API Std 602 is a technical standard for gate, globe, and check valves for sizes DN 100 (NPS 4) and smaller in petroleum and natural gas service. It serves as a practical reference for organizations that need a common basis for valve selection, specification, and review in compact process applications. For buyers evaluating API Std 602, the document is useful as a recognized benchmark that supports consistent procurement, engineering coordination, and quality-focused decision-making across projects, maintenance work, and equipment documentation.

API Std 602 standard overview

This API standard provides an industry-recognized reference for small gate, globe, and check valves used in petroleum and natural gas facilities. The 11th edition, published in 2022, is intended to help align technical expectations around valve design and application for DN 100 (NPS 4) and smaller sizes. As a standard-oriented document, it is commonly used as a benchmark for specifying equipment, comparing vendor offerings, and supporting consistent engineering review in environments where valve reliability and interchangeability matter.

Where is API Std 602 used?

API Std 602 is commonly used in oil and gas, refining, and related process facilities where compact valves are specified for controlled flow and isolation duties. It may be referenced by engineering teams, procurement, inspection, maintenance, and operations personnel when defining valve requirements for projects, replacements, or plant modifications. The standard is especially relevant when a company needs a shared technical basis for small-valve selection, vendor documentation review, and alignment between design, fabrication, and field maintenance activities.

Practical importance of API Std 602

In day-to-day work, API Std 602 helps reduce ambiguity when teams evaluate small gate, globe, and check valves for petroleum and natural gas service. It supports more consistent purchasing decisions, clearer technical submittals, and more efficient coordination between engineering and QA/QC groups. For maintenance and reliability teams, it can also help preserve consistency across installed assets, spare parts planning, and replacement decisions. Using API Std 602 as a common reference can improve technical control and help lower the risk of mismatched valve specifications.

• Gate, globe, and check valves
• DN 100 (NPS 4) and smaller
• Petroleum and natural gas service
• Engineering and procurement reference
• Inspection, maintenance, and QA/QC support
• API standard benchmark for technical consistency