Retractable System – Pyramid Technical Services

Retractable Systems

Retractable intrusive systems provide a safe, adjustable, and efficient means of inserting corrosion monitoring elements or chemical injection and sampling devices directly into the process stream under pressurized conditions. Utilizing a 1-inch full-port isolation valve in combination with a stuffing box assembly, these systems enable inspection, corrosion monitoring, chemical dosing, and fluid sampling to be carried out without process shutdown. This makes them particularly suitable for low- and medium-pressure process applications.

These systems are extensively deployed across oil and gas, petrochemical, power generation, fertilizer, refinery, and water treatment facilities where continuous asset integrity monitoring and process reliability are essential.

Retractable ER Probes

Retractable LPR Probes

Retractable Coupon System

Chemical Injection &
Sampling Systems

System Overview :

A complete retractable system typically includes:

1″ Retractable Access Point (welded or threaded connection)
Stuffing Box Assembly for pressure sealing around the rod
Safety Clamp to prevent accidental rod ejection (mandatory above 100 psi / 150°F)
Retractor Tool for controlled insertion and depth adjustment
Monitoring or Injection Device (probe, coupon holder, injection quill, or sampling quill)

Applications :

Hydrocarbon Lines With Low Water Cut
High-Temperature or Dry Gas Services
Cumulative Metal-Loss Trending for Risk Prediction

Retractable ER Probes

Continuous Metal Loss Measurement

Retractable Electrical Resistance (ER) probes provide continuous monitoring by measuring the change in electrical resistance of a metal sensing element exposed directly to the fluid.

Key Features :

All-welded construction for extreme toxic service.
High-integrity glass-to-metal seal.
Pressure capability up to 1500 PSI (subject to valve rating).
Temperature capability
- Standard: 260°C (500°F)
- High-temperature: 520°C (1000°F)
Adjustable insertion depth for optimized flow exposure.
Available in CS, 316SS, Duplex, Alloy 625, C276, Monel, etc.

Applications :

Chemical Inhibitor Optimization
Cooling Tower Performance Monitoring
Online Corrosion Control in Water Systems

Retractable LPR Probes

Instantaneous Corrosion Rate for Conductive Systems

Retractable LPR probes deliver rapid, real-time corrosion rate data in aqueous or conductive process environments.

Key Features :

Instantaneous corrosion rate measurement.
Suitable for cooling water, water injection, produced water, and wet hydrocarbon systems.
Available in flush or projecting electrode configurations.
Designed for 1″ full-port valves.
Accurate and stable in conductive electrolytes.

Applications :

Baseline Corrosion Studies
Long-Term Inhibitor Validation
Physical Inspection for Pitting, MIC, Localized Attack

Retractable Coupon Holders

Offline Gravimetric Corrosion Measurement

Retractable coupon holders provide long-term corrosion exposure for physical metal-loss measurement.

Key Features :

Pressure rating up to 1500 PSI.
Temperature rating up to 260°C (500°F).
- Special varient for high-temperature application up to 1000°F.
Compatible with standard strip coupons (insulated or non-insulated).
Available in multiple alloys (CS, 304/316 SS, Duplex, etc.).
Adjustable insertion depth for representative flow exposure.
NACE-compliant materials.

Retractable Chemical Injection & Sampling Systems

Retractable injection and sampling assemblies allow targeted chemical dosing directly into or real-time fluid sampling from the process line while the system is under operation. These systems use the same stuffing box and rod assembly as retractable probes, thereby allowing flexible integration with monitoring points.

1. Retractable Chemical Injection Quill

Targeted Delivery of Treatment Chemicals

A hollow injection quill delivers corrosion inhibitors, biocides, scale dispersants, or other treatment chemicals directly into the fluid stream for maximum effectiveness.

Key Features :

Retractable hollow quill design.
Multiple dispersion tip options: Jet, Spray, or Multiorifice.
Constructed from 316 SS or corrosion-resistant alloys.
Compatible with chemical feed pumps and dosing systems.
PTFE, PEEK, and Viton® seals depending on chemical compatibility.
Adjustable insertion depth to reach high-turbulence zones.

Benefits :

Reduces chemical consumption through precise local dosing
Enhances inhibitor efficiency at critical corrosion locations
Supports closed-loop optimization using ER/LPR probe feedback

Applications :

Corrosion Inhibitor Dosing
Scale Dispersant Injection at Heat Exchanger Inlets
Biocide Injection in Cooling Water Systems

2. Retractable Sampling Quill

Representative Fluid Sampling Under Pressure

Retractable sampling quills withdraw fluid samples at the exact monitoring location for laboratory analysis.

Key Benefits :

No shutdown required for insertion, adjustment, or retrieval.
Full compatibility with ER, LPR, Coupons, Injection & Sampling.
Improves safety through controlled insertion via stuffing box and safety clamp.
Reduces OPEX through optimized inhibitor dosing and better corrosion control.
Supports predictive maintenance using real-time and long-term data.
Ideal for low to medium pressure systems, cooling water circuits, and process lines.

Key Features :

Retractable design with check-valve isolation
Sample-port with quick-connecting options
Supports grab sampling for water chemistry, MIC, solids, and inhibitor residuals
Optional heated or insulated variants for viscous fluids
Safe isolation via 1″ full-port valve

Applications :

Produced Water Analysis
Microbiological Activity Monitoring
Scale and Solids Monitoring
Chemical Performance Validation

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