Hot Products
China Suppliers Factory for ASME B16.9 Seamless Carbon Steel Sch 40 Butt-welding Elbows in Various Sizes
Material Grade
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Carbon Steel
ASTM A234 WPB, WPC; ASTM A420 WPL9, WPL3, WPL6
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Stainless Steel
ASTM A403 WP304/304L, WP316/316L, WP321, WP347
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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 material grades are available for pipe fittings?
We supply pipe fittings in Carbon Steel (ASTM A234 WPB, WPC; ASTM A420 WPL9, WPL3, WPL6), Stainless Steel (ASTM A403 WP304/304L, WP316/316L, WP321, WP347), and Alloy Steel (ASTM A234 WP1, WP12, WP11, WP22, WP5, WP9, WP91), as well as Duplex and Super Duplex Stainless Steel grades.
Q
What is the difference between WP304 and WP304L stainless steel?
WP304L is a low-carbon version of WP304. The reduced carbon content minimizes carbide precipitation during welding, making WP304L more suitable for applications requiring welding and better corrosion resistance in certain environments.
Q
What surface treatments are available for pipe fittings?
We offer four surface treatment options: anti-rust oil, black paint, electric galvanized, and hot-dip galvanized. Each treatment provides different levels of corrosion protection to suit various application and environmental requirements.
Q
What is the advantage of hot-dip galvanized over electric galvanized?
Hot-dip galvanizing produces a thicker zinc coating compared to electric galvanizing, offering superior long-term corrosion protection. It is generally recommended for outdoor or harsh environment applications, while electric galvanizing provides a smoother finish suitable for lighter-duty or decorative purposes.
Q
Are Duplex and Super Duplex stainless steel fittings available?
Yes. We supply Duplex (UNS S31803) and Super Duplex (UNS S32750, UNS S32760) stainless steel pipe fittings per ASTM A815. These grades offer excellent strength and outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking, making them ideal for demanding industrial applications.
Q
Which material grade is recommended for low-temperature service?
For low-temperature service, ASTM A420 grades (WPL9, WPL3, WPL6) are specifically designed and tested to maintain toughness at sub-zero temperatures. These carbon steel grades are commonly used in cryogenic and cold-weather pipeline applications.