ISO 2426-4:2018 PDF

Name: ISO 2426-4:2018 — Plywood — Classification by surface appearance — Part 4: Palm-plywood
SKU: ISO 2426-4:2018
Price: 25 EUR
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Plywood — Classification by surface appearance — Part 4: Palm-plywood

Название (английский):

ISO 2426-4:2018

Plywood — Classification by surface appearance — Part 4: Palm-plywood

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 4
Дата публикации:: 19 сентября 2018 г.
Издание:: ISO IS 2426 edition 1 version 1
ICS:: 79.060.10

Тип поставки:

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Язык документа:

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Срок поставки:1 раб. дн. (перевод)

Цена:60 €

Описание (английский):

This document specifies the nature and limits of characteristics inherent in palm-plywood and manufacturing defects enabling the visual assessment of the plywood for allocation to an appearance class. This document applies to palm-plywood, the surface veneers of which are made from oil palm trunk.

Abstract

Overview - ISO 2426-4:2018 (Palm‑plywood, surface appearance)

Key topics and technical requirements

Scope and materials: Applies specifically to plywood with surface veneers produced from the oil palm trunk (defined terms: oil palm trunk, oil palm veneer, outer and inner veneer).
Appearance classes: Surfaces are assigned to one of five classes: E, I, II, III, IV, based on permissible characteristics and defects.
Inherent palm‑veneer characteristics: The standard lists allowed natural features and their limits, including:
- Pin holes (e.g., ≤ 1.5 mm diameter; limited number per sheet)
- Splits, irregular grain (tiger grain), discoloration, bark pockets, and insect/borer marks - with class‑dependent size and quantity limits
- Distinction between outer veneer (denser, higher fibre content, lower parenchyma) and inner veneer, which affects appearance
Manufacturing defects: Defines acceptable limits for defects such as open joints, overlaps, blisters, hollows, roughness, sanding‑through, glue penetration, foreign particles and repairs. Numeric limits include maximum widths, counts per metre or sheet, and percentage of panel area in certain cases.
Assessment method: Visual assessment and classification follow the procedures in ISO 2426-1; defects are judged per the tables of permissible types, sizes and frequencies.

Practical applications and users

Who uses ISO 2426-4:

Plywood manufacturers (quality control, production specification)
Panel product engineers and veneer processors working with oil palm trunk material
Procurement/specifiers in furniture, interior fit-out, and building products who need appearance grades
Quality inspectors, testing bodies, and traders for acceptance criteria and dispute resolution
Architects and designers specifying aesthetic grades for visible plywood surfaces

Practical value:

Ensures consistent appearance grading, improving transparency in trade and procurement
Helps producers set manufacturing tolerances and surface‑finishing processes for palm‑veneer panels
Facilitates clear communication of visual quality requirements in contracts and technical specifications

Related standards

ISO 2426-1 - Plywood - Classification by surface appearance - Part 1: General (assessment procedure)
ISO 2074 - Plywood - Vocabulary

Keywords: ISO 2426-4, palm‑plywood, oil palm veneer, surface appearance classification, plywood standards, appearance classes, manufacturing defects, visual assessment.

Технические детали

Технический комитет: ISO/TC 89/SC 3 - Plywood
SKU: ISO 2426-4:2018

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ISO 2426-4:2018 PDF

Abstract

Overview - ISO 2426-4:2018 (Palm‑plywood, surface appearance)

Похожие стандарты

Key topics and technical requirements

Practical applications and users

Related standards

Технические детали

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Thermal insulation products. Hemp fiber mat and board. Specification.

ISO 2074:2007/Amd 1:2017

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BS ISO 24261-2:2021

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