Subsea Mechanical Hot Tapping Fittings

STATS subsea Mechanical Hot Tapping Fittings facilitate the connection of new branch pipework to existing infrastructure without the requirement for hyperbaric welding or pre-installed tees. Mechanical fittings are routinely used to provide a flanged off-take to enable hot tapping into an existing pipeline while under pressure and with no interruption to production. The fittings can also be utilised as an access point to deploy a temporary double block and bleed BISEP isolation, STATS proprietary line plugging technology.

Mechanical Hot Tapping Fitting Applications

  • Tie-in or re-route of subsea pipeline infrastructure
  • Pipeline repair: hot tapping access point to deploy temporary line plugging technology

Videos

SureTap Subsea Hot Tapping, Pipeline Rerouting

Subsea Mechanical Pipe Connector Key Features

  • Designed to meet clients pipeline pressure and size requirements
  • Dual seal design, independent activation of seals and locks
  • Designed to be compatible with STATS BISEP assembly
  • Designed to withstand full pipe separation loads (full structural design)
  • Hydrogenated Nitrile Butadiene Rubber (HNBR) seal supplied as standard, alternative sealing material available upon request
  • DNV Design Review Certificate available upon request (optional item)
  • Annulus test port allows a pressure test between the dual seal arrangement
  • Designed for compatibility with a wide range of pipe materials including carbon steel and stainless steel as standard, duplex available on request
  • External grip assembly applies even linear and circumferential grip load around the host pipe, eliminating localised material deformity and localised stress fractures.
  • Easily installed and commissioned by divers with basic training
  • External grip, lock and seal assemblies eliminate possible flow disturbance and turbulence

Subsea Mechanical Pipe Connector Standards and Specifications

  • DNVGL-ST-F101 Submarine Pipeline Systems
  • ASME Boiler and Pressure Vessel Code, Section VIII, Div 2
  • API 5L, Specification for Line Pipe
  • ASME B16.5, Pipe Flanges and Flanged Fittings
  • ASME B31.8, Gas Transmission and Distribution Systems
  • ASME B31.4, Pipeline Transportation Systems for Liquid Hydrocarbons
  • API 6H, Specification on End Closures, Connectors and Swivels
  • External coated in accordance with Norsok M501 System 7