For pipeline operators and contractors, an unscheduled shutdown is a nightmare. Dealing with a leak, performing maintenance, or making a connection on a live line traditionally meant costly downtime and complex, risky operations. Our Equalizing Line Assembly, also known as a Bypass Tee or Inflatable Plug Tee, is the engineered solution designed for one critical purpose: to enable safe, efficient, and pressure-balanced pipeline isolation and bypass creation without stopping the flow. This key equipment is a cornerstone of modern hot tapping and plugging (line stop) systems.

Product Overview

Equalizing Line Assembly (Bypass Tee) | Safely Isolate & Balance Pipeline Pressure

The Equalizing Line Assembly is a critical pipeline fitting used by oil & gas, utility, and industrial companies during hot tapping and plugging operations to safely balance pressure across isolation valves and establish bypass lines, eliminating the need for a full system shutdown.

Key Benefits

• Enables Zero-Downtime Operations: Facilitate maintenance, repairs, and connections on live pipelines, saving hundreds of thousands in potential lost production.

• Ensures Maximum Safety: Integral to safe Stopple® and plugging procedures by equalizing pressure, preventing valve damage and mitigating risks for field contractors.

• Unmatched Reliability & Durability: Manufactured to high pressure ratings (Class 150 to Class 600, up to 10.0MPa) from materials like ASME A515/A516 Gr. 70, ensuring long-term performance.

• Simplified Bypass Installation: The standardized tee design provides a robust connection point for inflatable stoppers or plugs and the temporary bypass line, streamlining complex field service.

Detailed Product Description

(How It Works):
An Equalizing Line Assembly is a specialized full-encirclement split tee or cross fitting. It is welded onto the pipeline at the planned work site. During a line stop fitting installation, an inflatable plug or stopper is inserted through the fitting and inflated to isolate a section. The equalizing (or bypass) valve on the fitting is then used to:

1. Balance Pressure: Before opening or closing the main line valve, this valve equalizes pressure across the valve plates, preventing shock and damage.

2. Establish Bypass Flow: It connects the temporary bypass line, allowing product to flow around the isolated section.

3. Vent/Empty the Isolated Section: Post-operation, it safely vents or drains the isolated pipeline segment.

Technical Data:

Key Components:

• Full-Encirclement Split Tee/Cross Body: Provides structural integrity and a pressure-containing housing. The split design allows for easy installation around existing pipelines.

• Outlet Nozzle: The branch connection for attaching the tapping machine, plugging head, or bypass line.

• Equalizing/Bypass Valve Connection: A flanged or threaded port for installing the critical valve used for pressure balancing and bypass control. This is the heart of the assembly’s function.

• Reinforcement Saddle: Ensures the fitting can withstand pipeline stresses and internal pressure.

Core Problems Solved

• “Facing a pipeline repair that requires a week-long shutdown, costing millions?”

• “Worried about the safety risks of valve operation under full differential pressure during isolation?”

• “Need to install a bypass for a section replacement but dread the complexity and time?”

• “Looking for reliable, code-compliant fittings for your hot tapping and plugging program?”

Application

• Scenario 1: Emergency Pipeline Repair: Isolate a leaking section using an inflatable plug inserted through the tee, while product flows via the established bypass. Repair is made on a depressurized segment.

• Scenario 2: Planned Maintenance & Tie-Ins: Use the assembly as part of a hot tap stopple bypass operation to add a new valve or connection to a live main without interruption.

• Scenario 3: Plant Turnarounds: Isolate specific sections of complex piping within a facility for safe maintenance, using multiple Line Stopper Fittings.

• Scenario 4: Gas Network Upgrades: Safely replace aging valves or sections in urban gas distribution networks with minimal service disruption.

Why Choose Our Equalizing Line Assembly?

Vs. Traditional Methods (Full Shutdown):
Traditional shutdowns involve flaring or storing product, complete depressurization, and prolonged offline time. Our assembly enables pressurized isolation, slashing downtime by over 90%, enhancing safety, and reducing environmental impact.

Vs. Generic or Non-Standard Fittings:
Our fittings are not just “pipes with a branch.” They are engineered Pressure-Activated Sealing Fittings designed specifically for the high-stress load of plugging operations. We offer:

• Certified Materials & Traceability: Full material test certificates.

• Precision Manufacturing: CNC machining ensures perfect alignment for sealing surfaces.

• Custom Engineering: We adapt designs for non-standard pipe sizes, pressures, or materials.

Certifications, Safety & Quality Standards

• Manufacturing Standards: Designed and fabricated in accordance with ASME Boiler and Pressure Vessel Code Section VIII, Div. 1, and relevant pipeline codes.

• Quality Management: Our factory operates under a stringent ISO 9001:2015 certified quality management system.

• Safety by Design: The inclusion of the dedicated equalizing valve port is a fundamental safety feature, preventing operator error during critical pressure balancing steps.

• Testing: Each assembly undergoes hydrostatic testing to 1.5x design pressure and rigorous dimensional inspection.

Customer Testimonials & Case Studies

Trusted by leading pipeline operators and service companies worldwide.

Case Study:

• Client: A major national gas transmission company.

• Challenge: Replace a 24-inch mainline valve on a critical high-pressure gas artery without interrupting supply to downstream customers.

• Solution: Our engineered Full-Encirclement Split Tee with Outlet (Equalizing Line Assembly) was used as part of a Hot Tapping and Line Stop operation. An inflatable plug was set through the tee to isolate the valve section, and a temporary bypass maintained gas flow.

• Result: The valve was replaced safely over 48 hours. Zero supply interruption, zero safety incidents, and estimated savings of over $2M in avoided shutdown costs.

Service & Support Ecosystem

1. Pre-Sales Consulting: Our engineers provide free technical support to help specify the correct Equalizing Pipe Assembly for your project.

2. Global Supply: As a leading manufacturer and supplier, we offer competitive price and reliable delivery.

3. After-Sales & Training: We provide comprehensive documentation and can arrange training on the proper use of Pipeline Plugging Fittings.

4. Warranty: All products come with a standard 12-month warranty against defects in material and workmanship.

Frequently Asked Questions (FAQ)

Q1: What is the difference between an Equalizing Line Assembly and a standard hot tap tee?

A1: A standard hot tap fitting provides an outlet for making a connection. An Equalizing Line Assembly is specifically designed with an additional port for pressure equalization and bypass connection, making it integral to Pipeline Isolation and plugging operations, not just tapping.

Q2: Can this fitting be used with any type of inflatable pipeline plug?

A2: Yes, it is designed to be compatible with industry-standard Mechanical Pipeline Plugging Devices and Inflatable Stopper systems from major OEMs. The outlet dimensions and pressure rating must be matched to your specific plugging equipment.

Q3: Do you offer these for sale for immediate delivery?

A3: We stock popular sizes and pressure ratings. For custom or project-specific requirements, we provide rapid quoting and manufacturing lead times. Contact us with your specifications for the latest price and delivery information.

JSW Pipeline Services

For over two decades, JSW Pipeline Services has been a trusted partner in the global energy infrastructure sector. We are both a premier contractor providing field-proven hot tapping and plugging services and a specialized equipment manufacturer of critical components like the Equalizing Line Assembly.

Our dual role gives us unique insight: We design and build tools that we ourselves rely on in the field, ensuring they meet the highest standards of performance, safety, and durability. We don’t just sell a product; we provide a complete solution backed by hands-on experience.

Ready to eliminate costly shutdowns and enhance your isolation safety?
Contact JSW Pipeline Services today. Let our experts help you select the right Bypass Connection Tee for your next project. Request a quote, a detailed specification sheet, or a consultation with our engineering team.