GOST 25822-83 PDF

Full title and description

ГОСТ 25822-83 — Сосуды и аппараты. Аппараты воздушного охлаждения. Нормы и методы расчета на прочность. (English: Vessels and apparatuses. Air‑cooled heat exchangers. Norms and methods of strength calculation.)

Abstract

Standard establishes requirements, calculation formulas and procedures for strength (mechanical integrity) verification of air‑cooled heat‑exchange apparatus with both split (flanged) chambers using flat gaskets and non‑split chamber designs operating under internal pressure. It includes mandatory calculation rules, coefficients, illustrative drawings and two appendices (one informative, one mandatory) for determination of stiffness and flange/bolt loading.

General information

• Status: Active (действует) — listed as in force in contemporary standards catalogues (status checked 27 February 2026).
• Publication date: Approved 10 June 1983; introduced into effect 1 January 1984.
• Publisher: Государственный комитет СССР по стандартам (State Committee for Standards of the USSR); developed by the Ministry of Chemical and Oil Engineering.
• ICS / categories: Related to boilers and heat exchangers (ICS area 27.060 — boilers and heat exchangers) and process heat‑exchange equipment for industry (e.g., chemical/petrochemical classifications). (ICS attribution is given here as the relevant international classification area for heat‑exchanger standards.)
• Edition / version: Original (1983) edition: ГОСТ 25822-83 (СТ СЭВ 3649-82).
• Number of pages: ~22 pages (official commercial copies list 22 pages).

Scope

Applies to air‑cooled apparatus (air coolers / finned‑tube dry coolers) with: (a) split (removable) chamber assemblies with flat gaskets and bolted flanges, and (b) non‑split (integral) chamber constructions — where the equipment operates under internal pressure. The standard sets calculation rules for wall, cover and tube‑bundle strength, bolt (stud) loads, tube‑sheet and tube‑bundle bearing capacity, allowable stresses and required coefficients for stiffness, perforated backs and tube‑grid arrangements. It is intended for equipment used in chemical, petrochemical and related industries and complements requirements of ГОСТ 14249‑80 and ГОСТ 24306‑80 referenced in the standard.

Key topics and requirements

• Calculation methods for strength of split and non‑split cooling chambers (formulas for pressures, moments and bolt forces).
• Rules for determining bolt (stud) preloads and verification of bolt strength under operating and test conditions.
• Design and strength checks for tube grids/plates, perforated backs and tube‑bundle support; allowable load per unit area for tube bundles.
• Coefficients and corrective factors (stiffness coefficients, reduction factors for bending, effective hole diameters, gasket widths, corrosion allowances).
• Mandatory procedure (appendix) for calculation of flange/cover and grid stiffness and illustrative construction drawings for typical chamber types.
• Reference to material allowable stresses and interaction with other GOSTs (e.g., ГОСТ 14249‑80).

Typical use and users

Engineers and designers of air‑cooled heat exchangers, mechanical designers of pressure equipment, calculation and strength verification specialists, fabricators and quality engineers in chemical, petrochemical, oil & gas and heavy‑process industries, as well as inspection bodies that certify pressure apparatus. The standard is used during design calculations, strength assessments for standard or custom air coolers, and to document compliance with Soviet/EASC design practice where this GOST is specified.

Related standards

Standard explicitly references and is to be used together with: ГОСТ 14249‑80 (materials / allowable stresses and related rules) and ГОСТ 24306‑80; it corresponds to ST SEV 3649‑82 (interstate / CMEA document). Other related normative documents for pressure equipment and heat‑exchanger practice (ASME, API or later national GOST/GOST‑R revisions) may be used in parallel where required by contract or regulation.

Keywords

air‑cooled heat exchanger; air cooler; vessels and apparatuses; strength calculation; tube grid; tube sheet; flange; bolt (stud) load; gasket; stiffness coefficient; pressure vessel; ГОСТ 25822‑83.

FAQ

Q: What is this standard?

A: ГОСТ 25822‑83 is a Soviet state standard that defines norms and calculation methods for the structural strength of air‑cooled heat‑exchange apparatus (air coolers) — both split (flanged) and non‑split chamber types operated under internal pressure.

Q: What does it cover?

A: It covers calculation formulas and procedures for chamber walls, covers, tube grids, tube‑bundle support and fastening (bolts/studs), allowable loads on tube bundles, stiffness and reduction coefficients, gasket and flange considerations, plus mandatory appendix material for stiffness determination and illustrative drawings.

Q: Who typically uses it?

A: Mechanical and pressure‑equipment designers, strength‑calculation engineers, fabricators of air coolers, and inspection/certification engineers working in chemical, petrochemical, oil & gas and related heavy industries where the GOST family of standards is applied.

Q: Is it current or superseded?

A: As of the status check on 27 February 2026 the standard is listed in major Russian standards catalogues as in force (действует). Users should verify national or purchaser requirements because projects sometimes require newer national or international codes in place of, or alongside, older GOSTs.

Q: Is it part of a series?

A: It belongs to the GOST series for vessels and apparatus (pressure equipment). The document references other GOSTs for material allowable stresses and related calculation data (notably ГОСТ 14249‑80 and ГОСТ 24306‑80) and is aligned with СТ СЭВ 3649‑82.

Q: What are the key keywords?

A: Air‑cooled heat exchangers, strength calculation, pressure vessels, tube bundle, tube grid, flange/gasket, bolt loading, stiffness coefficient, ГОСТ 25822‑83.