JIS B 2002-1987 PDF

Full title and description

JIS B 2002:1987 — Face-to-face and end-to-end dimensions of valves. This Japanese Industrial Standard defines the recommended face-to-face, centre-to-face and end-to-end dimensional series for valves used in piping systems to ensure interchangeability of installation and consistent mating with flanges and pipe ends.

Abstract

This standard specifies face-to-face and end-to-end dimensions for valves intended primarily for piping applications, covering dimensional series for various valve types, nominal sizes and end-connections so as to provide installation interchangeability across manufacturers and systems.

General information

• Status: Current / active (reaffirmed in later reviews).
• Publication date: 31 March 1987 (JIS B 2002:1987).
• Publisher: Japanese Standards Association (JSA / JIS).
• ICS / categories: 23.060 (Valves — valves in general; commonly referenced as ICS 23.060.01).
• Edition / version: 1987 edition (designated JIS B 2002:1987); noted history includes reaffirmation actions in subsequent years.
• Number of pages: Approximately 30 pages (PDF/printed standard length reported by standards distributors).

Scope

Applies to the face-to-face and end-to-end dimensions of valves used mainly for piping. The standard provides dimensional series and recommended lengths for different valve types, sizes and end connections (for example, flanged and butt-welding ends) to ensure mechanical interchangeability and ease of installation in piping systems.

Key topics and requirements

• Standardized face-to-face, centre-to-face and end-to-end dimensional series for valves across nominal sizes.
• Dimensions for common end connections such as flanged ends and butt-welding ends to match pipework and mating flanges.
• Coverage of different valve types (e.g., gate, globe, check, ball/plug types) with dimensions appropriate to each type’s mounting/interchange requirements.
• Reference to related JIS standards and inspection/specification rules for valves to ensure overall conformity of design and testing.
• Intended to support interchangeability between manufacturers and compatibility with piping codes and installation practices.

Typical use and users

Used by valve manufacturers, piping and mechanical engineers, plant designers, procurement/specification teams and maintenance personnel to specify valve dimensions for new installations, replacements and retrofits. Also used by standards committees and certification bodies as a dimensional reference when assessing valve conformity.

Related standards

Commonly referenced alongside other valve and piping JIS documents such as JIS B 2003 (general rules for inspection of valves) and product-specific JIS like those for gray cast iron valves or butterfly valves. It serves a similar role to face-to-face dimensional standards in other systems (for example ASME B16.10 and comparable national standards).

Keywords

valve dimensions; face-to-face; end-to-end; centre-to-face; JIS B 2002; valve interchangeability; piping; flanged valves; butt-weld valves; nominal size.

FAQ

Q: What is this standard?

A: JIS B 2002:1987 is the Japanese Industrial Standard that defines face-to-face and end-to-end dimensional series for valves to ensure installation interchangeability in piping systems.

Q: What does it cover?

A: It covers recommended and standardized dimensions (face-to-face, centre-to-face, end-to-end) for various valve types and nominal sizes, and for common end connections such as flanged and butt-weld ends.

Q: Who typically uses it?

A: Valve manufacturers, piping designers and engineers, procurement/specifiers, and maintenance teams use this standard when specifying, manufacturing, ordering or replacing valves to ensure dimensional compatibility.

Q: Is it current or superseded?

A: The document is recorded as the 1987 edition (JIS B 2002:1987) and has been maintained in JIS catalogs with later reaffirmation entries; distributors and JIS metadata list the item as current/active while showing historical reaffirmations. Check the Japanese Standards Association for the latest status if you need authoritative confirmation.

Q: Is it part of a series?

A: Yes — it is part of the JIS B series for mechanical engineering (valve- and piping-related standards) and is commonly used in conjunction with other JIS valve standards and inspection/specification rules.

Q: What are the key keywords?

A: Valve face-to-face, end-to-end, centre-to-face, valve dimensions, JIS B 2002, valve interchangeability, flanged valves, butt-weld valves, piping dimensions.