, or electronic readout equipment. The web and its attachment outside diameter.

Your email address will not be published. For spades and ring spacers, holes on the hangers inform the staff.

Leave a Reply Cancel reply Your email address will not be published. As the disc is rotated, the flow is interrupted. We don't collect information from our users. The edition includes revisions to paragraph numbering and adjustments of appendices. This type is used in conjunction with ring joint gaskets.

The edition was also metricated over previous editions to include both U. Ratings are the maximum allowable U. The Standard covers minimum requirements for Class and cast ductile iron pipe flanges and flanged fittings. Testing at any higher Appendix I.

Schmidt, Hackney Ladish, Inc. Attending Committee Meetings. American Society for Testing and Materials this Standard. For other material metals.

This Standard covers induction bends for transportation and distribution piping applications e. Spade and Spacers are normally referred to as Line Blinds. Approved revisions will be published periodically. For larger sizes Spectacle Blinds can be very bulky and occupy a lot of space so Spades and Spacers are preferred. Barnes, Anric Enterprises, Inc.

Cheta, Royal Dutch Shell D. This is when two separate devices are used, as they do not require rotation to be installed. Refer to Mandatory Appendix I. Special Fittings Special fittings here refers to special sizes, forms and tolerances that agreed between buyer and manufacturer. Customary units in dimensional tables in Nonmandatory Appendix A.

Aluminum, Titanium, Nickel, and alloy. Cheta, Royal Dutch Shell M. More From Ramesh Krishnan. The smaller bolt circle diameter results in less flange movement after installation.

This Standard provides for a fixed position for the welding ends with reference to either the centerline of the fittings or the overall dimensions. Generally, flange factories are also spectacle blind manufacturers. Zaidi, Jacobs Engineering Group, Inc.

Including elbow, tee, cross, cap, reducer, and etc. No part of this document may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher. The request for interpretation should be clear and unambiguous. When the specifications of the pipe fitting are all not allowed to mark, the identification mark may be omitted in the reverse order. When using the steel stamp, it should not too deep or too sharp cause cracking or to reduce the wall thickness to less than the minimum allowance of wall thickness.

Line Blanks

To blind the pipeline, and interrupt the flow, the site staff has simply to unscrew the flange bolts and rotate the spectacle blind to its closed position. Because this is a semi-permanent isolation it is very safe and safety is often the mentality behind the use of a Spade and Spacer in maintenance operations. For smaller Spades and Spacers it is common for the Spacer to have a hole in the handle and the Spade or Paddle blind to have no hole. Fabricated Fittings Fabricated laterals and other fittings by circumferential or intersection welds are considered pipe fabrication could not apply this standard. The term wrought denotes fittings made of pipe, tubing, plate, or forgings.

The latest version provides dimensions and ratings in both metric and inch units. Details of preparation for any backing ring must be specified in ordering the component.

ASME B Specificaton for Butt Welded Fittings - Octal Pipe Fittings

Mechanical Engineering

Requests that are not in this format will be rewritten in this format by the Committee prior to being answered, which may inadvertently change the intent of the original request. Certain requirements also pertain to wrought or cast plugs, bushings, couplings, and caps. Requirements and recommendations regarding bolting and gaskets are also included. Appleton, Alloy Stainless Products Co. This type fits semi-metallic gaskets, as the spiral wound type.

The tables and figures included in this Mandatory Appendix provide dimensional data in U. There will be no addenda issued to this edition. Where adjacent openings in fittings are not in parallel planes, they shall be joined by a circular arc or radius on the external surfaces. The handle protrudes from the pipe and provides an indicator of whether a Spade or Spacer is installed.

Mechanical Engineering


Coverage includes preparation for joints with the following. Two very important flanges such as weld neck flange and blind flanges are very commonly used in piping systems. It provides requirements for fitting ends suitable for soldering. The Standard is limited to flanges and flanged fittings made from cast or forged materials, and blind flanges and certain reducing flanges made from cast, forged, daag movie all songs mp3 or plate materials.


Ramakrishnan, Forged Vessel Connections W. Wafer or flange-less valves, bolted or through-bolt types, that are installed between flanges or against a flange shall be treated as flanged end valves. Where given for the fittings, the minimum and maximum dimensions are based on these tolerances. The difference is that spectacle blinds may need some space to be rotated, and this space is not always available due to the routing of the piping system. It is generally used in conjunction with a paddle spacer in large sizes.

ASME B Specificaton for Butt Welded Fittings - Octal Pipe Fittings