Steam Sample Conditioning and Collection

Mechatest SWAS-SWAN Panel ASME PTC 19.11 Steam and Water Sampling Conditioning

Steam & Water SamplE Conditioning

Sample Conditioning Panels built as per standard ASME PTC 19.11 and/or VGB/DGRL. For proper conditioning of your steam and water samples, we take care from sample tap to sampling conditioning and analysis.

Mechatest standard sample conditioning panels for steam and water sampling purposes, the objective of water and steam sample conditioning is to modify and control sample temperature, pressure, and flow rate from the sample source to delivery for grab sampling or on-line analysis.  For apllications Demi Water, Feedwater, Condensate, Boiler Water, LP Drum Water, LP/HP Steam, Life Steam, Main Steam Demi Water, Feedwater, Condensate, Boiler Water, LP Drum Water, LP/HP Steam, Life Steam, Main Steam for power stations.

This kind of sampling panels are mostly used in combination with water analyser equipment for analysis on chemical parameters like conductivity, pH, dissolved Oxygen, Silica, Sodium etc.

The systems can be ordered in four versions (low or high pressure and low or high temperature) in combination with several options.

Mechatest SWAS-SWAN Panel ASME PTC 19.11 Steam and Water Sampling Conditioning P&ID

Mechatest SWAS Rack - Steam & Water Analysis Systems
Mechatest SWAS Rack - Steam & Water Analysis Systems

Predesigned SCS for water condensate measurement applications.  

  • Compact design with best selection of top of the world fabricate components 
  • Efficient temperature cooling with Sentry sample coolers, pressure reduction with Sentry VREL and flow control
  • Grab sample capability
  • Including Swan Back Pressure Regulator BPR for constant pressure and sample flow for up to 4 water analyzer applications
  • Custom options are available to fit your needs
  • Manufactured by Mechatest Sampling Solutions.

Steam Sampling Standards

  • ASME PTC 19.11-2008 Steam and Water Sampling, Conditioning, and Analysis in the Power Cycle
  • ASTM D1066 Standard practice for Sampling Steam
  • ASTM D1192 / D3370 Standard Guide for Equipment and Practices for Sampling Water and Steam
  • SO 5667.7 Water Quality-Sampling – Part 7: Guidance on sampling of water and steam in boiler plants

 

Download
Brochure Mechatest Steam and Water Analysis Systems (SWAS)
Mechatest SWAS Systems.pdf
Adobe Acrobat Document 229.7 KB


Steam Sample Panel Selector

Type P&T Specifications Typical Application
LPMT Low Pressure & Medium Temperature

max. 35 bar @ 232 °C

• Single phase max. flow 72 L/h

• Demi Water

• Feedwater

• Condensate

• Boiler Water

LPHT Low Pressure & High Temperature

max. 35 bar @ 538 °C

• Single phase max. flow 108 L/h

• Steam phase max. flow 60 L/h

• Demi Water

• Feedwater

• Condensate

• Boiler Water

• LP/HP Steam

• Life Steam 

HPMT High Pressure & Medium Temperature

max. 345 bar @ 232 °C
• Single phase max. flow 72 L/h

• Demi Water

• Feedwater

• Condensate

• Boiler Water

HPHT High Pressure & High Temperature

max. 345 bar @ 538 °C

• Single phase max. flow 108 L/h

• Steam phase max. flow 60 L/h

• Demi Water

• Feedwater

• Condensate

• Boiler Water

• LP/HP Steam

• Life Steam 

HPXT High Pressure & Extreme High Temperature

max. 345 bar @ 600 °C

• Single phase max. flow 108 L/h

• Steam phase max. flow 60 L/h

 

• HP Steam

• Life Steam 

HPHF High Pressure & Extreme Flow

max. 345 bar @ 538 °C

• Single phase max. flow 210 L/h

• Steam phase max. flow 120 L/h

• Demi Water

• Feedwater

• Condensate

• Boiler Water

• LP/HP Steam

• Life Steam 

HPXF High Pressure & Extreme Flow

max. 345 bar @ 538 °C

• Single phase max. flow 300 L/h

• Steam phase max. flow 120 L/h

• Demi Water

• Feedwater

• Condensate

• Boiler Water

• LP/HP Steam

• Life Steam 

     
Mechatest - Steam Sample Panel Selector
Mechatest - Steam Sample Panel Selector

Steam Cooling Panel - LPMT

Low Pressure, Low Temperature Steam Sample Panel

 

Sample pressure (recommended) < 35 bar
Sample temperature (recommended) Max. 250°C
Flow single phase samples (Water / Condensate) Max. 72 L/h
Flow condensing samples (Steam) Not recommended
Cooling water flow Max. 1100 L/h
Sample tube length and cooling area 1/4" OD - Approx. 5.5 m (0.11 m2)
Download
Steam sampling cooling panel
Mechatest SCS LPMT.pdf
Adobe Acrobat Document 244.8 KB
Mechatest Steam Sampling Panel LPHT


Steam Cooling Panel - LPHT

Low Pressure, High Temperature Steam Sample Panel

 

Sample pressure (recommended) < 35 bar
Sample temperature (recommended) Max. 538°C
Flow single phase samples (Water / Condensate) Max. 108 L/h
Flow condensing samples (Steam) Max. 60 L/h
Cooling water flow Max. 1500 L/h
Sample tube length and cooling area 1/4" OD - Approx. 11 m (0.22 m2)
Download
Steam sampling cooling panel
Mechatest SCS LPHT.pdf
Adobe Acrobat Document 244.7 KB
Mechatest Steam Sampling Panel LPHT


Steam Cooling Panel - HPMT

High Pressure, Low Temperature Steam Sample Panel

 

Sample pressure (recommended) > 35 bar (max. 345 bar)
Sample temperature (recommended) Max. 250 °C
Flow single phase samples (Water / Condensate) Max. 72 L/h
Flow condensing samples (Steam) Not recommended
Cooling water flow Max. 1100 L/h
Sample tube length and cooling area 1/4" OD - Approx. 5.5 m (0.11 m2)
Download
Steam sampling cooling panel
Mechatest SCS HPMT.pdf
Adobe Acrobat Document 244.5 KB
Mechatest Steam Sampling Panel HPHT


Steam Cooling Panel - HPHT

High Pressure, High Temperature Steam Sample Panel

 

Sample pressure (recommended) > 35 bar (max. 345 bar)
Sample temperature (recommended) Max. 538°C
Flow single phase samples (Water / Condensate) Max. 108 L/h
Flow condensing samples (Steam) Max. 60 L/h
Cooling water flow Max. 1500 L/h
Sample tube length and cooling area 1/4" OD - Approx. 11 m (0.22 m2)
Download
Steam sampling cooling panel
Mechatest SCS HPHT.pdf
Adobe Acrobat Document 243.8 KB
Mechatest Steam Sampling Panel HPHT


Steam Cooling Panel - HPXT

High Pressure, High Temperature Steam Sample Panel

 

Sample pressure (recommended) > 35 bar (max. 345 bar)
Sample temperature (recommended) Max. 600°C
Flow single phase samples (Water / Condensate) Max. 108 L/h
Flow condensing samples (Steam) Max. 60 L/h
Cooling water flow Max. 1500 L/h
Sample tube length and cooling area 1/4" OD - Approx. 11 m (0.22 m2)


Steam Cooling Panel - HPHF

High Pressure, High Flow Steam Sample Panel

• Multi stream (up to 4) analysers

 

Sample pressure (recommended) > 35 bar (max. 345 bar)
Sample temperature (recommended) Max. 538°C
Flow single phase samples (Water / Condensate) Max. 210 L/h
Flow condensing samples (Steam) Max. 120 L/h
Cooling water flow Max. 1500 L/h
Sample tube length and cooling area 3/8" OD - Approx. 11 m (0.33 m2)
Download
Steam sampling cooling panel
Mechatest SCS HPHF.pdf
Adobe Acrobat Document 246.8 KB
Mechatest Steam Sampling Panel HPHT


Steam Cooling Panel - HPXF

High Pressure, High Flow Steam Sample Panel

• Multi stream (up to 6) analysers

 

Sample pressure (recommended) > 35 bar (max. 345 bar)
Sample temperature (recommended) Max. 538°C
Flow single phase samples (Water / Condensate) Max. 300 L/h
Flow condensing samples (Steam) Max. 120 L/h
Cooling water flow Max. 2700 L/h
Sample tube length and cooling area 3/8" OD - Approx. 15 m (0.44 m2)
Download
Steam sampling cooling panel
Mechatest SCS HPXF.pdf
Adobe Acrobat Document 731.1 KB
Mechatest Steam Sampling Panel HPHT


Steam Sampling Components

Steam Sample Coolers

  • Single Helical Tube Sample Cooler
  • Design accordingly ASME PTC 19.11 and VGB/DGRL
  • Compact, high efficiency sample coolers for cooling high temperature/high pressure liquid or gas samples
  • Temperature ratings to 593°C at 345 barg (1100°F at 5000 psig)
  • Models available for ultra-supercritical power plants with temperature ratings to 621°C at 356 barg (1150°F at 5175 psig)
  • Exotic materials such as titanium, Inconel® and Hastelloy® on the tube side, and Monel®, cupronickel, and stainless steel on the shell side are available
  • Highest efficiency sample cooler commercially available
  • Various configurations available to meet EPRI/ASTM/ASME sampling guidelines
  • Many models are available with ASME section VIII code stamp, CE or CRN registrations
  • No dead spots or crevices 
  • Sample flow rates up to 5.7 liters per minute (1.5 gallons per minute GPM); for higher flow rates see
Mechatest Sampling - Sentry Steam Cooler
Sentry Steam Cooler


Steam Pressure Reducing Valve Sentry VREL

  • High Pressure Sample Flow Control Valve
  • The VREL® is an adjustable sample pressure reducer for sample pressures above 34.5 barg (500 psig) according to  ASME PTC 19.11 and the Annual Book of ASTM Designation D3370. A precisely machined tapered rod assembly moves inside precision holes within the barrel of the VREL®. Pressure drop is a function of the length of the rods inserted into the barrel.
Mechatest Sampling - Pressure Reducing Valve Sentry VREL
Pressure Reducing Valve Sentry VREL


Sentry Thermal Shutoff Valve (with reset button)

  • Shuts down high temperature sample in less than 5 seconds.
  • Need to reset by push button after sample is cooling down
  • Protect operators, analyzers and sampling components from high temperature liquids with a Sentry Thermal Shutoff Valve. The sensor/actuator is directly exposed to the sample, providing quick reaction time. Economical and highly reliable replacement for solenoid shutoff valve and temperature controller.
  • Suitable for system pressures up to 4400 psi (303 bar)
  • Totally mechanical design requires no electricity, air, or hydraulics
  • Optional dry contact for remote indication
  • Standard trip temperature is 120ºF (49ºC) with other temperatures available
  • 316 Stainless Steel construction
Mechatest Sampling - Thermal Shutoff Valve TSV Sentry
Thermal Shutoff Valve TSV


Thermal Shutoff Valve (automatic)

  • Thermal Shutoff Valve (automatic)
  • ThermOmegaTech
  • Protects expensive and delicate sample analyzers
  • Automatically resets when sample cools
  • No outside power required
  • Superior value vs. more expensive electric valves

Design Features

  • Self-operating thermal actuator controls flow based on fluid temperature
  • Operating temperatures unaffected by variable inlet pressures
  • Wide choice of setpoints available
  • Ram-type plug provides tight shutoff
  • Corrosion resistant: all stainless steel construction

Typical Applications

  • Excessively hot samples can cause damage to expensive and sensitive hardware and electronics. For process analyzers and similar instrumentation, it is important to assure that the process samples fluids are always below the maximum allowable temperature for such instruments. Sample coolers are commonly used to reduce sample temperatures to the acceptable limits. In the event of a loss of cooling fluid to the sample cooler, or if the desired sample temperature is exceeded for any reason, the HST valve will close to prevent equipment damage. HST valves are covered with our standard 36 month prorated warranty.
Mechatest Sampling - Thermomegatech Thermal Shutoff Valve TSV
Thermal Shutoff Valve TSV

Operation

 

  • The HST (High Sample Temperature) safety shutoff valve is used to sense the sample temperature after the sample cooler. The sample passes through this normally open valve whenever the sample temperature is below the valve setpoint. If the sample temperature exceeds the valve setpoint, the HST closes to protect expensive and delicate analyzers and other instruments from overtemperature damage. When the HST cools below the setpoint, it will automatically reset open again. 


Refillable Cation Exchange Resin Columns

  • Minimize "dead volume" assuring representative samples
  • Three models* (RC-100, RC-200 and RC-400) meet your specific requirements, withstanding the demands of power plants
  • Column(s) provide optimum fluid velocity with increased resin efficiency
  • Color-changing resin gives quick visual indication of resin depletion level
  • Twist-off cap for easy resin refill with available pre-sized Sentry resin refill packets 
  • No PVC; wetted materials will not leach chlorides or plasticizers
Mechatest Sampling - Sentry Cationic Columns
Sentry Cationic Columns


Location of Steam Sample Tap Point


Samples must be taken from locations that are representative of the water source, steam boiler, treatment plant, points at which water is delivered to the consumer, and points of use. Design sampling points accordingly ASME PTC 19.11, each locality should be considered individually; however, the following general criteria are usually applicable:

Sampling points should be selected such that the samples taken are representative of the different sources from which water is obtained by the public or enters the system. 
These points should include those that yield samples representative of the conditions at the most unfavourable sources or places in the supply system, particularly points of possible contamination such as unprotected sources, loops, reservoirs, low-pressure zones, ends of the system, etc.
Sampling points should be uniformly distributed throughout a piped distribution system, taking population distribution into account; the number of sampling points should be proportional to the number of links or branches.
The points chosen should generally yield samples that are representative of the system as a whole and of its main components.
Sampling points should be located in such a way that water can be sampled from reserve tanks and reservoirs, etc.
In systems with more than one water source, the locations of the sampling points should take account of the number of inhabitants served by each source.
There should be at least one sampling point directly after the clean-water outlet from each treatment plant.

Isokinetic Sampling Probes For Steam Applications

  • EPRI Isokinetic Sampling Nozzles (Probes)
  • Ideal for saturated steam, superheated steam, and water sampling in steam and power plants.  
  • These nozzles meet the requirements of ASTM Standards D1066, ASTM D3370 and ASME PTC 19.11.
  • The nozzles extract a representative isokinetic sample from a flow region removed from the pipe surface and at the average flow velocity of the sample fluid.  
  • This arrangement results in the withdrawal of the sample with representative concentrations of dissolved, suspended, and volatile constituents.
  • An appropriate nozzle (probe) is designed for the desired sample flow and typical conditions of the sample fluid.  When the flow velocity through the pipe changes, sample flow should be adjusted to maintain isokinetic sampling.
  • Each Nozzle (probe) is designed with considerations of vortex shedding, resonance, vibration, erosion, and strength of the attachment to the pipe.
Mechatest Sampling - EPRI Isokinetic Sampling Nozzles (Probes)
EPRI Isokinetic Sampling Nozzles (Probes)