ASME B29.21-2013 (2018) PDF

Full title and description

St ASME B29.21-2013 (R2018) — 700 Class Chains, Attachments, and Sprockets for Water and Sewage Treatment Plants. This standard specifies dimensions, strength data, attachment types and sprocket characteristics for 700-class chains used in water and sewage treatment applications, including cast iron, welded steel, stainless fabricated and nonmetallic chains and associated attachments and sprockets.

Abstract

This Standard provides designers and specifiers with dimensional tables, ultimate strength values, recommended measuring loads, and interchangeability limits for 700-class chains and their attachments and sprockets, enabling selection based on strength, wear life, corrosion resistance, weight, maintenance and cost considerations.

General information

• Status: Reaffirmation of the 2013 edition (R2018); later revised/reissued as ASME B29.21:2013(R2023).
• Publication date: Original edition 2013; reaffirmed (R2018) — published (reaffirmation) 17 August 2018.
• Publisher: American Society of Mechanical Engineers (ASME).
• ICS / categories: Mechanical systems and components for general use; manufacturing engineering; environment and health protection; testing and metrology (relevant ICS groupings for chain and sprocket standards).
• Edition / version: ASME B29.21-2013 (R2018) — designation indicates the 2013 standard reaffirmed in 2018.
• Number of pages: 28 pages.

Scope

Specifies dimensional requirements, strength and measuring loads, permissible clearances, attachment types (A42, F2, F22 variants, K2, M1, etc.), and sprocket geometry for 700 class chains intended for use in water and sewage treatment plant equipment. The standard is intended for designers, manufacturers and maintenance personnel who need interoperable chains and sprockets for treatment-plant conveyors and related handling equipment.

Key topics and requirements

• Dimensional tables for 700-class chain links and attachments.
• Ultimate strength and recommended measuring loads for chain length verification.
• Interchangeability limits and controlling dimensions for chain links and attachments.
• Chain clearance and sprocket geometry (pressure angle, pitch diameter, clearance circles, run-out limits).
• Specifications for materials: cast iron, welded steel, stainless steel fabricated and nonmetallic chains.

Typical use and users

Used by mechanical designers, equipment manufacturers, specifiers, procurement engineers and maintenance teams involved with conveyors, screenings, rake conveyors, sludge-handling equipment and other material-handling systems in water and sewage treatment plants where standardized 700-class chains and sprockets are required for reliable interchangeability and predictable service life.

Related standards

Part of the ASME B29 chain and power-transmission series; other related documents include ASME B29.1/B29.100 style chain standards and fatigue-testing standards for power transmission roller chain (ASME B29.26 and related B29-series publications). These documents address different classes of chains, test methods and fatigue-life evaluation used alongside B29.21 for design and verification.

Keywords

700 class chains; attachments; sprockets; water treatment; sewage treatment; chain dimensions; interchangeability; ASME B29.21; chain strength; sprocket geometry.

FAQ

Q: What is this standard?

A: ASME B29.21-2013 (R2018) is an ASME standard that defines dimensions, strengths, attachments and sprocket characteristics for 700-class chains used in water and sewage treatment plants.

Q: What does it cover?

A: It covers dimensional tables, ultimate strength values, measuring loads for checking chain length, permissible clearances, specific attachment types, sprocket geometry and tolerances needed for design, manufacture and maintenance of 700-class chain drives in treatment-plant applications.

Q: Who typically uses it?

A: Mechanical designers, equipment manufacturers, procurement/specification engineers and maintenance personnel in the water and wastewater industry, and OEMs producing conveyors and related handling equipment.

Q: Is it current or superseded?

A: The 2013 edition was reaffirmed in 2018 (R2018). A later reaffirmation/revision cycle produced ASME B29.21:2013(R2023); users should confirm whether they need the R2018 reaffirmation text or the latest R2023 revision for their application and procurement needs.

Q: Is it part of a series?

A: Yes — it is part of the ASME B29 series of standards covering chains and power transmission components; related numbered standards address other chain classes, testing and fatigue evaluation.

Q: What are the key keywords?

A: 700 class chains, attachments, sprockets, water treatment, sewage treatment, chain dimensions, interchangeability, ASME B29.21.