Characteristic values for welded thermoplastics constructions - Determination of allowable stresses and moduli for design of thermoplastics equipment

This standard specifies a methodology for determination of the characteristic values necessary for the design of welded constructions for example vessels and tanks, ventilation ducting, containers and apparatus. It is assumed that due regard is paid to the standards and Codes of Practice listed in clause 2 as far as the choice of materials and their processing are concerned. The data is applicable for static loading. The relevant EN-Standards or ISO-Standards are applicable to the design calculations, dimensions, construction and testing of the various structures.

Charakteristische Kennwerte für geschweißte Thermoplast-Konstruktionen - Bestimmung der zulässigen Spannungen und Moduli für die Berechnung von Thermoplast-Bauteilen

Diese Norm legt ein Verfahren an zur Ermittlung von Kennwerten für die Berechnung von geschweißten Konstruktionen fest, z.B. Behältern, Wannen, Tanks, Apparaten und Ventilationsleitungen. Vorausgesetzt wird, daß bei der Wahl der Werkstoffe und ihrer Verarbeitung die Normen nach Abschnitt 2 berücksichtigt werden. Die Angaben gelten für überwiegend statische Beanspruchungen. Für die Berechnung, Maße, Ausführung und Prüfung der verschiedenen Konstruktionen gelten die jeweiligen EN-Normen oder ISO-Normen.

Valeurs caractéristiques des constructions thermoplastiques soudées - Détermination des contraintes admissibles et des modules pour la conception du matériel thermoplastique

Cette norme européenne donne une méthodologie permettant de calculer les enceintes et les réservoirs. Les conduits de ventilation, récipients et autres appareils sont couverts par cette norme. Il est conseillé de se reporter aux normes et au code de pratique cités dans la section 2 chaque fois que le choix des matériaux et leur traitement sont concernés. Les données s'appliquent à un chargement statique. Les normes EN ou ISO correspondantes s'appliquent aux calculs de conception, de dimensions, de construction et d'essais de diverses structures.

Značilne vrednosti zvarjenih konstrukcij iz plastomerov - Določanje dovoljenih obremenitev in modulov za načrtovanje opreme iz plastomerov

General Information

Status
Published
Publication Date
19-Oct-1999
Withdrawal Date
29-Apr-2000
ICS
83.080.20 - Thermoplastic materials
 
83.140.01 - Rubber and plastics products in general
Technical Committee
CEN/TC 249 - Plastics
Drafting Committee
CEN/TC 249/SC 5 - Welding of thermoplastics materials
Current Stage
9093 - Decision to confirm - Review Enquiry
Start Date
21-Nov-2023
Completion Date
14-Apr-2025
Ref Project
SIST EN 1778:2000 - Characteristic values for welded thermoplastics constructions - Determination of allowable stresses and moduli for design of thermoplastics equipment

EN 1778:1999 - Overview

EN 1778:1999 (CEN) specifies a methodology for determining the characteristic values required for the structural design of welded thermoplastics constructions. The standard focuses on the determination of allowable stresses and moduli used in the design of thermoplastic equipment such as vessels, tanks, ventilation ducting, containers and related apparatus. Data in EN 1778 apply to static loading conditions and assume that material selection and processing follow the standards and Codes of Practice referenced in clause 2 of the document.

Key topics and requirements

  • Characteristic values: Methodology to derive representative material properties for design (allowable stresses and elastic/plastic moduli) specific to welded thermoplastic assemblies.
  • Welded construction focus: Addresses how welding and fabrication affect mechanical properties used in design calculations.
  • Static loading applicability: Values and methods are intended for structures under static loads; dynamic or cyclic load considerations are outside this scope.
  • Integration with design standards: EN 1778 is intended to be used alongside relevant EN or ISO standards for design calculations, dimensions, construction and testing.
  • Material and process considerations: Requires that due regard be paid to referenced standards and Codes of Practice for material choice and processing to ensure the derived characteristic values are valid.
  • Practical deliverables: Provides technical basis for deriving safe allowable stresses and moduli for use in engineering drawings, strength checks and structural analysis of thermoplastic equipment.

Practical applications and users

EN 1778 is used wherever welded thermoplastic structures require validated design properties:

  • Design engineers working on tanks, vessels, ducting, containers and industrial apparatus made from thermoplastics.
  • Fabricators and welders who need to understand how welding affects allowable stresses for structural components.
  • Project engineers and consultants preparing specifications, safety assessments and compliance documentation.
  • Quality and testing laboratories developing test programs to confirm characteristic values for specific materials and welded joints.
  • Typical applications: chemical storage tanks, process vessels, HVAC ductwork, non-pressure containers and structural thermoplastic components under static load.

Related standards

  • EN 1778 is intended to be used in conjunction with relevant EN‑Standards or ISO‑Standards covering material specifications, welding practice, construction and testing. Clause 2 of EN 1778 lists the specific standards and Codes of Practice to be considered for material selection and processing.

Using EN 1778 helps ensure that welded thermoplastics designs apply consistent, defensible allowable stresses and moduli, improving safety, compliance and predictability in thermoplastics equipment design.

Frequently Asked Questions

EN 1778:1999 is a standard published by the European Committee for Standardization (CEN). Its full title is "Characteristic values for welded thermoplastics constructions - Determination of allowable stresses and moduli for design of thermoplastics equipment". This standard covers: This standard specifies a methodology for determination of the characteristic values necessary for the design of welded constructions for example vessels and tanks, ventilation ducting, containers and apparatus. It is assumed that due regard is paid to the standards and Codes of Practice listed in clause 2 as far as the choice of materials and their processing are concerned. The data is applicable for static loading. The relevant EN-Standards or ISO-Standards are applicable to the design calculations, dimensions, construction and testing of the various structures.

This standard specifies a methodology for determination of the characteristic values necessary for the design of welded constructions for example vessels and tanks, ventilation ducting, containers and apparatus. It is assumed that due regard is paid to the standards and Codes of Practice listed in clause 2 as far as the choice of materials and their processing are concerned. The data is applicable for static loading. The relevant EN-Standards or ISO-Standards are applicable to the design calculations, dimensions, construction and testing of the various structures.

EN 1778:1999 is classified under the following ICS (International Classification for Standards) categories: 83.080.20 - Thermoplastic materials; 83.140.01 - Rubber and plastics products in general. The ICS classification helps identify the subject area and facilitates finding related standards.

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Standards Content (Sample)


2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Charakteristische Kennwerte für geschweißte Thermoplast-Konstruktionen - Bestimmung der zulässigen Spannungen und Moduli für die Berechnung von Thermoplast-BauteilenValeurs caractéristiques des constructions thermoplastiques soudées - Détermination des contraintes admissibles et des modules pour la conception du matériel thermoplastiqueCharacteristic values for welded thermoplastics constructions - Determination of allowable stresses and moduli for design of thermoplastics equipment83.080.20PlastomeriThermoplastic materialsICS:Ta slovenski standard je istoveten z:EN 1778:1999SIST EN 1778:2000en01-december-2000SIST EN 1778:2000SLOVENSKI
STANDARD
SIST
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この記事では、EN 1778:1999について説明されており、この標準は溶接された熱可塑性構造物の設計に必要な特性値を決定するための手法が規定されています。この構造物には容器、タンク、換気ダクト、コンテナ、装置などが含まれます。この標準では、材料の選択および処理に関して指定された基準や規範に注意が払われることが前提とされています。データは静的荷重に適用されます。各構造物の設計計算、寸法、構築、試験には関連するEN標準またはISO標準が適用されます。

The article discusses the standard EN 1778:1999, which provides a methodology for determining the characteristic values required for designing welded thermoplastics constructions such as vessels, tanks, ventilation ducting, containers, and apparatus. The standard assumes that material selection and processing adhere to the listed standards and Codes of Practice. The data provided is specifically applicable to static loading. Design calculations, dimensions, construction, and testing should adhere to relevant EN-Standards or ISO-Standards for the different structures.

기사 제목: EN 1778:1999 - 금속 플라스틱 용접 구조물의 특성값 - 금속 플라스틱 장비 설계를 위한 허용 응력 및 탄탈지 결정 기사 내용: 이 표준은 용기와 탱크, 환기 덕트, 용기 및 장치 등과 같은 용접 구조물을 설계하기 위해 필요한 특성값을 결정하는 방법론을 명시한다. 이 표준은 재료 선택과 처리에 관련한 표준 및 실무규정을 고려한다고 가정한다. 해당 데이터는 정적 하중에 적용된다. 다양한 구조물의 설계 계산, 치수, 구성 및 시험에는 관련 EN 표준 또는 ISO 표준이 적용된다.

이 기사는 EN 1778:1999에 대해 논의하며, 이 표준은 용기, 탱크, 환기 관로, 용기 및 장치와 같은 용접된 열가소성 구조물의 설계에 필요한 특성값을 결정하기 위한 방법론을 명시한다. 표준은 재료 선택과 처리에 관련된 기준 및 관행이 고려된다고 가정한다. 이 데이터는 정적 하중에 적용된다. 다양한 구조물의 설계 계산, 치수, 구조 및 시험에는 관련 EN 표준 또는 ISO 표준이 적용된다.

記事のタイトル：EN 1778:1999 - 溶接熱可塑性構造物の特性値の決定-熱可塑性機器の設計のための許容応力と弾性率の決定 記事の内容：この規格は、溶接構造物（例：容器やタンク、換気ダクト、容器や装置など）の設計に必要な特性値を決定するための方法論を指定しています。材料の選択と加工に関しては、規定されている基準や実践規範に十分な配慮が払われていると想定されています。データは静的な負荷に適用されます。異なる構造物の設計計算、寸法、構造、および試験には関連するEN規格またはISO規格が適用されます。

The article discusses EN 1778:1999, a standard that outlines the process for determining characteristic values needed to design welded thermoplastics constructions. These constructions include vessels, tanks, ventilation ducting, containers, and apparatus. The standard assumes that materials and processing are in accordance with the specified standards and codes. The data provided in the standard is for static loading, and the design calculations, dimensions, construction, and testing of the structures should follow the relevant EN-Standards or ISO-Standards.