API 6D -24^th Edition Certification:
Why it’s Important for Quality and Safety of Your Check Valves

What is the API Q1 ninth edition and API 6D 24^th edition monogram specification?

The American Petroleum Institute (API) is a trade association that has led the development of petroleum and petrochemical equipment and operating standards. Its API Monogram Program verifies that manufacturers are operating in compliance with industry standards.

The API Q1 ninth edition specification establishes the API Quality Management System requirements necessary for organizations to consistently and reliably manufacture products in accordance with API or other specifications for the use in the petroleum and natural gas industry.

The API 6D 24^th edition specification defines the requirements for the design, manufacturing, assembly, testing, and documentation of valves for application in pipeline and piping systems for the petroleum and natural gas industries.

This API 6D 24^th edition specification holds hydrostatic and pneumatic testing to a new higher standard, unlike the less API 598 testing, API 6D testing requires increased pressure testing durations, test medium rust inhibitor injection, medium pH monitoring  and more stringent design and manufacturing process control, as well as packaging requirements to reduce valve damage from transportation.

When requested by the purchaser, an API 6D monogram valve manufacturer must meet the strict testing and documentation requirements to insure the valves performance under designed operational pressure and temperature conditions.

Purchasing valves under the specification ensures greater reliability and safety for equipment and personnel.

Download our API 6D Certificate

Common Industries that Require API 6D

When transmitting raw materials and potentially harmful chemicals, it is critical that check valves are tested for proper safety and functionality. Therefore, the API 6D certification is commonly required for valves used in petroleum, natural gas and electrical generation industries. Specific industries requiring API 6D include:

• Natural Gas Transmission: Check valves are frequently built into natural gas transmission pipelines to prevent the occurrence of reverse flow. They act as critical components within these systems, as improper flow could result in dangerous leakages, contamination, explosions, or fires.

• Petroleum Production and Refining: Transforming crude oil into refined products for consumer industries requires a multi-step chemical process that adheres to strict standards. Check valves are used in a range of petroleum-related applications, including discharge compressors, cooling towers, water treatment, pumps, generators, and boilers.

DFT Valves Built to API 6D 24^th Edition Standards

In order to meet the needs of our clients in the natural gas and petroleum industries, we have certified our GLC® and PDC® check valve manufacturing processes to meet API 6D 24^th Ed. specifications. By improving design, manufacture, assembly, testing, and documentation processes, we’re able to provide a higher level of quality and safety.

• GLC® Silent Check Valve: This silent center-guided, spring-assisted flange valve can be used with several types of fluids and can operate under a wide range of temperature and pressure combinations. This check valve is API 6D 24^th certified and available in various materials and sizes.

• PDC® Check Valve: A silent, non-slam valve that is specifically designed to allow gases to flow in one direction through a pulse-dampening chamber on the discharge side of a compressor. Our PDC® model is API 6D 24^th certified and available in a range of materials and sizes.

• DFT is in the process of adding other valve models to the list of API 6D 24^th certified valves. Contact DFT if you require API 6D 24^th Edition Certification.

Online Case Studies

To learn more about how DFT’s API 6D certified check valves perform across industries, check out our application success stories.