Process Analyzer Sample Probe Assembly (SPA)

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Process Analyzer Sample Probe Assembly (SPA)
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Bet this never happens.?
WARNING TAG READS DO NOT SHUT VALVE WITH PROBE
INSERTED
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What is a Sample Probe Assembly?

• The Conax Sample Probe Assembly or SPA is
  designed to insert and retract a Sample Probe
  into a closed-loop pressurized process pipeline
  though a process isolation valve.
• The use of a Sample Probe facilitates the
  extraction of a representative product Sample
  (gas and / or liquid) from the process pipeline.
  The extracted sample is then analyzed to measure
  its physical and chemical properties.
• Sample Probes can be either a Retractable or
  Fixed Design. A retractable design allows the
  Sample Probe to be completely removed from the
  process pipeline whereas as fixed probes are
  permanently installed. Retractable Sample Probes
  can be replaced in the event they become plugged
  or corroded.
• In order to insert / retract a Sample Probe into
  a pressurized process pipeline, a process
  isolation valve and Compression Sealing Gland are
  required. The use of a Conax Packing Gland (PG)
  with either a Teflon or Grafoil Sealant has
  been the recognized solution in the Oil Gas
  Industry.

• A Sample Probe can be either tubing or pipe
  fabricated from various materials as required by
  the process conditions.
• The common rule of thumb is to position the tip
  of the Sample Probe one-third to one-half into
  the inside diameter of process pipeline. Under
  high flow-rate conditions, this immersion depth
  will need to be reduced and / or supported via a
  nozzle support.

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The angled end of the Sample Probe is typically
positioneddownstream to flow.

• Sample Probes with angled ends are designed to
  exclude dust, pipe-scale, and liquid drops from
  the extracted sample. The principal is momentum.
  If the particles and drops are heavier than the
  process fluid, they will be reluctant to make the
  sharp turn into the angled-end.

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Safety

• Conaxs SPA is used to insert a Sample Probe into
  a pressurized and sometimes caustic closed-loop
  system, therefore
• Operator Safety must be always be considered.
• Conaxs SPA Design takes this under consideration
  with

• Plasma Welded Stop Collar
• Optional Retaining Chain Kit
• SST Warning Tag
• The end-user is ultimately responsible for the
  operation of the SPA since the Conax PG gland is
  only rated for static conditions at full torque.
  Refer to the USER CAUTIONS on Conaxs SPA
  Bulletin.

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What does Conax offer?

• Single source to insure correct design, materials
  and fit of the Sealing Gland to the Sample Probe.
  
• Capability to supply both the Sealing Gland and
  Sample Probe from various materials such as
  316SST, 316LSST, NACE316SST, Monel, Hastelloy
  C276 and Hastelloy C22 based process corrosion
  requirements.
• Plasma welded machined stop collar. If the SPA is
  coated or electro polished we weld both sides of
  the collar eliminating crevices.
• SPA assemblies are available with an optional
  Retaining Chain Kit
• Sample Probes are available with laser markings
  to indicate installation depth and/or UPSTREAM
  and DOWNSTREAM orientation relative to the angled
  end.
• Experience selling to major Oil Gas accounts
  worldwide.
• A SPA quote request form is available to identify
  the full range of process conditions such as
  Velocity, Pressure, Temperature, Physical
  Dimensions and Material Requirements
• Stress Wake Frequency Analysis of probe can be
  performed to validate the probe design if desired.

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Options
PG Gland Body with Bonda Relief Counterbore

• Integral metal ferrule provides
• Secondary Mechanical Support
• Positive insertion depth stop

Bonda Relief credited to Mr. Joe Bonda Sr.
Analyzer Engineer at ExxonMobil Chalmette,
Louisiana
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Stress Wake Frequency Analysis Overview
(B) SPA Quote Request Form
(C) In-house FEA Capabilities

• Calculations are based on ASME PTC 19.3 TW-2010
• Pipewells and SPAs fall outside the scope of
  the ASME PTC specification but methods for
  predicting the Frequency
• Ratio and Stress levels within the probe can be
  applied to the
• SPA in an effort to validate acceptability of the
  probe design.
• To perform the analysis it is vital to have the
  SPA Quote Request form filled out with key design
  details noted (i.e., fluid properties, geometry
  details, materials, etc.)
• For complex geometries, in-house FEA
  capabilities are also available for predicting
  Natural Frequencies Stress levels.

(A) Sample Analysis Report (one per unit)
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Laser Marked Sample Probe
Laser Markings ---DOWNSTREAM--- and
---UPSTREAM---
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Sample Probe for a Cooling Water-Free Chlorine
Analyzer
½ Sch 40 Hastelloy C276 Pipe Sample Probe
with Hastelloy C22 Sealing Gland Body and Flange
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Sample Probe with Nozzle Support Tapered Stop
Collar
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• Design Benefits of the Sample Probe Tapered Stop
  Collar

Serrated Flange Face

• Reduces flow-induced vibration by reducing the
  unsupported insertion length (U) for higher
  velocity applications
• Insures the precise insertion of the Sample
  Probe,
• Conax supplied Support Nozzle allows for a
  smaller diameter Sample Probe for Higher Pressure
  applications (pD2/4 x pressure)
• Reduces the entry of process fluids into the
  nozzle and the process valve

Dia P(psi) F(lbs)
¼ 100 19.6
? 100 29.4
½ 100 39.3
¾ 100 58.9
1 100 78.5
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Custom Engineered Sealing Glandsfor Critical
Sample Probe Applications
Extraction Port
Secondary Sealant
Primary Sealant
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Adjustable Sample Probe with Special PG Bodyand
Integral Kalrez O-Ring
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Fixed / WeldedSample Probe
Other designs
1¼ dia. x .120 wall with 2 ball valve
Injection Quill with Spray Nozzle
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Thank you for your time if you have any
questionse-mail SPA_at_conaxtechnologies.com