ISO 6743-12:1989 PDF

Lubricants, industrial oils and related products (class L) — Classification — Part 12: Family Q (Heat transfer fluids)

Open preview (PDF)

Title (English):

ISO 6743-12:1989

Lubricants, industrial oils and related products (class L) — Classification — Part 12: Family Q (Heat transfer fluids)

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 2
Publication date:: October 19, 1989
Edition:: ISO IS 6743 edition 1 version 1
ICS:: 75.100

Delivery type:

Full version25 €Read online 24h10 €Read online 72h15 €

Document language:

enru

Delivery time:Immediate download

Price:25 €

Description (English):

Defines the categories of products required for the main applications of this family. In the detailed classification shown in the table products are designated in a uniform manner either in complete in an abbreviated form. Should be read in conjunction with ISO 6743-0.

Technical details

Technical committee: ISO/TC 28/SC 4 - Classifications and specifications
SKU: ISO 6743-12:1989

Abstract

Overview

ISO 6743-12:1989 specifies the classification of heat transfer fluids within the broader ISO 6743 family for lubricants, industrial oils and related products (class L). It defines product categories (Family Q) and a uniform designation system for fluids used in heat transfer applications. The standard is intended to be read together with ISO 6743-0 (general rules) and uses viscosity grades defined in ISO 3448.

Key topics and requirements

Category coding: Each product is given a two‑letter code starting with “Q” (e.g., QA, QB). The second letter identifies the specific category; the pair forms a standard code for the fluid family.
Temperature- and system-based categories: Categories in the detailed classification address typical operating conditions and system types:
- Q A - Open-circuit heat transfer fluids; bulk temperature up to <250 °C; fire risk and open container considerations.
- Q B - Closed-circuit fluids for general heat transfer; bulk temperature up to <300 °C.
- Q C - Closed-circuit fluids with forced circulation for higher temperatures >300 °C and <320 °C; systems require filtration and circulation.
- Q D - Synthetic fluids for particularly high temperatures (bulk measured with forced circulation >320 °C).
- Q E - Cooling circuits where fluid must perform at low temperatures **> −30 °C and

Related standards

Standards mentioned in the description

ISO 6743-12:1989 PDF

Technical details

Abstract

Overview

Key topics and requirements

Related standards

Abstract

Overview

Key topics and requirements

Related standards

Lubricants, industrial oils and related products (class L). Classification - Family X (Greases)

Lubricants, industrial oils and related products (class L) — Classification — Part 0: General

Industrial liquid lubricants — ISO viscosity classification