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Kruti
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Join Date: Oct 2014
Posts: 25

Instrument Isolation Valve Material Of Construction For Chlorine

12/08/2014 1:29 AM

Can anyone pls. suggest what shall be the preferable Instrument isolation valve Material of construction (MOC) for chlorine service?

(The chlorine service is applicable for Gas chlorination system in power plants.)
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Pathfinder Tags: chlorine Gas Chlorination valves
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Tornado
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Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

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#1

Re: Instrument isolation valve Material of construction for chlorine

12/08/2014 1:36 AM

If plastic is acceptable, PVC might work. Various low-pressure chlorine injection parts are made of it.

For metals, I think silver is used, or something similarly unusual.

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Noudge79
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#2

Re: Instrument Isolation Valve Material Of Construction For Chlorine

12/08/2014 8:05 AM

This may help Flowserve. You may contact their technical sales and support for further inquiry.

Seat material could be Reinforced Teflon or Teflon (Tetrafluoroethylene) and other parts material could be found in the pdf.

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6
Whitephone
Guru

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Location: Mineral wells Tx
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#3

Re: Instrument Isolation Valve Material Of Construction For Chlorine

12/08/2014 10:55 AM

COLE_ PARMER COMPATIBILITY (ss-304)

Chemical Selected:

Chlorine (dry)

Material

Compatibility

ABS plastic N/A
Acetal (Delrin®) D-Severe Effect
Aluminum C

1-Fair

Brass D-Severe Effect
Bronze B-Good
Buna N (Nitrile) B-Good
Carbon graphite A-Excellent
Carbon Steel B-Good
Carpenter 20 A-Excellent
Cast iron D-Severe Effect
Ceramic Al203 N/A
Ceramic magnet N/A
ChemRaz (FFKM) B-Good
Copper A-Excellent
CPVC D-Severe Effect
EPDM A-Excellent
Epoxy D-Severe Effect
Fluorocarbon (FKM) A-Excellent
Hastelloy-C® A

2-Excellent

Hypalon® D-Severe Effect
Hytrel® D-Severe Effect
Kalrez A-Excellent
Kel-F® D-Severe Effect
LDPE D-Severe Effect
Natural rubber D-Severe Effect
Neoprene C-Fair
NORYL® B

1-Good

Nylon D-Severe Effect
Polycarbonate N/A
Polyetherether Ketone (PEEK) A-Excellent
Polypropylene D-Severe Effect
Polyurethane D-Severe Effect
PPS (Ryton®) D-Severe Effect
PTFE A-Excellent
PVC D-Severe Effect
PVDF (Kynar®) A-Excellent
Silicone D-Severe Effect
stainless steel - 304 A

1-Excellent

stainless steel - 316 B-Good
Titanium D-Severe Effect
Tygon® A-Excellent
Viton® A-Excellent

Explanation of Footnotes
1. Satisfactory to 72°F (22°C)
2. Satisfactory to 120°F (48°C)
Ratings -- Chemical Effect

· A = Excellent.

· B = Good -- Minor Effect,
slight corrosion or
discoloration.

· C = Fair -- Moderate Effect,
not recommended for
continuous use. Softening,
loss of strength,
swelling may occur.

· D = Severe Effect, not recommended for ANY use.

· N/A = Information not
available.
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Crabtree
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#4

Re: Instrument Isolation Valve Material Of Construction For Chlorine

12/08/2014 2:42 PM

Use the same stuff that your pipework is made of.

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PennPiper
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#14
In reply to #4

Re: Instrument Isolation Valve Material Of Construction For Chlorine

12/31/2014 6:40 PM

Response #4 by Crabtree is the only correct answer to this Original Poster's question.

The Root (or isolation) valve must be included in the Hydrotest of the piping system. Therefore it must be the same type, rating and material as all other block/isolation valves in the system.

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Original_Macgyver
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#5

Re: Instrument Isolation Valve Material Of Construction For Chlorine

12/08/2014 3:27 PM

Depending on the Chlorine Gas pressure, I would suggest Stainless steel. For Liquid Sodium Hypochlorite we would use Stainless or CPVC, though the CPVC would get brittle after several years in service transporting the bleach.

Good luck!

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Kruti
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Join Date: Oct 2014
Posts: 25
#6

Re: Instrument Isolation Valve Material Of Construction For Chlorine

12/09/2014 12:33 AM

Any compound capable of donating free chlorine ions (Cl -) to an aqueous (water-based)solution has the potential for causing failure in stainless steels. The chlorine ion is extremelyelectronegative, and therefore very reactive with certain compounds and elements.
Preferred MOC for Isolation Valve for the Liquid/Gas chlorine line- Aluminium Silicon Bronze with Monel spindle & Teflon Washer.
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Whitephone
Guru

Join Date: Jan 2010
Location: Mineral wells Tx
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Good Answers: 34
#7
In reply to #6

Re: Instrument Isolation Valve Material Of Construction For Chlorine

12/09/2014 1:07 AM

Yes Kruti, You are Right. In Case of Chlorine water is very different. But here we have a chlorine service gas. Below the Cole- Parmer Table for Chlorine Water:

Chemical Selected:

Chlorine Water

Material

Compatibility

ABS plastic N/A
Acetal (Delrin®) D-Severe Effect
Aluminum D-Severe Effect
Brass D-Severe Effect
Bronze B-Good
Buna N (Nitrile) D-Severe Effect
Carbon graphite A-Excellent
Carbon Steel D-Severe Effect
Carpenter 20 A

2-Excellent

Cast iron N/A
Ceramic Al203 A-Excellent
Ceramic magnet A-Excellent
ChemRaz (FFKM) A-Excellent
Copper D-Severe Effect
CPVC A

2-Excellent

EPDM C-Fair
Epoxy A

1-Excellent

Fluorocarbon (FKM) D-Severe Effect
Hastelloy-C® A

2-Excellent

Hypalon® C-Fair
Hytrel® N/A
Kalrez N/A
Kel-F® A-Excellent
LDPE B

1-Good

Natural rubber C-Fair
Neoprene D-Severe Effect
NORYL® C

1-Fair

Nylon C

1-Fair

Polycarbonate N/A
Polyetherether Ketone (PEEK) D-Severe Effect
Polypropylene D-Severe Effect
Polyurethane N/A
PPS (Ryton®) D-Severe Effect
PTFE A-Excellent
PVC A

2-Excellent

PVDF (Kynar®) B-Good
Silicone D-Severe Effect
stainless steel - 304 C-Fair
stainless steel - 316 C-Fair
Titanium A-Excellent
Tygon® N/A
Viton® A-Excellent

Explanation of Footnotes
1. Satisfactory to 72°F (22°C)
2. Satisfactory to 120°F (48°C)
Ratings -- Chemical Effect

· A = Excellent.

· B = Good -- Minor Effect,
slight corrosion or
discoloration.

· C = Fair -- Moderate Effect,
not recommended for
continuous use. Softening,
loss of strength,
swelling may occur.

· D = Severe Effect, not recommended for ANY use.

· N/A = Information not
available.
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Whitephone
Guru

Join Date: Jan 2010
Location: Mineral wells Tx
Posts: 630
Good Answers: 34
#9
In reply to #6

Re: Instrument Isolation Valve Material Of Construction For Chlorine

12/09/2014 1:11 PM

If you Know, for what is your question? Troll?
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Crabtree
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#10
In reply to #6

Re: Instrument Isolation Valve Material Of Construction For Chlorine

12/09/2014 1:37 PM

If you already knew that, why did you ask the forum?

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Whitephone
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Location: Mineral wells Tx
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#11
In reply to #10

Re: Instrument Isolation Valve Material Of Construction For Chlorine

12/09/2014 2:33 PM

EHHHH......., yes, why?
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Kruti
Associate

Join Date: Oct 2014
Posts: 25
#12
In reply to #11

Re: Instrument Isolation Valve Material Of Construction For Chlorine

12/09/2014 10:35 PM

I too was searching simultaneously!!!
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Whitephone
Guru

Join Date: Jan 2010
Location: Mineral wells Tx
Posts: 630
Good Answers: 34
#13
In reply to #12

Re: Instrument Isolation Valve Material Of Construction For Chlorine

12/10/2014 2:33 AM

Is Ok for me, Thanks Kurti. WP
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2
James Stewart
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Safety - Hazmat - New Member United States - US - Statue of Liberty - New Member Engineering Fields - Chemical Engineering - Old Hand

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Location: Lubbock, Texas
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#8

Re: Instrument Isolation Valve Material Of Construction For Chlorine

12/09/2014 11:57 AM

I believe we use Carpenter-20 (CN7M, I believe) for piping from vacuum regulators on the bottles (materials there are selected by vendor), and the regulator uses PTFE valve membranes, vyton O-rings, and possibly some PVDF parts. The main body of the regulator is some sort of plastic that is typically not under continous exposure to the gas chlorine. I am not sure, but I think the eductor is made from EPDM (appears cheap, but unaffected), and the chlorine solution in water is carried by plain, ordinary 80 Schedule PVC. At least, that is how we do it where I work.

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Users who posted comments:

Crabtree (2); James Stewart (1); Kruti (2); Noudge79 (1); Original_Macgyver (1); PennPiper (1); Tornado (1); Whitephone (5)

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