Hot Products
Equal and Reducing Butt-welding Tee and Cross Pipe Fittings from China Suppliers and Factory, ASME B16.9
⚙️ 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 ASTM A234 WPB and WPC carbon steel?
Both WPB and WPC are carbon steel pipe fittings grades under ASTM A234. WPB is the most commonly used general-purpose grade, while WPC has slightly higher minimum tensile and yield strength requirements, making it suitable for more demanding pressure applications.
Q
What is the difference between WP304 and WP304L stainless steel?
WP304L is the low-carbon version of WP304. The reduced carbon content in WP304L minimizes the risk of carbide precipitation during welding, making it a better choice for welded assemblies that require enhanced corrosion resistance.
Q
When should Duplex or Super Duplex stainless steel be selected?
Duplex (UNS S31803) and Super Duplex (UNS S32750, UNS S32760) stainless steels are recommended for highly corrosive environments such as offshore, chemical processing, and seawater applications. They offer superior strength and resistance to stress corrosion cracking compared to standard austenitic grades.
Q
What surface treatment is best for outdoor or high-humidity environments?
Hot-dip galvanizing provides the most durable corrosion protection for outdoor or high-humidity environments, as it creates a thick, metallurgically bonded zinc coating. Electric galvanizing offers a thinner, more uniform finish suitable for moderate environments, while anti-rust oil is typically used for short-term protection during storage and transport.
Q
What alloy steel grades are suitable for high-temperature service?
For high-temperature applications, ASTM A234 grades such as WP11, WP22, WP9, and WP91 are commonly specified. WP91 in particular is widely used in power generation and petrochemical industries due to its excellent creep resistance at elevated temperatures.
Q
Which material grade is recommended for low-temperature service?
ASTM A420 grades — WPL9, WPL3, and WPL6 — are specifically designed for low-temperature service. WPL6 is suitable down to -50°F (-46°C), WPL3 down to -150°F (-101°C), and WPL9 offers performance at even lower temperatures, making them ideal for cryogenic and cold climate pipeline systems.