Line Stop and Hot Tap Fittings 4 Key Components for Reliable Intervention
Line stop and hot tap fittings are specialized components used to safely access and isolate pressurized pipelines without interrupting flow.
Hot tap fittings enable the creation of a controlled entry point into the pipeline, allowing for tie-ins, maintenance, or bypass installations. Line stop fittings work in tandem to temporarily block flow downstream of the tap, facilitating repairs, replacements, or modifications while the system remains live. Together, these fittings support critical operations in oil, gas, water, and industrial fluid networks, ensuring minimal downtime and maximum safety during intervention.
Models & Specifications
Line Stop Fittings
Line Stop Fittings are engineered as pressure-rated vessels designed for live pipeline isolation during maintenance, tie-ins, or rerouting operations. These fittings are welded directly to the pipeline and serve as the secure interface for mounting line stop equipment. Once installed, they allow technicians to insert a line stop head and safely block flow downstream—without shutting down the system.
🛠 Specifications
Design Data
- Design Code: ASME B31.3 / B31.4 / B31.8
- Design Pressure: Maximum per rating
- Design Factor: 0.72 (gas) / 0.4 (liquid)
- Design Temperature: –20°C to +80°C
- Corrosion Allowance: As per project requirements
Materials
- Extruded Split Tees: ASTM A234 WPB, WPH Y60, WPH Y70
- Fabricated Split Tees: Plate P355 NL1, P460 NL1 (EN 10.028-3), A537 CL1
- Flanges:
- ≤ 24″: ASTM A105, ASME B16.5
- 24″: MSS-SP-44 / ASME B16.47 Series A
- Bolts & Nuts: ASTM A193 B7 / A194 2H
- Pipe: API 5L Gr.B, ASTM A106 Gr.B, E355 (EN 10.028-3)
Testing & Welding
- NDT (ASME Section V):
- 100% Radiographic (RX) on butt welds
- 100% Ultrasonic (US) on other welds
- Welding Standards: ASME Section IX, API 1104
Certification
- EN 10204 Type 3.1 Material Certification
- Available in Carbon Steel and Stainless Steel
Fitting Types & Sizes
- Extruded and Welded Line Stop Fittings
- Size Range: Ø2” to Ø56”
Three Way Tee Fittings
3-Way Tee fittings are engineered for live pipeline branching and flow diversion in pressurized systems. These pressure-rated vessels are welded directly to the pipeline and provide a robust interface for creating bypasses, tie-ins, or multi-directional flow paths without interrupting service. Ideal for complex intervention setups, 3-way tees support hot tap and line stop operations with integrated access points.
🛠 Specifications
Design Data
- Design Code: ASME B31.3 / B31.4 / B31.8
- Design Pressure: Maximum per rating
- Design Factor: 0.72 (gas) / 0.4 (liquid)
- Design Temperature: –20°C to +80°C
- Corrosion Allowance: As per project requirements
Materials
- Extruded Split Tees: ASTM A234 WPB, WPH Y60, WPH Y70
- Fabricated Split Tees: Plate P355 NL1, P460 NL1 (EN 10.028-3), A537 CL1
- Flanges:
- ≤ 24″: ASTM A105, ASME B16.5
- 24″: MSS-SP-44 / ASME B16.47 Series A
- Bolts & Nuts: ASTM A193 B7 / A194 2H
- Pipe: API 5L Gr.B, ASTM A106 Gr.B, E355 (EN 10.028-3)
Testing & Welding
- NDT (ASME Section V):
- 100% Radiographic (RX) on butt welds
- 100% Ultrasonic (US) on other welds
- Welding Standards: ASME Section IX, API 1104
Certification
- EN 10204 Type 3.1 Material Certification
- Available in Carbon Steel and Stainless Steel
Fitting Types & Sizes
- Extruded and Welded 3-Way Tee Fittings
- Size Range: Ø2” to Ø56”
SStop & Locksure Flanges
We offer a robust range of flange systems engineered for high-integrity pipeline access, isolation, and intervention. Designed to meet demanding field conditions and pressure ratings, these flanges support hot tap, line stop, and distribution operations across oil, gas, water, and industrial networks.
🧱 Stainless Steel (SS) Flanges
Propipe SS flanges are manufactured from corrosion-resistant stainless steel, ideal for aggressive environments and long-term service. They provide a secure, pressure-rated interface for bolted connections and intervention tooling.
- Available in ASME B16.5 and MSS-SP-44 standards
- Sizes: Ø2” to Ø56”
- Pressure Classes: 150#, 300#, 600#, 900#
- Compatible with hot tap and line stop fittings
- Suitable for corrosive, high-pressure, and offshore applications
🔒 LockSure Flanges
LockSure flanges feature a proprietary locking mechanism for precise alignment and leak-free sealing during live pipeline interventions. Their bolt-on cylindrical design ensures rapid deployment and secure engagement in field conditions.
- Integrated locking collar for enhanced sealing integrity
- Pressure-rated for on-charge operations
- Sizes: Ø2” to Ø56”
- Compatible with Propipe hot tap and line stop equipment
- Ideal for fast, reliable sealing in critical operations
⛓️ SStop Distribution Flanges (Including SStop Plug)
SStop flanges are designed for distribution and isolation tasks in pressurized systems. They support both standard and high-pressure applications with a wide range of sizes and pressure classes.
- Design Pressure Range:
- Up to 35 Bars for Class 150# and 300# (Sizes: Ø4” to Ø12”)
- Up to 100 Bars for Class 150#, 300#, 600#, and 900# (Sizes: Ø4” to Ø56”)
- Includes SStop Plug for secure sealing and flow control
- Suitable for distribution, bypass, and isolation operations in live systems
Hot Tap Tees
Hot Tap Fittings are engineered as pressure-rated vessels designed for live pipeline access during hot tap operations. These fittings are welded directly to the pipeline and serve as the secure interface for mounting hot tap equipment. Once installed, they allow technicians to safely drill into pressurized systems for tie-ins, bypasses, or future line stop setups—without interrupting flow.
🛠 Specifications
Design Data
- Design Code: ASME B31.3 / B31.4 / B31.8
- Design Pressure: Maximum per rating
- Design Factor: 0.72 (gas) / 0.4 (liquid)
- Design Temperature: –20°C to +80°C
- Corrosion Allowance: As per project requirements
Materials
- Extruded Split Tees: ASTM A234 WPB, WPH Y60, WPH Y70
- Fabricated Split Tees: Plate P355 NL1, P460 NL1 (EN 10.028-3), A537 CL1
- Flanges:
- ≤ 24″: ASTM A105, ASME B16.5
- 24″: MSS-SP-44 / ASME B16.47 Series A
- Bolts & Nuts: ASTM A193 B7 / A194 2H
- Pipe: API 5L Gr.B, ASTM A106 Gr.B, E355 (EN 10.028-3)
Testing & Welding
- NDT (ASME Section V):
- 100% Radiographic (RX) on butt welds
- 100% Ultrasonic (US) on other welds
- Welding Standards: ASME Section IX, API 1104
Certification
- EN 10204 Type 3.1 Material Certification
- Available in Carbon Steel and Stainless Steel
Fitting Types & Sizes
- Extruded and Welded Hot Tap Fittings
- Size Range: Ø2” to Ø56”
🔧 Custom Fittings for Demanding Field Conditions
Enerteq delivers precision-engineered fittings tailored to your pipeline specs, pressure ratings, and operational constraints. Whether you’re working with non-standard pipe geometries, legacy interfaces, or extreme environments, our team adapts split tees, flanges, and intervention fittings to meet your exact requirements.
We support custom fabrication and modification across:
- Split tee profiles for irregular pipe diameters and wall thicknesses
- Flange configurations for non-standard bolt patterns and pressure classes
- Mounting interfaces compatible with legacy tapping and stopping equipment
- Material and coating options for corrosive, high-temperature, or offshore conditions
From hot tap to line stop fittings, Enerteq ensures every component is built for performance, safety, and field reliability.
Contact us to specify your project parameters—we’ll deliver fittings that match your technical standards and site realities.
Need installation tools but not sure of compatability? Try ESI’s Flange Master Tool or EZ Calc, torque Calculator.