ANSI AWWA C110 - A21.10-21 PDF

Full title and description

ANSI/AWWA C110/A21.10-21 — Ductile‑Iron and Gray‑Iron Fittings, 3 in. through 48 in.: specification of materials, dimensions, pressure ratings, joint types (mechanical, flanged, push‑on where agreed), coatings/linings, markings, and acceptance testing for fittings used with ductile‑iron pipe for potable, reclaimed and wastewater service.

Abstract

This standard defines requirements for gray‑iron and ductile‑iron fittings in sizes 3 to 48 in. (76 to 1,219 mm) for water service, including mechanical‑joint and flanged fittings. It sets dimensional limits, working‑pressure ratings (typical ratings include 350 psi for many ductile‑iron mechanical‑joint fittings and 150/250 psi ranges for larger sizes or gray‑iron), options for fusion‑bonded epoxy and mortar linings, surge allowances and tables of ratings for each size and joint type.

General information

• Status: Current / Active (designated C110-21).
• Publication date: 2021 (designation suffix “-21”; distribution/availability listed by some providers January 4, 2022).
• Publisher: American Water Works Association (AWWA).
• ICS / categories: Pipes and fittings; relevant ICS classifications include 23.040.40 (metal fittings) and water supply systems categories.
• Edition / version: Edition C110/A21.10-21 (revises AWWA C110/A21.10-2012).
• Number of pages: 92 pages (typical published length for the 2021 edition).

Scope

The standard applies to gray‑iron and ductile‑iron fittings nominally 3 in. through 48 in. (76–1,219 mm) for use with ductile‑iron pipe in water distribution, reclaimed water and wastewater systems. It covers mechanical‑joint and flanged fittings (and may be used for push‑on or other joint types by agreement), specifies working‑pressure ratings and surge allowances, dimensional and material requirements, permitted linings and coatings (including fusion‑bonded epoxy options), marking, inspection, testing and delivery/acceptance provisions.

Key topics and requirements

• Size range and dimensional requirements for 3–48 in. fittings (tables of dimensions and ratings by size and joint type).
• Material specifications for ductile iron and gray iron, including chemical and mechanical property limits.
• Working‑pressure ratings and surge allowance rules (typical ratings 350, 250 or 150 psi depending on size and iron type).
• Joint types: mechanical joint, flanged joint, and provisions for push‑on or special joints by agreement.
• Coatings and linings (cement‑mortar, fusion‑bonded epoxy as manufacturer option) and protective coating requirements.
• Inspection, testing and acceptance criteria, plus required markings and documentation at delivery.
• Appendices addressing flange bolt/gasket guidance and special fittings considerations.

Typical use and users

Used by water utilities, municipal engineers, design consultants, pipeline contractors, manufacturers of ductile‑iron and gray‑iron fittings, procurement/specification writers and quality/inspection personnel to specify and verify fittings for potable water, reclaimed water and wastewater distribution systems.

Related standards

Commonly referenced and companion standards include ANSI/AWWA C111/A21.11 (rubber‑gasket joints), ANSI/AWWA C153/A21.53 (compact fittings), ANSI/AWWA C104/A21.4 (cement‑mortar lining), ANSI/AWWA C116/A21.16 (fusion‑bonded epoxy coatings), ANSI/AWWA C115/A21.15 (flanged pipe), ANSI/AWWA C150/A21.50 and C151/A21.51 (pipe design and manufacture), and installation guidance C600.

Keywords

ductile iron, gray iron, fittings, AWWA C110, A21.10, mechanical joint, flanged fitting, push‑on, working pressure, cement‑mortar lining, fusion‑bonded epoxy, water distribution, potable water, wastewater.

FAQ

Q: What is this standard?

A: ANSI/AWWA C110/A21.10-21 is the AWWA standard specifying materials, dimensions, pressure ratings and testing/acceptance requirements for ductile‑iron and gray‑iron fittings sized 3–48 in. for water service.

Q: What does it cover?

A: It covers dimensional and material requirements, working‑pressure ratings (with surge allowances), joint types (mechanical and flanged primarily), coatings/linings options, inspection and acceptance tests, marking and delivery requirements, plus tables of ratings by size.

Q: Who typically uses it?

A: Water utilities, engineers and designers, manufacturers of iron fittings, contractors and procurement/specification teams use this standard to ensure compatibility and performance of fittings in distribution and collection systems.

Q: Is it current or superseded?

A: The C110-21 edition is the current edition (revises the 2012 edition). Publications and distributors commonly list the document year as 2021 (with some distribution dates in early 2022); the standard is listed as active.

Q: Is it part of a series?

A: Yes — it is part of the ANSI/AWWA C100‑series of standards for ductile‑iron pipe and fittings and is commonly used alongside related AWWA standards such as C111, C153, C104, C116, C115, C150/C151 and C600.

Q: What are the key keywords?

A: ductile iron, gray iron, fittings, mechanical joint, flanged joint, working pressure, lining, coating, AWWA C110, ANSI A21.10.