ANSI Valves

What Are ANSI Valves?

ANSI valves are industrial valves designed and manufactured to American National Standards Institute (ANSI) standards, which are widely adopted in North America and in international projects where American engineering standards are specified. ANSI valve standards cover dimensions, materials, pressure-temperature ratings, testing and marking — providing a consistent framework for valve specification, procurement and interchangeability across manufacturers.

Available through the Honiks sourcing network, ANSI valves are currently offered in bellow seal globe and gate valve configurations for applications requiring zero stem leakage and reliable shut-off or flow regulation in ANSI-compliant pipeline systems. Our supplier network can produce ANSI valves to the most commonly referenced standards including ANSI B16.5 for flanged connections, ANSI B16.25 for butt-welded ends, and ANSI B16.10 for face-to-face dimensions.

Inch Sizes and Class Pressure Ratings

ANSI valves use two key conventions that differ from European EN/DIN standards:

Inch sizes: Nominal pipe sizes are expressed in inches rather than millimetres. ANSI valves sourced through Honiks are available from 1/2 inch to 16 inch, depending on the product series. The forged HN69 series covers 1/2 inch to 3 inch for compact high-pressure applications, while the cast steel HN70 series covers 2 inch to 16 inch for larger pipeline systems.
Class pressure ratings: ANSI pressure ratings are expressed as Class numbers — Class 150, 300, 600, 900 and 1500 — with allowable working pressure decreasing as temperature increases, per the applicable ASME B16.34 pressure-temperature table. Both the HN69 and HN70 bellow seal series are available across the full Class 150-1500 range, subject to size and material selection.

ANSI B16.5, B16.10 and B16.25 Options

Key ANSI dimensional standards relevant to the valves supplied through Honiks include:

ANSI B16.5: Governs flanged connections — flange dimensions, drilling patterns, facing types and pressure-temperature ratings for pipe flanges and flanged fittings. Flanged ANSI valves in our catalogue are supplied with B16.5-compliant raised face flanges.
ANSI B16.10: Standardises face-to-face and end-to-end dimensions for valves, ensuring that valves from different manufacturers are physically interchangeable within the same pipeline configuration.
ANSI B16.25: Covers butt-welding end preparation for valves — bevel angles, wall thickness transitions and root face dimensions to ensure proper weld fit-up in the field.

For gate valve configurations, API 600 provides relevant design and testing guidance. For the bellow seal stem design, which is not addressed by API 600, quality control and pressure testing are coordinated through our supplier network based on project-specific requirements.

Bellow Seal Globe and Gate Valve Applications

The bellow seal design is the defining feature of the ANSI valves currently available through Honiks — eliminating stem leakage for emission-controlled service. Typical ANSI bellow seal valve applications include:

Oil and gas production and processing: Wellhead isolation, gathering systems, gas processing and refinery piping where fugitive emission control is a regulatory requirement.
Petrochemical plants: Process lines handling volatile organic compounds, hazardous chemicals and high-temperature hydrocarbons.
High-pressure steam: ANSI Class 600-1500 steam distribution and auxiliary systems in power generation and industrial steam plants.
Natural gas transmission: Pipeline isolation and compressor station valving where stem leakage represents both a safety concern and a product loss issue.
Chemical processing: Plant piping systems requiring reliable emission sealing for environmental compliance and workplace safety.

Documentation and Quality Control

For ANSI valve procurement through Honiks, typical documentation includes material test certificates per the applicable ASTM material standard, pressure test reports per API 598 or the project-specified testing standard, and dimensional inspection records. Our sourcing team works with qualified partner factories to coordinate documentation requirements and can arrange third-party inspection when specified in the project requirements.

Related ANSI Products

Forged Steel Bellow Seal Globe/Gate Valve ANSI HN69
Bellow Seal Globe/Gate Valve ANSI HN70

To discuss ANSI valve requirements for your project — including inch size, Class rating, material grade and connection preferences — contact our team at info@honiks.com.