SCH8O/DIN One-piece Flange Ball Valve

Application of one-piece flange ball valve in the chemical industry: corrosion-resistant design and safety specifications

One-piece flange ball valves are widely used in the chemical industry and related fields due to their compact structure, good sealing, and convenient operation. Since chemical media often have strong corrosiveness, high temperature and high pressure or high purity requirements, the corrosion-resistant design and safety specifications of the valve are crucial. The following are the specific applications and technical requirements of this valve in multiple key industries:

1. Chemical industry (strong corrosive environment)
Chemical production often involves corrosive media such as acids, alkalis, and organic solvents. One-piece flange ball valves must use corrosion-resistant materials (such as 316L stainless steel, Hastelloy, PTFE lining, etc.) and comply with API 607 ​​fireproof certification to ensure safety under leakage or extreme working conditions.

2. Drinking Water (Safe Drinking Water)
When the valve contacts drinking water, it must meet sanitary standards such as NSF/ANSI 61. The material is usually 304/316 stainless steel or EPDM seal to avoid heavy metal precipitation and ensure water quality safety.

3. Metallurgy
In high temperature and dusty environments, valves need to be wear-resistant and heat-resistant (such as carbon steel + carbide coating), suitable for blast furnace gas and molten metal pipeline systems.

4. Photovoltaic
In the transportation of polysilicon and electronic-grade chemicals, valves need to be ultra-high purity (electropolished inner wall) and low particle precipitation to avoid contamination of process media.

5. Nuclear Power
Nuclear-grade valves must comply with ASME III standards, use radiation-resistant materials (such as austenitic stainless steel), and pass seismic tests to ensure long-term stable operation in the nuclear island.

6. Electronic Semiconductor
In the transportation of ultrapure water (UPW) and special gases, valves need to be zero-leakage (ISO 15848 certified) and have no dead angle design to prevent particle or gas contamination.

7. Medicine
The pharmaceutical industry requires aseptic design (such as SIP/CIP compatibility), and the material must comply with FDA certification to avoid microbial growth. It is suitable for fermentation tanks and purified water systems.

8. Industrial Water Treatment
Covering cooling water and circulating water systems, the valve must be resistant to chloride ion corrosion (such as duplex stainless steel) and adapt to frequent opening and closing conditions.

9. Industrial Wastewater
For acidic, alkali, and high-salt wastewater, the valve must be corrosion-resistant + wear-resistant (such as fluorine-lined ball valves), and the sealing material (such as PTFE) must be aging-resistant.

Key points of safety regulations
Material selection: Match the material according to the characteristics of the medium (such as Hastelloy for acidic media and nickel-based alloy for alkaline media).
Sealing technology: Use metal seal + soft seal dual design to ensure zero leakage (such as ISO 5208 Class VI).
Fire and explosion protection: Meet API 6FA standards, blowout-proof stem design.
Industry certification: such as NSF for drinking water, ASME for nuclear power, SEMI F81 for semiconductors, etc.