GOST 21.401-88 PDF

Full title and description

GOST 21.401-88 — "System of design documents for construction. Production technology. Main requirements to working drawings" (Система проектной документации для строительства. Технология производства. Основные требования к рабочим чертежам). The standard specifies composition, graphic presentation rules and required contents of working drawings used for production technology documentation in construction and industrial projects.

Abstract

This interstate (GOST) standard (1988) defines the structure and principal formatting rules for working drawings of production technology (equipment layout, piping, connection schemes, lists and technical data) to ensure consistent presentation across project documentation within the SPDS (System of Project Documentation for Construction). It sets mandatory elements for drawing content, schematic representation, title blocks and lists used during manufacture, installation and commissioning.

General information

• Status: Introduced and in effect as an interstate (GOST) standard; originally introduced in 1988 and reprinted editions available (see national publications/databases for local applicability and later replacements if any).
• Publication date: Introduced 1 July 1988 (approved by the State Construction Committee / Gosstroy by resolution dated 28 December 1987).
• Publisher: Issued as an interstate GOST; approved/introduced by the State Committee for Construction of the USSR (Gosstroy).
• ICS / categories: Technical drawings / construction drawings (SPDS group); classified under SPDS drawing/documentation groups (OKSTU 0021 / technical drawing classifiers).
• Edition / version: Original 1988 edition (designation GOST 21.401-88). Reprints noted (for example a 2001 reissue); no broadly advertised later revision number in primary public references.
• Number of pages: Vendor and standards catalog records report approximately 18 pages (some catalog listings show 18–19 pages depending on format).

Scope

Applies to the preparation and presentation of working drawings for production technology across industrial and construction projects. The standard covers the composition of working-drawing sets (main working drawings for equipment and piping, mounting/connection schematics, data sheets, lists and specifications), rules for graphic representation, labelling, title-block information and required supporting tables/forms. It is intended for use where SPDS-format documentation is required for manufacture, installation and commissioning of equipment and technological piping systems.

Key topics and requirements

• Composition of the working drawings set for production technology (main drawings, connection/installation schematics, equipment and piping layouts, specifications and lists).
• Graphic presentation rules: symbol conventions, line types, simplified contour outlines for equipment, representation of pipelines and blocks, scale and dimensioning practice.
• Requirements for mounting/connection (installation) schematics including positional and alphanumeric designation of equipment and piping.
• Content and formatting of general data sheets, lists of technological units, pipeline characteristics and test/inspection instructions.
• Title block and document identification rules, numbering of sheets and assignment of drawing marks within the SPDS system.
• Cross-references to related SPDS and ESKD/GOST drawing standards for consistent presentation and compatibility.

Typical use and users

Used by process and mechanical engineers, design institutes, draftsmen, detailers, chief engineers and contractors involved in industrial plant design, equipment layout and installation. Typical applications include preparation of working documentation for equipment assembly, technological piping systems, connection schemes and documentation handed to installation teams and fabricators in countries or projects using SPDS/GOST drawing conventions.

Related standards

Commonly referenced alongside other SPDS and ESKD standards such as GOST 21.101 (general rules for project documentation within SPDS), GOST 21.110 (specifications and lists), GOST 21.114 and related ESKD/GOST drawing rules. Project- and industry-specific regulatory documents (SNiP, GOST R or later GOST editions) may supplement or supersede parts of the practice in certain national contexts.

Keywords

SPDS, system of project documentation for construction, working drawings, production technology, equipment layout, mounting/connection schemes, piping drawings, title block, GOST 21.401-88.

FAQ

Q: What is this standard?

A: GOST 21.401-88 is a Soviet-era interstate standard (GOST) that defines main requirements for the preparation and presentation of working drawings used for production technology within the SPDS system. It prescribes the composition of drawing sets and rules for graphic representation and documentation content.

Q: What does it cover?

A: It covers the structure and required content of working drawings for technological equipment and piping (installation/mounting schematics, equipment and pipeline layouts, lists and specifications), graphic rules (symbols, lines, contours, scales), title block requirements and forms used in the working documentation set.

Q: Who typically uses it?

A: Process/mechanical engineers, design bureaus and drafting teams producing construction and industrial installation documentation, as well as contractors and installation specialists who receive and execute work from SPDS-format working drawings.

Q: Is it current or superseded?

A: The 1988 edition (GOST 21.401-88) remains a referenced SPDS document in many collections and databases; however, national practice may have introduced newer or revised SPDS/GOST R documents and industry-specific regulations since 1988. Users should verify current applicability and any superseding national standards or technical regulations with the relevant national standards body or project authority before design work.

Q: Is it part of a series?

A: Yes — it is part of the SPDS (System of Project Documentation for Construction) family of standards (GOST 21.xxx series) and is intended to be used together with general SPDS/ESKD drawing rules and related GOSTs that govern titles, formats and specific discipline rules.

Q: What are the key keywords?

A: SPDS, working drawings, production technology, equipment layout, piping, mounting/connection scheme, title block, GOST 21.401-88.