BISEP Isolation Tools for Sale from PAPS
Pipeline intervention and isolation can be achieved using STATS patented BISEP™. The BISEP™ range provides double block and bleed isolation deployed through a single full bore branch or hot tap penetration. This high integrity isolation is provided by a spherical dual seal plug which is deployed from a pressure competent launcher through an isolation valve and rotated towards the flow of pressure to be isolated. The spherical head houses twin compression seals and provides a facility to bleed and monitor the intermediate annulus. The seal annulus port proves and monitors the seal integrity before and during intervention work. The BISEP™ head utilises the same compression seal technology as our Tecno Plug™ isolation tools.
The seals are activated by a hydraulic cylinder inside the plug which compresses the seals. The resultant radial expansion pushes the seals out to seal against the pipe bore. Further application of hydraulic pressure generates a rubber pressure in the seal elements which allows the annulus between the seals to be pressure tested. Line pressure acting against the tool pressure head maintains seal pressure creating a fail-safe feature providing actuation independent of the hydraulic system. The ejection load resistance is provided by the tool’s deployment head. Once the BISEP™ is deployed and set in position the pipeline or valve maintenance / repair can take place safely and efficiently. Applications: • Pipeline / launcher valve installation or replacement • Pipeline / Riser inspection, repair, replacement or decommissioning • Rerouting of process flow • Mid-line pipeline repair due to anchor drags or a dropped object on the pipeline • Isolate pressure vessels • Water or gas injection line isolation • Isolation of pipeline end manifolds, pipeline end terminals, subsea manifolds or skids for repair, upgrade or replacement. Operator Benefits: Fully verifiable Double Block & Bleed isolation through single intervention point: • Dramatically increases safety over traditional line stop technology • Single operation significantly reduces costs. (Single fitting, welding, inspection, scaffolding, crane and excavation costs) • Single operation significantly reduces workscope timescales, resulting in reduced shut-down time • Single fitting allows installation in restricted access piping • Reduced inspection / quality control / hot work permits (single fitting) • BISEP™ technology complies with operator double block and bleed requirements • Minimised production disruption on interconnected pipeline networks during valve repairs / tie-ins etc. Key Features: • Annular bleed port proves and monitors the seal integrity before and during any intervention work • Isolation integrity monitored through annulus, hydraulic set circuit and body vents continuously • Design provides axial restraint through bearing on dual clevis plates (no single point failure) • Seal annulus bleed provides Zero Energy Zone • Dual compression seals are more compliant and have a far higher success rate than traditional cup seals particularly in pitted pipework • Self Energisation of seals maintains isolation integrity independent of hydraulic control circuit • Negates the need for additional taps for bleed • Can accommodate reinstatement pressure test • BISEP™ isolation installed upstream of fitting, maintaining fitting in safe zone during workscope • BISEP™ launcher ported to facilitate venting, purging and flushing of isolated section • Can be deployed through conventional equal tee / clamp / branch. Key Features:
• Size range: 3” – 36” • For sizes 2" and below see STATS BI-STOP™ range • Pressure range: up to 150 bar (+2100psi) • Design allows for deployment in high flow conditions