Quick Opening Closures-EMT


Our comprehensive range of pressure-containing components is designed to meet the diverse needs of piping systems, ensuring repeated access to their interiors with ease. With a focus on quality, safety, and innovation, we offer a wide selection of QOCs that are fully customizable, available in different sizes and materials to suit various applications.


At EMT, we pride ourselves on being the leading provider of Quick Opening Closures (QOCs) that surpass industry standards. Our comprehensive range of pressure-containing components is designed to meet the diverse needs of piping systems, ensuring repeated access to their interiors with ease. With a focus on quality, safety, and innovation, we offer a wide selection of QOCs that are fully customizable, available in different sizes and materials to suit various applications.

Quick opening closure 2

Unveiling the Power of Quick Opening Closures

Quick Opening Closures play a vital role in facilitating efficient maintenance and inspection of piping systems. Equipped with a Pressure Warning Device, our closures provide essential indications of closure status, ensuring optimal safety during operations. By incorporating these closures into your setup, you gain the advantage of enhanced accessibility and seamless functionality.

Customizable Options for Every Application

Recognizing that every application is unique, we provide a range of customization options to meet your specific needs. Whether you require horizontal or vertical closures, we have the expertise to deliver tailored solutions. Our closures come with a variety of accessories, enabling you to optimize their functionality for your particular system.

Assisting Closure Operation with Quick Actuating Closure Operating Aids

For smooth and efficient closure operation, we offer Quick Actuating Closure Operating Aids. These aids, including Chain and Sprocket Drives, are designed to assist the operation of yoke-style closures. With these reliable accessories, you can enhance the performance of your closures and streamline your maintenance processes. T-Bolt Camlock and Break-Over Wrench Assemblies are alternative options available to suit your specific requirements.

Automation for Enhanced Efficiency

At EMT, we understand the need for automation in today’s demanding industries. Our Tube Turns Automated Closures provide a cutting-edge solution for pipeline launchers, chemical plants, and food processing industries. By integrating automated closure systems into your operations, you can achieve increased efficiency, reduced downtime, and improved safety.

Bayonet Quick Opening Closure

Versatile Options for Different Closure Styles

At EMT, we understand the importance of providing versatile closure options to suit the unique requirements and configurations of diverse piping systems. To cater to these needs, we offer a broad range of closure styles, including Single and Double Bolt Yoke style closures. These closures are designed to ensure a secure and reliable mechanism, ultimately maintaining the integrity of your piping systems. In addition, we provide Weld Neck Flanges and NPT Nipples as options for Single and Double Bolt Yoke style closures, enhancing the strength of the connection and further guaranteeing the system’s reliability.

To ensure optimal performance, our closures are meticulously designed with high-quality components such as forged hubs, hinged blanking heads, split-yoke clamps, operating bolts, and self-energizing O-ring gaskets. Each component is carefully selected and integrated into our closures to deliver outstanding functionality and durability. By offering an extensive array of closure styles, EMT is committed to providing our customers with adaptable and effective closure solutions that meet the demands of various applications and industries. Our focus on versatility and customization allows us to deliver closures that can withstand the rigors of diverse operating conditions, ensuring the long-term performance and reliability of your piping systems.

Materials and Compliance

At EMT, we prioritize the use of high-quality materials to ensure the longevity and reliability of our closures. Our products are crafted from Carbon Steel, Stainless Steel, and other premium alloys, meeting the rigorous specifications outlined by ASME. This commitment to quality ensures that our closures are capable of withstanding challenging environments and harsh operating conditions.

Temperature and Process Adaptability

We understand that temperature and process requirements vary across industries. To cater to these unique needs, we offer a wide selection of elastomer O-ring seals. These seals can be customized to suit specific temperature ranges and process conditions, providing a reliable and durable solution for your piping systems.

ASME Code Compliance and Code Stamping

At EMT, we take pride in our commitment to compliance. Our closures fully adhere to the relevant rules of the ASME code for Pressure Piping and the ASME Boiler and Pressure V

Trustworthy Sales Support

At EMT, we value our customers and strive to provide exceptional sales support. Our experienced team is ready to assist you with quotes, inquiries, and any other sales-related support you may need. They possess in-depth knowledge of our Quick Opening Closures and can guide you in selecting the right solution for your specific requirements.

Lock Ring Quick Opening Closure

What are Quick Opening Closures?

Vessel Code. We understand the importance of compliance in your operations, and we offer code stamping for ASME compliance upon request. With EMT, you can have peace of mind knowing that your closures meet the highest industry standards and regulatory requirements.

Quick Opening Closures are essential pressure-containing components that provide easy and frequent access to the interior of a piping system, as defined in ASME Sec VIII Div 1 Boiler and Pressure Vessel Code. These closures are equipped with a Pressure Warning Device designed to alert operators of residual pressure behind the door and to clearly indicate when the closure is securely closed and locked (ASME VIII-1UG35.2).

EMT manufactures an extensive range of Quick Opening Closures, available in sizes from 2″ to 72″.

Our Quick Opening Closures can be tailored for horizontal or vertical applications and can be fitted with a variety of accessories, including sight glasses, nozzles, drains, gauges, sampling ports, open/close automation, and safety interlocks. We offer connection types incorporating full and reduced access, as well as mitered designs for inclined or declined vessels. At EMT, our focus is on providing the most comprehensive and diverse closure product portfolio in the industry, ensuring we meet the unique requirements of our customers.


When it comes to Quick Opening Closures, EMT stands out as a reliable and leading provider. Our commitment to excellence, adherence to global standards, and dedication to customer satisfaction set us apart. By choosing EMT, you gain access to a wide range of customizable closures, innovative operating aids, automation options, and compliance with ASME codes. Trust in EMT to deliver the highest quality closures that surpass industry standards and help you achieve optimal performance and safety in your piping systems.




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Shenyang EMT Piping Technology Co., Ltd.

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  • Weekdays 8:00 - 20:00
  • Saturday 9:00 - 16:00
  • Sunday Closed
  • Holidays 10:00 - 14:00