SEMI F45 - Specification for Machined Stainless Steel Reducing Weld Fittings -

Member Price: $130.00
Non-Member Price: $170.00

Volume(s): Facilities
Language: English
Type: Single Standards Download (.pdf)
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Revision: SEMI F45-0307 (Reapproved 0818) - Current



This Standard was technically approved by the Facilities Global Technical Committee. This edition was approved for publication by the global Audits and Reviews Subcommittee on May 22, 2018. Available at and in August 2018; originally published June 1999; previously published August 2012.


The purpose of this Specification is to prevent confusion among the manufacturers of stainless steel reducing weld fittings, piping fabricators and end users and to standardize the dimensions of weld fittings.


This Specification applies to 6.35 mm (1/4 in.), 9.53 mm (3/8 in.) and 12.7 mm (1/2 in.); the machined stainless steel reducing weld fittings elbows and tees made for use in the semiconductor industry.


Referenced SEMI Standards


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