NPB 105-03 PDF

Full title and description

NPB 105-03 — "Norms of fire safety. Determination of categories of rooms, buildings and external installations on explosion and fire hazard" (Russian designation: НПБ 105-03). The document establishes a unified methodology for assigning fire- and explosion-hazard categories to indoor spaces, buildings (or fire compartments) and outdoor installations used for industrial and storage purposes, based on the nature, quantity and properties of combustible and explosive materials and the technological processes performed.

Abstract

NPB 105-03 provides classification rules and calculation approaches to determine category assignments (A, B, B1–B4, G, D, etc.) that are used to drive fire protection measures, layout decisions, protective equipment choices and regulatory compliance. The standard replaces earlier editions covering room/building and outdoor-installation categories and includes an informative annex with a recommended calculation for the participation coefficient (Z) of flammable gases and vapours in an explosion.

General information

• Status: Active (in force).
• Publication date: Approved by the Ministry of the Russian Federation for Civil Defence, Emergencies and Elimination of Consequences of Natural Disasters (MChS Russia) by Order No. 314 on 18 June 2003; entered into force 1 August 2003.
• Publisher: Approved by MChS Russia; prepared/published by GUGPS and FGBU VNIIPO (the State Fire Service research and publishing bodies of MChS Russia).
• ICS / categories: Protection against fire — ICS 13.220 (protection against fire) and related building protection categories (construction/building protection ICS groupings).
• Edition / version: Designation NPB 105-03 (2003 edition); intended as replacement for NPB 105-95 and NPB 107-97.
• Number of pages: 47 pages (typical electronic publication length).

These bibliographic and status details are recorded in official consolidations and normative libraries for Russian fire safety regulations.

Scope

NPB 105-03 applies to industrial and warehouse-type premises, parts of buildings separated by fire walls (fire compartments), and outdoor industrial/storage installations. It sets out procedures to determine the explosion and fire hazard category of a space based on the hazardous properties and quantities of stored/handled materials and on the specifics of technological processes, and thereby informs required protective measures, layout and equipment choices. The methodology is intended for use at design and operational stages by competent fire-safety specialists.

Key topics and requirements

• Definitions and classification scheme for explosion and fire hazard categories (A, B, B1–B4, G, D, etc.).
• Procedure and flowchart for assigning a category to indoor rooms, building compartments and external installations based on material properties, quantities and process parameters.
• Rules for calculating area/volume thresholds and fire load contributions that determine category boundaries.
• Recommended calculation method and annex for the participation coefficient (Z) of flammable gases and vapours in explosions (informative appendix).
• Normative references to related rules (electrical installation rules, other NPB documents) used when applying category results to equipment selection and protective measures.
• Guidance for when professional expert assessment is required (complex processes, mixed hazards, battery rooms, gas-handling areas, etc.).

Major technical elements and the appendix calculation are described in the normative text and accompanying explanatory materials.

Typical use and users

Primary users of NPB 105-03 include fire-safety engineers, facility and process designers, industrial safety specialists, regulatory inspectors, risk assessors, and consultants responsible for fire protection planning in industrial and storage facilities. The standard is applied during design, permitting, commissioning and when changing processes or storage regimes that affect fire/explosion risk categories.

Related standards

NPB 105-03 is used together with other NPB norms and regulatory documents on fire safety, electrical installation rules and technical regulations on fire safety. It supersedes NPB 105-95 (room/building categories) and NPB 107-97 (outdoor installation categories) and is often referenced alongside other fire-safety design standards and national technical regulations.

Keywords

fire safety; explosion hazard; room categories; building categories; outdoor installations; NPB 105-03; НПБ 105-03; fire classification; industrial safety; VNIIPO; MChS Russia.

FAQ

Q: What is this standard?

A: NPB 105-03 is a Russian fire-safety standard (НПБ 105-03) that prescribes the methodology for determining categories of rooms, buildings and outdoor installations with respect to explosion and fire hazard.

Q: What does it cover?

A: It covers classification rules, threshold calculations and procedural steps to assign hazard categories (which then inform protective measures, equipment selection and layout). The text includes an informative annex with calculation guidance for explosive-gas participation (Z coefficient).

Q: Who typically uses it?

A: Fire-safety engineers, designers and industrial safety professionals, as well as regulatory bodies and inspectors responsible for ensuring compliance with fire-protection requirements in industrial and storage facilities.

Q: Is it current or superseded?

A: NPB 105-03 was approved in 2003 and is recorded as the active regulatory text that replaced earlier NPB editions (such as NPB 105-95 and NPB 107-97). Users should check national consolidated sources or official regulatory databases for later amendments or related technical regulations.

Q: Is it part of a series?

A: Yes — NPB 105-03 belongs to the set of Russian "Norms of Fire Safety" (НПБ) documents and is commonly used alongside other NPB publications addressing fire-safety design, alarm systems, extinguishing systems and special-purpose rules.

Q: What are the key keywords?

A: Fire safety, explosion hazard, room categories, building categories, outdoor installations, classification methodology, MChS, VNIIPO, НПБ 105-03.