1.

Notifying Member: UGANDA

If applicable, name of local government involved (Article 3.2 and 7.2):

2.

Agency responsible:

Uganda National Bureau of Standards

Plot 2-12 ByPass Link, Bweyogerere Industrial and Business Park

P.O. Box 6329

Kampala, Uganda

Tel: +(256) 4 1733 3250/1/2

Fax: +(256) 4 1428 6123

E-mail: info@unbs.go.ug

Website: https://www.unbs.go.ug

Name and address (including telephone and fax numbers, email and website addresses, if available) of agency or authority designated to handle comments regarding the notification shall be indicated if different from above:

3.

Notified under Article 2.9.2 [X], 2.10.1 [ ], 5.6.2 [X], 5.7.1 [ ], 3.2 [ ], 7.2 [ ], other:

4.

Products covered (HS or CCCN where applicable, otherwise national tariff heading. ICS numbers may be provided in addition, where applicable): Flexible tubes, pipes and hoses, and fittings therefor, of plastics, burst pressure >= 27,6 MPa (HS code(s): 391731); Pipeline components and pipelines (ICS code(s): 23.040)

5.

Title, number of pages and language(s) of the notified document: DUS 945-1:2024, pre-insulated flexible pipe systems — Part 1: Classification, general requirements and methods of test, Second Edition.; (30 page(s), in English)

6.

Description of content: This Draft Uganda Standard specifies the classification, general requirements and methods of test for flexible, preinsulated, directly buried district heating pipe systems. Depending on the pipe assembly (see Table 4), this standard can be used for maximum operating temperatures of 95 °C to 140 °C and operating pressures of 6 bars to 25 bars. The pipe systems are designed for a lifetime of 30 years. For pipe systems with plastic service pipes, the respective temperature profiles are defined in US 945-2.

NOTE For the transport of other liquids, for example potable water, additional requirements may be applicable.

7.

Objective and rationale, including the nature of urgent problems where applicable: Prevention of deceptive practices and consumer protection; Protection of human health or safety; Protection of the environment; Quality requirements; Harmonization; Reducing trade barriers and facilitating trade

8.

Relevant documents:

1._    IEC 60811- 4, Assessment of carbon black dispersion in polyethylene using a microscope

2._    ISO 6964, Polyolefin pipes and fittings — Determination of carbon black content by calcination and pyrolysis — Test method and basic specification

3._    ISO 8497, Thermal insulation — Determination of steady-state thermal transmission properties of thermal insulation for circular pipes

4._    ISO 9967, Thermoplastics pipes — Determination of creep ratio

5._    ISO 9969, Thermoplastics pipes — Determination of ring stiffness

6._    ISO 10508; Plastics piping systems for hot and cold water installations — Guidance for classification and design

7._    ISO 16770, Plastics — Determination of environmental stress cracking (ESC) of polyethylene — Full-notch creep test (FNCT)

8._    ISO 16871, Plastics piping and ducting systems — Plastics pipes and fittings — Method for exposure to direct (natural) weathering

9._    ISO 21003-1; Multilayer piping systems for hot and cold water installations inside buildings — Part 1: General

10._  ISO 23993, Thermal insulation products for building equipment and industrial installations — Determination of design thermal conductivity

11._  US 482-1, High Density Polyethylene (PE-HD) pipes — Part 1: General quality requirements

12._  US 482-2, High Density Polyethylene (PE-HD) pipes — Part 2: Dimensions

13._  EN 1295-1, Structural design of buried pipelines under various conditions of loading — Part 1: General requirements

Referenced Notification(s):

·_        G/TBT/N/UGA/294

9.

Proposed date of adoption: To be determined

Proposed date of entry into force: To be determined

10.

Final date for comments: 60 days from notification

11.

Texts available from: National enquiry point [X] or address, telephone and fax numbers and email and website addresses, if available, of other body:

Uganda National Bureau of Standards

Plot 2-12 ByPass Link, Bweyogerere Industrial and Business Park

P.O. Box 6329

Kampala, Uganda

Tel: +(256) 4 1733 3250/1/2

Fax: +(256) 4 1428 6123

E-mail: info@unbs.go.ug

Website: https://www.unbs.go.ug