About us

We are a private, non-profit association that for over 100 years has been developing, publishing and disseminating the standards of our life: the voluntary technical standards.

About us

About us Overview

Mission and values
In everything we do, we are always guided by a goal: to build, through standards, 'a world well made'.
Governance
Assembly, committees, colleges, councils, boards, President. To carry out its activities, UNI makes use of 8 specific governance bodies.
UNI in Europe and in the world
Standardisation, by its very nature, tends to eliminate any form of barrier, border, fence or division. Because the values underlying each standard are universal.

Our history
We have been in work for 100 years. Look back on the most important milestones of an ever-changing world.
Documents
Discover all the information and documents detailing the organisation and management of UNI.
Strategic Lines
The Strategic Lines are the confirmation of the design capacity of standardization as it has evolved in recent years: check the 2021-2024 document
Standardization

The voluntary technical standards are the greatest source of collective technical knowledge.
They help us every day to live in a world safer, fairer and in a more sustainable world.

Normazione

Standardisation Overview

Making a standard
Drafting a standard means writing a document that explains 'how to do guarantee well made things', while guaranteeing safety, performance and respect for the environment.
The benefits of standardisation
Economic growth, social progress, environmental protection, improvement of safety and enhancement of innovation.
The technical bodies
Committees, sub-committees and working groups: in UNI there are 1,100 technical bodies with which more than 8,000 experts collaborate.

Infrastructure for Quality Italy
UNI is an integral part of IQ, Infrastructure for Quality Italy. Objective? To improve the quality of 'Made in Italy' products, services and processes.
Innovation
Reference Practices, European projects and CWA: find out about UNI's activities and initiatives at national and international level

Projects in public Inquiry
Participate

UNI standards are not dropped from above.
They are the result of collective work of thinking, sharing and ideation.
Participation means contributing to the birth of new knowledge.

Participate

Participate Overview

Become a member
Contribute personally to the creation of standards and define the rules of your sector with us.
Public Inquiries
The standardisation process is transparent from start to finish thanks to two public Inquiries: preliminary and final.
UNI for you

Whether the company or institution you work for is small or large;
whether you are a teacher or a professional or a consumer, we always have the solution for YOU.

UNI for you

UNI for you Overview

Large companies
How standardisation can help large groups improve production quality, reduce costs and increase efficiency.
SMEs and start-ups
For small and medium-sized enterprises, standards are a great universe of benefits. Discover them all.
Professionals and VAT holders
Update knowledge, qualify, improve skills. Standardisation supports the growth of every professional.

Academia
Standards are an outstanding driver of change and a tool for updating, for those doing research or training.
Institutions
At local or national level, standardisation is a valuable ally of Institutions.
Consumers
End consumers, people, citizens. The main beneficiaries of standards are always us.

Non-regulated professions
Training

The great journey of UNI training

UNITRAIN is the UNI Training Centre for knowledge and application of standards.

It is aimed at technicians, managers, entrepreneurs, professionals and consultants who want to be kept up-to-date on standards practices, techniques and laws at the basis of their business.

Training

Training Overview

The UNITRAIN Trainers
UNITRAIN trainers are not just any trainers: most of them are also the experts who develop the standards.

Training courses
UNI Store

Welcome to UNI Store, the great online shopping for training.
Here you can search, purchase, consult and download standards, practices, publications, choose the subscription formula that suits you best and register for our training courses.

UNI Store

UNI store Overview

Technical Standards
A boundless patrimony of standards affecting all areas of our lives, to consult and purchase.
Reference Practices
Consult and discover the Reference Practice ("PdR") of the sector you are interested in.
Training courses
If you want to make a great journey in knowledge this is the station to start from: Consult the catalogue of UNITRAIN training courses scheduled and register for the one that suits you.

Publishing products
Standardisation also has its own library. Consult the list of available UNI editorial publications, which is enriched with new titles every year.
Subscriptions
We have designed different subscription formulas to meet everyone's needs. Discover yours.
Conventions
Discover all the Conventions stipulated at national level for access to the patrimony of standards of businesses and professionals.

EN ISO 182-4:2000

Name: EN ISO 182-4:2000
SKU: CEN11011966_OEN
Availability: OutOfStock

Plastics - Determination of the tendency of compounds and products based on vinyl chloride homopolymers and copolymers to evolve hydrogen chloride and any other acidic products at elevated temperatures - Part 4: Potentiometric method (ISO 182-4:1993)

Availability date: 20 September 2000

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Faq

Frequently asked questions

Go to the FAQ page

About us

About us Overview

Standardization

Standardisation Overview

Of interest

Participate

Participate Overview

UNI for you

UNI for you Overview

Of interest

Training

The great journey of UNI training

Training Overview

Of interest

UNI Store

UNI store Overview

EN ISO 182-4:2000

Faq

Frequently asked questions