SIST EN 1778:2000

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: 30-Nov-2000
• ICS: 83.080.20 - Thermoplastic materials
• Technical Committee: IPMA - Polimer materials and products
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Dec-2000
• Due Date: 01-Dec-2000
• Completion Date: 01-Dec-2000
• Ref Project: EN 1778:1999 - 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.

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
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