# API 607 vs API 608: Key Differences and Applications

Introduction

When it comes to industrial valves, standards play a crucial role in ensuring safety, reliability, and performance. Two important standards in the valve industry are API 607 and API 608. While they may sound similar, these standards address different aspects of valve performance and applications. Understanding the differences between API 607 and API 608 is essential for engineers, procurement specialists, and maintenance personnel working with industrial valves.

What is API 607?

API 607 is a standard that specifies fire testing requirements for quarter-turn valves and actuators. The full title is “Fire Test for Quarter-turn Valves and Valves Equipped with Nonmetallic Seats.” This standard evaluates the ability of a valve to maintain its integrity and operability after exposure to fire.

Key aspects of API 607 include:

  • Testing procedures for fire exposure

  • Performance requirements during and after fire exposure

  • Leakage rate limitations

  • Operational requirements post-fire

What is API 608?

API 608 is titled “Metal Ball Valves – Flanged, Threaded, and Welding End.” This standard covers the design, materials, dimensions, testing, and inspection requirements for metal ball valves used in various industrial applications.

Key aspects of API 608 include:

  • Design and construction requirements

  • Material specifications

  • Pressure-temperature ratings

  • Testing procedures

  • Marking and documentation requirements

Key Differences Between API 607 and API 608

Feature API 607 API 608
Scope Fire testing for quarter-turn valves Design and manufacturing of metal ball valves
Primary Focus Fire safety performance General valve construction and performance
Valve Types Quarter-turn valves with nonmetallic seats Metal ball valves specifically
Testing Requirements Fire resistance testing Pressure testing, material testing, etc.
Application Critical services where fire safety is paramount General industrial applications

Applications of API 607 Valves

API 607 compliant valves are typically used in applications where fire safety is a critical concern:

  • Oil and gas processing facilities

  • Petrochemical plants

  • Refineries

  • Offshore platforms

  • Any location where flammable materials are present

Applications of API 608 Valves

API 608 valves find application in a wide range of industrial settings:

  • General process industries

  • Water treatment facilities

  • Power generation plants

  • Chemical processing

  • HVAC systems

Can a Valve Meet Both Standards?

Yes, it’s possible for a valve to meet both API 607 and API 608 standards. In fact, many high-quality ball valves designed for critical services will comply with both:

  • API 608