Rapid Opening Closure (ROC II)

Rapid Opening Closure (ROC II)ROC II is a quick opening closure that ensures safe and reliable access to pipelines and pressure vessels. ROC II is a further development of the highly successful ROC launched in 2000 and which has now become a leading quick opening closure in the global pipeline industry.

ROC II provides a lightweight solution for both large diameter pipelines and smaller pipe sizes and ratings. ROC II is fully code compliant and uses a three piece design comprising hub, door and locking elements. An integral interlock is available as an option.

The ROC II quick opening closure makes use of a conical full compression transfer of load from the door to the hub via the locking mechanism. When the locking mechanism is in place it covers 100% of the door circumference giving uniform load transfer and reduced size and weight. In addition, this configuration offers high levels of safety, as any potential retraction of the locking elements will result in a hoop effect within the locking elements which prevents further retraction.

Features of the ROC II quick opening closure include:

  • Available in all sizes up to 60” and ratings up to 2500#
  • 100% circumferential locking element contact
  • Vent screw integrated into the closure
  • Very quick opening and closing capability
  • Available in all recognised materials
  • Fully visible and accessible vent screw seal
  • Can be supplied with a fully integrated key interlock
  • Incorporates dry lubricant technology
  • Seal incorporates integral anti-extrusion technology
  • Integral interlock option

Rapid Opening Closure (ROC II)Benefits of ROC II include:

  • Easy to operate by one person without hydraulic assistance and suitable for horizontal, vertical or inclined applications
  • Extended life capability of up to 50 years
  • Reduced potential for debris ingress due to 100% circumferential contact
  • Reduced lubrication schedule due to dry lubricant system
  • Optimised hinge design and alignment to provide ease of adjustment and single person operation up to maximum size

Application areas – Rapid Opening Closures from PE are suitable for onshore, offshore or subsea applications and for pipelines transporting gas, liquid, multiphase, sour or non sour mediums.

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