RТМ 26-02-67-84 PDF

Full title and description

RТМ 26-02-67-84 — "Методика расчета на прочность элементов печей, работающих под давлением" (English title often rendered as "Strength analysis methods for heater pressure members"). This industry technical-methodological document establishes calculation procedures for the strength (mechanical design) of furnace/heater elements that operate under internal pressure, including cylindrical members, collectors and bends used in petrochemical and refinery heating equipment.

Abstract

The standard provides step‑by‑step calculation methods and formulae for determining stressed states and allowable stresses of pressure‑loaded furnace components (smooth cylindrical elements such as collectors and risers, and bends/offsets). It is intended to support design and fitness‑for‑service assessments of fired heaters and related tubular coils used in chemical, oil refining and petrochemical plants. The document is compact (technical guidance rather than a full design code) and focuses on practical calculation procedures for designers and technical specialists.

General information

• Status: Active (действует).
• Publication date: Introduced 01 January 1984; approval recorded in 1983 (approved by Союзнефтехиммаш / Минхиммаша). Data entries in public repositories show database updates (for vendor/catalog records) in later years.
• Publisher: Approved/issued by Союзнефтехиммаш (Ministry/Association of chemical machine‑building authorities as recorded in the document metadata).
• ICS / categories: Equipment for the chemical industry — OКС/ICS class 71.120 (equipment for chemical and petrochemical plants).
• Edition / version: Original technical-methodical edition (1984 introduction). No later formal edition number is shown in public catalogs.
• Number of pages: 17 (document length reported in standard catalog/databases).

Scope

RТМ 26-02-67-84 defines the calculation methodology for strength assessment of furnace/heater elements that operate under pressure — primarily those used in petroleum refining, petrochemical and allied chemical industries. The scope covers the strength calculation of smooth cylindrical elements (collectors, risers and similar members), calculation of bends/offsets, the set of conditional symbols and recommended design assumptions for temperature‑dependent long‑term strength assessment. The document is intended for designers, technical specialists carrying out strength checks and experts performing fitness‑for‑service evaluations of heating coils and furnace tubing.

Key topics and requirements

• Calculation procedures for smooth cylindrical pressure members (collectors, standpipes, risers).
• Methods for calculating bends, offsets and pipe transitions in furnace coils and tubular heaters.
• Definition of conditional notations/symbols used in formulae and examples.
• Recommendations on allowable stresses and long‑term strength considerations for high‑temperature operation (used as basis for design life evaluations in plant assessments).
• Reference to earlier versions / replacement of previous technical guidance (see related standards).

Typical use and users

Primary users are mechanical and process engineers, furnace/heater designers, mechanical integrity specialists, inspection and fitness‑for‑service experts, and regulatory/technical staff in oil refining, petrochemical and chemical plant design organizations. The methodology is applied during design calculations, refurbishment assessments, failure analyses and when establishing allowable stress limits for furnace tubing and associated pressure members.

Related standards

RТМ 26-02-67-84 supersedes (or replaces) earlier RТМ guidance such as РТМ 26-299-78 on similar subject matter and is often referenced alongside other sector normative documents (industry RD/RМ/ОСТ documents and later national standards dealing with heater design, inspection and remaining life assessment). Specific related documents cited in technical bibliographies include RD/РТМ and OST series used in refinery/heater integrity assessments.

Keywords

RТМ 26-02-67-84, strength calculation, furnace elements, heater pressure members, collectors, risers, bends, tubular coils, petrochemical equipment, refinery heaters, allowable stresses, long‑term strength.

FAQ

Q: What is this standard?

A: RТМ 26-02-67-84 is a technical-methodical document that provides calculation methods for the strength of furnace/heater elements operating under internal pressure, used primarily in oil refining and petrochemical applications.

Q: What does it cover?

A: It covers calculation procedures for smooth cylindrical pressure members (collectors, risers, etc.), calculation of bends/offsets and provides the notations and assumptions needed for strength assessments at elevated temperatures and under pressure.

Q: Who typically uses it?

A: Mechanical and process engineers, designers of heaters and coils, mechanical integrity and inspection specialists, and experts performing fitness‑for‑service or life‑assessment studies in chemical, petrochemical and refinery plants.

Q: Is it current or superseded?

A: Public standard/catalog records list RТМ 26-02-67-84 as active (действует). It replaced an earlier RТМ document (РТМ 26-299-78). For project work always verify with the latest regulatory/standards registry or the organization responsible for approvals to confirm current applicability.

Q: Is it part of a series?

A: Yes — it belongs to sectoral RТМ technical-methodical materials addressing heater and furnace equipment in petroleum/chemical industries and is referenced together with other RТМ, RD and OST documents covering related design, inspection and life‑assessment topics.

Q: What are the key keywords?

A: Furnace strength calculation; heater pressure members; collectors and risers; bends/offsets; allowable stresses; tubular coils; RТМ 26-02-67-84.