EN 2375:1992

Overview

EN 2375:1992 - Aerospace series - Resin preimpregnated materials - Production batch sampling procedure - specifies the standardized method for sampling production batches of resin preimpregnated fibre reinforcement (prepregs) used in aerospace applications. The standard defines how to select, identify and handle representative samples from manufacturing lots to support quality control, testing and traceability throughout the supply chain. (Also published as SIST EN 2375:2001 in Slovenia.)

Key topics and requirements

The standard focuses on practical, repeatable procedures rather than material performance criteria. Key technical topics typically covered include:

• Definition of a production batch and principles for ensuring a sample represents the lot.
• Sampling strategy - how and where to collect specimens from rolls, sheets or cut lengths so results reflect batch variability.
• Sample identification and traceability - marking, labeling and record‑keeping to link samples with batch records, process data and material certificates.
• Handling, conditioning and storage of samples to prevent contamination, resin migration or curing prior to testing.
• Preparation of test specimens suitable for downstream mechanical, physical and chemical analysis.
• Documentation and reporting requirements to ensure consistent communication between manufacturer, test laboratory and customer.
• Acceptance and disposition guidance - decision outcomes based on test results (e.g., retain, rework, quarantine), without prescribing specific acceptance limits.

Note: EN 2375 describes sampling procedure and logistics; it does not itself set performance thresholds for prepreg material properties.

Applications

EN 2375 is used wherever consistent, auditable sampling of prepregs is required. Typical practical applications include:

• Incoming inspection of prepreg shipments at aerospace manufacturers and tier suppliers.
• In‑process quality control during prepreg production and layup operations.
• Preparation of representative specimens for qualification testing, batch release and lot certification.
• Support for investigations into nonconformances, batch variability or supplier audits.
• Ensuring traceability in regulated aerospace programs and for certification evidence.

Who uses this standard

• Composite material manufacturers and prepreg producers
• Aerospace OEMs and tier‑1/2 suppliers
• Quality engineers, production managers and materials laboratories
• Procurement and inspection teams managing supplier conformity
• Certification and regulatory bodies requiring standardized sampling procedures

Related standards

EN 2375 complements other aerospace material standards that address prepreg properties, testing methods and manufacturing controls. Users should apply EN 2375 alongside relevant material test standards and supplier quality system requirements to establish a complete QA program for aerospace prepreg materials.

Keywords: EN 2375:1992, resin preimpregnated materials, prepreg sampling, aerospace composites, production batch sampling, quality control, traceability.