Safe, Efficient Access to Pressure/Process Vessels

SG Industrial Inc. offers a robust range of Quick Opening Closures engineered and manufactured by Sungov Engineering to provide rapid and reliable access to pressure vessels. Designed for safety, compliance, and efficiency, our closures help operators perform maintenance, inspections, and cleaning with minimal downtime—while meeting the rigorous requirements of ASME Section VIII, Division 1.

Key Benefits:

Clamp-Type Closures: Ideal for frequent access in small to medium diameter vessels
Segmented Band (Seg Band 2) Closures: Proven design for larger diameters and higher flow capacities

• Design pressures up to Class 900
• Sizes available up to 52 inches diameter

• Designed and manufactured in accordance with ASME Section VIII, Division 1, UG-35 requirements
• ASME “U” Stamp available upon request

• Mechanical locks to prevent inadvertent opening under pressure
• Pressure warning devices or bleed ports to ensure zero internal pressure before opening
• Secondary seals and gaskets to prevent leaks

Technical Overview:

Design Pressure Up to Class 900
Size Range Up to 52″ diameter
Closure Types Clamp-Type and Segmented Band (Seg Band 2)
Construction Materials Carbon steel, stainless steel, or specialty alloys
End Connections Welded or bolted flange
ASME Certification Optional “U” Stamp available

Why Choose SG Industrial Inc. Quick Opening Closures?

Engineered for Safety

Designed with operator safety in mind: mechanical interlocks, bleed ports, and pressure warning devices to prevent accidental opening under pressure.

Compliance You Can Trust

Our closures comply with ASME Section VIII requirements, including UG-35(a)/UG-35(b) and UG-35(c), to ensure safe operation under high-pressure conditions.

Efficient and Versatile

Available in clamp-type and segmented band configurations to match your process needs, with quick opening mechanisms that reduce maintenance time and improve productivity.

Typical Applications:

  • Filter vessels and strainers
  • Separators and knockout drums
  • Scrubbers and process gas vessels
  • Oil & gas, petrochemical, and power generation systems
  • sg-oilgas
    Oil & Gas
  • sg-petrochem
    Petrochemical & Chemical
  • sg-power
    Power Generation
  • sg-environ
    Environmental
  • sg-utils
    Utilities

FAQ — Quick Opening Closures

A quick opening closure is a pressure-tight access door for vessels or pipelines that allows fast opening and closing — saving time and reducing downtime compared to standard blind flanges.
A stainless steel quick opening closure supplier manufactures closures made from stainless-steel (or other pressure-rated materials) that meet industry standards for strength, corrosion resistance, and safety — suitable for demanding applications in filters, pressure vessels, pipelines, etc.
A quick open closure with safety latch ASME is designed and manufactured to comply with ASME codes (e.g. Section VIII / UG-35) and includes a mechanical safety latch or locking mechanism to prevent accidental opening under pressure. This ensures safe, compliant access to pressure vessels.
They are commonly used on filter vessels, separator units, pig launchers/receivers, blow-down lines, and other pressure-containment equipment needing frequent inspection or maintenance access.

Y-Strainers

Basket strainers / filters

Process filters

Filter Separators

Duplex Basket Filters & Strainers

Quick Opening Closures

Self-Cleaning Strainers & Filters

Custom Vessels & Exchangers

T & Conical Strainers

We look forward to partnering with you and delivering excellence in the oil & gas industry.