Seamless Carbon Steel Concentric & Eccentric Pipe Reducers - China Suppliers & Factory, ASME B16.9 Standards
Material Grade
⚙️
Carbon Steel
ASTM A234 WPB, WPC | ASTM A420 WPL9, WPL3, WPL6
🔩
Stainless Steel
ASTM A403 WP304/304L, WP316/316L, WP321, WP347
🏗️
Alloy Steel
ASTM A234 WP1, WP12, WP11, WP22, WP5, WP9, WP91 | Duplex & Super Duplex Stainless Steel | ASTM A815 UNS S31803, UNS S32750, UNS S32760
Surface Treatment
- 🛡️ Anti-rust Oil
- 🖤 Black Paint
- ⚡ Electric Galvanized
- 🔥 Hot-dip Galvanized
Frequently Asked Questions
Q
What is the difference between Carbon Steel ASTM A234 WPB and WPC?
ASTM A234 WPB and WPC are both carbon steel pipe fittings grades. WPB is the most commonly used grade for standard applications, while WPC offers slightly higher tensile and yield strength, making it suitable for more demanding pressure conditions.
Q
What are the advantages of using Duplex and Super Duplex Stainless Steel?
Duplex (UNS S31803) and Super Duplex (UNS S32750, UNS S32760) stainless steels offer a superior combination of high strength and excellent corrosion resistance, particularly against chloride stress corrosion cracking. They are ideal for use in offshore, chemical processing, and marine environments.
Q
What is the difference between WP304 and WP304L stainless steel?
WP304L is the low-carbon version of WP304. The reduced carbon content in 304L minimizes carbide precipitation during welding, which significantly improves its resistance to intergranular corrosion. 304L is preferred in applications involving welding or exposure to corrosive environments.
Q
What surface treatment is recommended for carbon steel pipe fittings used outdoors?
For outdoor applications, hot-dip galvanizing is generally the most recommended surface treatment for carbon steel pipe fittings. It provides a thick, durable zinc coating that offers long-term protection against rust and corrosion even in harsh weather conditions.
Q
What is the application range of Alloy Steel ASTM A234 WP91?
ASTM A234 WP91 is a creep-resistant alloy steel grade designed for high-temperature and high-pressure service. It is widely used in power generation plants, boiler systems, and petrochemical industries where operating temperatures can exceed 600°C (1112°F).
Q
What is the difference between electric galvanizing and hot-dip galvanizing?
Electric galvanizing (electroplating) deposits a thinner, more uniform zinc layer, providing a smoother surface finish suitable for light-duty corrosion protection. Hot-dip galvanizing immerses the part in molten zinc, creating a much thicker coating that offers superior and longer-lasting corrosion resistance, especially for heavy-duty or outdoor applications.









