ISO 2852-1993 PDF

Full title and description

ISO 2852:1993 — Stainless steel clamp pipe couplings for the food industry. This International Standard specifies the design and dimensional requirements for clamp-type sanitary pipe couplings used in food, dairy and other hygienic process systems.

Abstract

Specifies dimensions, tolerances, surface roughness, materials, assembly and hygienic requirements for clamp liners and gaskets used in stainless‑steel clamp pipe couplings for the food industry. The clamps themselves are not standardized by this document, but suitable clearances and requirements for mating parts and sealing rings (liners/gaskets) are given; male parts and liners are intended for use with stainless steel tubes specified in ISO 2037.

General information

• Status: Withdrawn (withdrawal recorded in ISO lifecycle; commonly cited withdrawal date: 31 July 2018).
• Publication date: 17 June 1993 (Edition 2).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 67.260 — Plants and equipment for the food industry.
• Edition / version: Edition 2 (1993).
• Number of pages: 12 pages (typical published PDF/page count listed by national bodies and distributors).

Scope

Covers welded- and expanded-type clamp liners and gaskets for clamp pipe couplings intended for use in the food industry. The standard defines dimensional series, tolerances, surface-finish requirements and hygienic/assembly rules for the mating faces and sealing elements; it assumes the use of stainless steel tubing conforming to ISO 2037. The physical clamp pieces (the C‑shaped outer clamps) are not standardized by ISO 2852, though guidance on clearances and compatible mating parts is provided in the annex.

Key topics and requirements

• Dimensional series and tolerances for lip flanges and mating faces used in clamp couplings.
• Surface roughness and finish criteria for hygienic food-contact surfaces.
• Materials and mechanical requirements for male parts, liners and gaskets (stainless steel male parts intended for ISO 2037 tubing; elastomer/lining specification guidance).
• Assembly and hygienic requirements (cleanability, sealing arrangement, gasket seating).
• Annex A guidance on acceptable clearances; clamps themselves are left to suppliers and are not fully standardized within this document.

Typical use and users

Used by equipment manufacturers, pipe and fitting suppliers, dairy and food processing plants, breweries, pharmaceutical process engineers and maintenance teams where sanitary, easily disassembled pipe connections are required. In industry practice the coupling style defined in ISO 2852 is commonly referred to by trade names such as "Tri‑Clamp" or "Tri‑Clover" although those are manufacturer/brand terms compatible with the dimensional system in the standard.

Related standards

Key referenced standards include ISO 2037 (stainless steel tubes for the food industry) and related fittings standards such as ISO 2853 (stainless steel threaded couplings for the food industry). Other hygiene and equipment standards to consider when designing sanitary process systems include ASME BPE and regional 3‑A sanitary standards.

Keywords

ISO 2852, clamp coupling, sanitary fitting, Tri‑Clamp, Tri‑Clover, stainless steel, gasket, liner, food industry, hygienic piping, sanitary clamp.

FAQ

Q: What is this standard?

A: ISO 2852:1993 is an International Standard that defines dimensions, tolerances and hygienic requirements for stainless steel clamp pipe couplings (liners and gaskets) used in the food industry.

Q: What does it cover?

A: It covers welded and expanded clamp liners and sealing rings, mating face dimensions, surface finish requirements, materials and assembly/hygienic rules for clamp‑type sanitary couplings; the outer clamps themselves are not fully standardized but clearances are given.

Q: Who typically uses it?

A: Equipment manufacturers, sanitary‑piping suppliers, food/dairy processors, breweries, pharma process engineers and maintenance personnel who need hygienic, cleanable, quickly disassembled pipe connections.

Q: Is it current or superseded?

A: ISO 2852:1993 has been withdrawn by ISO (the standard lifecycle shows withdrawal; many national bodies list the withdrawal date as 31 July 2018). There is no direct replacement with the same number published by ISO; users should consult current national or international hygiene and piping standards (and manufacturer specifications) for up‑to‑date requirements.

Q: Is it part of a series?

A: It is related to other ISO fittings standards for the food industry (for example ISO 2853 for threaded couplings) and references ISO 2037 for stainless steel tubing; it sits within the family of standards covering plant and equipment for the food industry (ICS 67.260).

Q: What are the key keywords?

A: Sanitary clamp, tri‑clamp, gasket, liner, stainless steel tubing, hygienic piping, food industry fittings, ISO 2852.