Stainless Steel 304/316 Butt Weld 90° Elbow | ASME B16.9 | LR/SR | DN15-DN1200 | Industrial Pipe Fitting

Product Overview

The Stainless Steel 304/316 Butt Weld 90° Elbow is a key piping component used to change the direction of flow within a piping system. Featuring a 90-degree angle and a butt-weld connection method, it ensures a secure and reliably sealed joint. Manufactured in strict accordance with international standards such as ASME B16.9, the product is available in standard Long Radius (LR, R=1.5D) and Short Radius (SR, R=1D) series. Additionally, custom bending radii—such as 3D, 4D, 5D, 6D, 10D, and 20D—are available to flexibly meet diverse piping design requirements.

Materials include stainless steel, duplex stainless steel, and nickel-based alloys, capable of withstanding demanding operating conditions ranging from corrosive media to high-temperature and high-pressure environments. Surface treatment options include pickling, passivation, sandblasting, polishing, and bright annealing, making the elbows suitable for piping systems across industries such as chemical processing, pharmaceuticals, food production, marine engineering, and power generation.

Stainless Steel 304/316 Butt Weld 90° Elbow

Technical Specifications

Stainless Steel 304/316 Butt Weld 90° Elbow

Key Features

◆ Full Material Coverage for Demanding Conditions
Materials cover Stainless Steel (304/304L, 316/316L, 321, 310S, 904L, etc.), Duplex Steel (31803, 32205, 32750, etc.) and Nickel Alloys (Inconel, Incoloy, C-276, Monel 400, Alloy 20, etc.) – meeting extreme demands in chemical, marine and high-temperature high-pressure applications.

◆ 90° Standard Angle with Multiple Bending Radius Options
Standard 90° turn, available in LR (R=1.5D) and SR (R=1D) series, plus custom 3D, 4D, 5D, 6D, 10D, 20D and other non-standard radii for compact spaces or special fluid dynamics requirements.

◆ Precision Butt-Weld Connection, Permanent Leak-Free Sealing
Butt-weld connection offers joint strength equal to base metal with zero leak risk – ideal for high-temperature, high-pressure and vibration conditions; the preferred connection method in petrochemical and power industries.

◆ Multiple Surface Finishes for Various Grade Requirements
Pickling, passivation, sand blasting, polishing and bright annealing available. Pickling/passivation restores corrosion resistance; polishing achieves mirror finish (Ra≤0.4μm) for sanitary clean piping in pharmaceutical and food applications.

◆ International Standards Certified for Global Projects
Compliant with ASME B16.9, EN10253-4, DIN 2605, GOST 17375-2001, JIS B2313 and more – compatible with projects worldwide across Europe, America, Middle East and Southeast Asia.

Stainless Steel 304/316 Butt Weld 90° Elbow

Applications

Stainless steel/alloy steel butt weld 90° elbows are widely used in various industrial systems requiring pipe direction changes:

• Chemical & Petrochemical Industry: Reactor piping, separator connections, directional turns in corrosive media transmission lines
• Pharmaceutical & Food Industry: Sanitary sterile piping systems, clean fluid transmission, CIP/SIP cleaning pipelines
• Marine Engineering & Shipbuilding: Seawater cooling systems, ballast water pipelines, offshore platform process lines (chloride-resistant)
• Power & Energy Industry: Boiler piping systems, steam networks, nuclear power cooling circuits
• Oil & Gas Industry: Oil/gas gathering pipelines, station process piping, high-pressure gas transmission
• Cryogenic & Low-Temperature Applications: LNG terminals, air separation units, cryogenic liquid transmission pipelines

Typical installations include vertical pipe turns, equipment inlet/outlet connections, pipe rack corners, and pipe routing in space-constrained areas.

Packing and Shipment

Packing Method

• Small-diameter elbows (DN15-DN200): Packed in export-standard carton boxes or wooden cases with cushioning materials
• Large-diameter elbows (DN250-DN1200): Packed in fumigation-free wooden crates or steel-framed cases with protective caps on bevel ends
• Surface Protection: Polished/bright annealed products wrapped with wax-free paper plus plastic film
• Pallet Securing: Loaded on wooden pallets and fastened with steel straps for long-distance stability
• Customized packing solutions available upon request

Shipment Method

• Supported by sea, railway, air, or land transport
• Container loading and securing services available
• Partnered with long-term stable logistics providers to ensure timely delivery

Stainless Steel 304/316 Butt Weld 90° Elbow

Payment Terms

• T/T, L/C at sight, Western Union, PayPal, Credit Card, etc.

Company Profile

Luoyang Datang Energy Tech Co., Ltd is a professional industrial valve supplier, dedicated to providing reliable flow control solutions for water treatment, chemical, oil & gas, HVAC, and industrial piping systems worldwide. All products are manufactured to international standards with CE and ISO 9001 certifications. With over 10 years of experience, a modern facility of 80,000 m², and 200+ professional employees, we serve customers in 10+ countries with quality products, competitive pricing, and reliable delivery.

FAQ

Q1: How to choose between LR and SR elbows?

LR elbow (R=1.5D) offers larger radius, lower flow resistance and less wear – preferred for high-pressure, high-temperature, high-velocity and solids-bearing media. SR elbow (R=1D) has smaller radius, saves space – suitable for space-limited or low-pressure non-critical applications, but higher flow resistance.

Q2: How to select between 304/316L, duplex steel and nickel alloy?

304 suits general water, gas and mild corrosive environments. 316L with molybdenum offers better pitting resistance than 304 for chemical and marine applications. Duplex (2205/2507) provides high strength and excellent stress corrosion resistance for high-temperature chloride-rich conditions. Nickel alloy (C-276/Inconel) resists extreme acids and high-temperature oxidation for severely corrosive high-temperature environments.

Q3: What are the applications for polished vs. pickled/passivated surfaces?

Pickling/passivation removes welding HAZ oxide scale and restores corrosion resistance – suitable for most chemical and petrochemical applications. Polishing achieves Ra≤0.4μm surface finish, reduces media adhesion and bacterial growth – suitable for sanitary clean piping in pharmaceutical, food and bioengineering applications.

Q4: How to select wall thickness for butt-weld elbows?

Wall thickness is calculated per ASME B31.3 or GB/T 20801 based on design pressure, temperature and corrosion allowance. Standard chemical piping uses SCH10S/SCH40S; high-pressure uses SCH80S and above; corrosive media require additional corrosion allowance in selection.

Stainless Steel 304/316 Butt Weld 90° Elbow