ZNLD hydrochloric acid flowmeter lining material

Performance

Maximum medium temperature

scope of application

—body type

separated

Polytetrafluoroethylene（F4)

It is the most chemically stable plastic, capable of withstanding boiling hydrochloric acid, sulfuric acid, nitric acid, and aqua regia, as well as concentrated alkali and various organic solvents. Not resistant to corrosion from chlorine trifluoride, high-temperature chlorine trifluoride, high flow rate liquid fluorine, liquid oxygen, and auto oxygen.

70℃

100℃ 150℃ (Special order required)

1Strong corrosive media such as concentrated acid and alkali. 2Sanitary media.

Perfluoroethylene propylene（F46)

sameF4The wear resistance and negative pressure resistance are higher thanF4.

ditto

Polyfluoroethylene（Fs)

The upper limit of applicable temperature is lower than that of polytetrafluoroethylene, but the cost is also lower.

80℃

neoprene

1Has excellent elasticity, high tensile strength, and good wear resistance.2Resistant to corrosion in general low concentration acid, alkali, and salt media, but not resistant to corrosion in oxidizing media.

80℃ 120℃ (Special order required)

Water, sewage, and weakly abrasive slurry.

polyurethane

1Extremely strong wear resistance.

2Poor corrosion resistance.

80℃

Neutral strong abrasion slurry, coal slurry, mud

Type of flange for ZNLD hydrochloric acid flowmeter

Scope of application

Grounding flange(Or grounding ring)

Suitable for non-conductive pipelines such as plastic pipes, but sensors with grounding electrodes do not require them.

Import protection flange

Choose when the medium has strong wear resistance.

Electrode material

Corrosion resistance and wear resistance

stainless steel0Crl8Nil2M02Ti

Used for weakly corrosive media such as industrial water, domestic water, sewage, etc., suitable for industrial sectors such as petroleum, chemical, steel, as well as municipal and environmental protection fields.

Hastelloy alloyB

It has good corrosion resistance to all concentrations of hydrochloric acid below boiling point, as well as to non chlorinated acids, bases, and non oxidizing salt solutions such as sulfuric acid, phosphoric acid, hydrofluoric acid, and organic acids.

Hastelloy alloyC

Can withstand corrosion from non oxidizing acids such as nitric acid, mixed acids, or mixed media of chromic acid and sulfuric acid, as well as oxidative salts such as:Fe，”、、Cu”Corrosion caused by or containing other oxidants, such as hypochlorite solutions above room temperature and seawater corrosion

titanium

Capable of withstanding seawater, various chlorides and hypochlorites, and oxidizing acids(Including fuming sulfuric acid)Corrosion caused by organic acids and alkalis. Not resistant to relatively pure reducing acids(Like sulfuric acid, hydrochloric acid)Corrosion, but if acid contains oxidants(Such as nitric acidFc++Cu＋＋)At this time, corrosion is greatly reduced.

tantalum

It has excellent corrosion resistance and is very similar to glass. Except for hydrofluoric acid, fuming sulfuric acid, and alkali, it can almost withstand——Cutting chemical media(Including boiling point hydrochloric acid, nitric acid, andl 50℃The following sulfuric acid)Corrosion. Dig in alkali; Corrosion resistance.

Platinum/titanium alloy

Almost capable——Cut chemical media, but not suitable for aqua regia and ammonium salts.

Stainless steel coated with tungsten carbide

Used for non corrosive and highly abrasive media.

Note: Due to the wide variety of media and the complex factors such as temperature, concentration, and flow rate that affect their corrosiveness, this table is for reference only. Users should make their own choices based on the actual situation, and if necessary, conduct corrosion resistance tests on the selected materials, such as hanging plate tests.