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.

70℃

100 ℃ 150 ℃ (special order required)

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

Perfluoroethylene propylene (F46)

Same as F4, its wear resistance and negative pressure resistance are higher than F4.

ditto

Polyfluoroethylene (Fs)

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

80℃

neoprene

1. Has excellent elasticity, high tensile strength, and good wear resistance. 2. Resistant 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

1. Extremely strong wear resistance.

2. Poor corrosion resistance.

80℃

Neutral strong abrasion slurry, coal slurry, mud

Types of flanges for intelligent electromagnetic flow meters

Scope of application

Intelligent electromagnetic flowmeter 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 steel 0Crl8Nil2M02Ti

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 B

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 C

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 corrosion from oxidizing salts such as Fe, Cu, or other oxidants, such as hypochlorite solutions above room temperature and seawater corrosion

titanium

Capable of withstanding corrosion from mechanical acids and alkalis. Not resistant to the corrosion of relatively pure reducing acids (such as sulfuric acid, hydrochloric acid), but if the acid contains oxidants (such as nitric acid, Fc++, Cu++), the 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 corrosion from cutting chemical media (including boiling point hydrochloric acid, nitric acid, and sulfuric acid below 50 ℃). Dig in alkali; Corrosion resistance.

Platinum/titanium alloy

Almost capable of cutting 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.