Flowline Temperature Monitoring for Hydrate & Wax Prevention — ATEX

Prevents blockages, maintains flow assurance

Temperature

Quick Overview

Problem

Flowlines transporting multiphase hydrocarbons are vulnerable to hydrate formation and wax deposition when temperatures drop below critical thresholds. Manual checks and indirect inference delay detection, increasing the risk of blockage, pressure build-up, and unplanned shutdowns in ATEX-classified areas.

Solution

SENSAiO’s ATEX-certified temperature sensors provide continuous, wireless monitoring of flowline and pipe surface temperature, enabling early detection of cooling trends that lead to hydrate or wax formation.

Value

Improved flow assurance • Reduced blockage risk • Early intervention • Lower OPEX

ATEX

Zones 0–2 • Ex ia IIC T4 Gb certified temperature sensors

The Operational Challenge

Upstream flowlines transport oil, gas, and multiphase fluids from wellheads to processing facilities under varying ambient and operating conditions.

Key risks include:

  • Hydrate formation during low-temperature operation
  • Wax precipitation and gradual deposition
  • Seasonal or diurnal temperature swings
  • Loss of insulation performance over time

Common monitoring practices rely on:

  • Sporadic manual temperature readings
  • Assumptions based on ambient conditions
  • Reactive response after pressure increases or flow restriction

This leads to:

  • Late detection of hydrate or wax risk
  • Emergency chemical injection or heating
  • Unplanned production shutdowns
  • Increased personnel exposure during inspections in ATEX zones

Without continuous temperature visibility, operators cannot reliably manage flow assurance risks.

Why Continuous Temperature Monitoring Matters

Temperature is the primary driver of hydrate and wax formation.

Continuous monitoring allows operators to:

  • Detect cooling trends before hydrate formation begins
  • Validate effectiveness of insulation or heating systems
  • Optimise methanol or inhibitor injection timing
  • Correlate temperature with pressure and flow behaviour

A gradual temperature decline often precedes:

  • Increased pressure drop
  • Reduced flow efficiency
  • Complete line blockage

Real-time temperature data enables proactive intervention, avoiding costly remediation and production loss.

SENSAiO Solution

SENSAiO delivers a wireless, intrinsically safe temperature monitoring solution tailored for upstream flowline applications.

Core Components

Temperature Sensor (ATEX Ex ia IIC T4 Gb)

High-accuracy surface or process temperature measurement for pipelines and flowlines.

Wireless Communication

Supports LoRaWAN, Modbus, and MQTT for integration with SCADA and flow assurance systems.

Installation & Power

Battery-powered, clamp-on installation with no hot work, cabling, or production interruption.

Operational Benefits

  • Early warning of hydrate and wax risk
  • Improved flow assurance control
  • Reduced emergency intervention
  • Lower inspection frequency in hazardous areas

Results and ROI

Metric Before After
Temperature visibility Intermittent Continuous
Hydrate risk detection Late Early
Flowline blockage risk Higher Reduced
Unplanned shutdowns More likely Avoided

ATEX Compliance and Safety

All temperature sensors for flowline monitoring comply with:

  • Ex II 2 G Ex ia IIC T4 Gb (Zones 0–2)
  • IECEx certification
  • ATEX Directive 2014/34/EU

Intrinsically safe design supports installation on live flowlines without shutdown.

Integration and compatibility

Protocols

LoRaWAN, Modbus RTU/TCP, MQTT, REST API

Systems

SCADA, DCS, flow assurance platforms

Vendors

Honeywell, ABB, Emerson, Schneider

Cybersecurity

AES-128 encrypted communication

FAQ - Common Questions

Are Sensa.io sensors compatible with any gateway or network?

Yes, they connect to any LoRaWAN or MQTT infrastructure (Kerlink, Cisco, Milesight, MultiTech, etc.) for flexible integration with existing SCADA systems.

What ATEX certifications apply to Sensa.io devices?

All hazardous-area models are certified Ex II 2 G Ex ia IIC T4 Gb and IECEx approved for Zones 0–2.

What is the typical battery life?

Up to 10 years at 15-minute intervals, depending on signal strength and environment.

How are the sensors integrated into existing systems?

Through standard protocols — LoRaWAN, Modbus, MQTT, REST API — no proprietary middleware needed.

How does predictive maintenance reduce OPEX?

Early anomaly detection reduces emergency interventions by 30–40 %, extends equipment life and lowers energy costs.

What does the Sensa.io Valve Position Sensor actually measure?

The device detects real-time valve position states—open, closed, or intermediate—with high accuracy. It continuously sends this information wirelessly to your monitoring dashboard.

Can this sensor detect partial valve movement or stuck valves?

Yes. The sensor identifies irregular patterns such as partial movement, delayed response, or stuck valves, enabling early maintenance before failure occurs.

Is this sensor suitable for manual, motorized, and actuated valves?

Yes. It supports a wide range of valve types including ball, gate, butterfly, actuator-driven, and manual valves.

How fast does it update the valve position?

You can configure the reporting interval—from seconds to minutes—depending on your operational and battery needs.

How long does installation take?

Most installations take under 10 minutes. The sensor mounts using brackets or clamps without modifying existing valves.

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