Nickel Alloy Flat Welding Flange Hastelloy B3 Flanges For Reactor Pressure Vessel Atomic Energy

Nickel Alloy Flat Welding Flange Hastelloy B2 Calcining Furnace Heat Treatment

Nickel Alloy Flange, also known as a flange rim or flange, is a part that connects pipes to each other at the ends, and it is also used on equipment inlets and outlets for connecting two pieces of equipment, such as a reducer flange. A flange connection or flange joint refers to a detachable connection consisting of a flange, gasket, and bolt, which together form a combined sealing structure.

Welding Process:

• Required Equipment: A set of manual arc welding equipment, one handle-type angle grinder, one electric air hammer, and one straight edge.
• Folding Welding Preparation: 1. Check and adjust the equipment to ensure normal operation; 2. Prepare φ4.0 J402 welding rods, which are preferably dried at 300°C - 350°C for one hour.
• Folding Welding Process: 1. Assemble the cone and the large flange according to the drawing requirements, then divide the large flange into 8 equal parts;  2. Welding due to the thicker flange and larger groove, the use of segmental symmetrical, multi-layer welding is adopted.
• Folding Welding Quality Requirements: The weld strength must at least match the strength of the base material. The weld surface should be flat and smooth, without defects such as burn-through, porosity, welding leaks, slag inclusion, undercutting, or incomplete welding. The weld reinforcement height should be less than 2mm.
• Folding Notes for Attention: 1. When welding the base layer, always use J506 welding rod manual surfacing and welding with a small current. Strictly follow the welding process; 2: After welding each position, use a level to check the deformation of the flange plane; 3: While welding, use the air hammer to strike the weld to eliminate stress.

Hastelloy B3:

This Nickel-Molybdenum alloy gives excellent resistance to hydrochloric acid at all concentrations and temperatures from ambient to high. It also withstands sulphuric, acetic, formic and phosphoric acids and other non-oxidizing media. B-3 also has excellent resistance to pitting corrosion and to stress-corrosion cracking. Hastelloy B-3 is not recommended in the presence of ferric or cupric salts. Like other nickel alloys, Hastelloy B-3 is ductile and can be formed and welded. It resists stress corrosion cracking in chloride-bearing solutions, and is able to withstand fluoride-bearing media and concentrated sulfuric acid, both of which result in damage to zirconium alloys.

Key Features:

Hastelloy B-3 offers the following key features:

• Excellent corrosion resistance to hydrochloric acid at all concentrations and temperatures
• Withstands sulphuric, acetic, formic & phosphoric acids & other non-oxidising media
• Excellent resistance to pitting corrosion & stress corrosion cracking

Typical Applications:

• Chemical Industry: Hastelloy B3 alloy is widely used in the chemical industry for handling strong acid environments such as sulfuric acid, hydrochloric acid, nitric acid, etc. It has excellent corrosion resistance properties, enabling it to withstand the attack of corrosive media. It can be used in the manufacturing of reactors, heat exchangers, pipes, and storage tanks.
• Oil and Gas Industry: Hastelloy B3 alloy is used in the oil and gas industry for handling media containing sulfides. It can resist sulfide corrosion and is suitable for manufacturing oil well equipment, pipelines, valves, and storage tanks.
• Chemical Production: Hastelloy B3 alloy plays a significant role in chemical production, particularly in processes that produce strong acids like hydrochloric acid. It provides excellent corrosion resistance.
• Environmental Pollution Control: Hastelloy B3 alloy is crucial in the field of environmental pollution control. It can resist the corrosion of strong acid wastewater and waste gases, making it suitable for manufacturing wastewater treatment equipment and gas purification equipment.

Designations:

W.Nr 2.4600
UNS N10675
AWS 051

Specifications:

ASTM B335
ASTM B619

FORMS
 

Coil -Sheet, Strip, Foil Wire -Profile, Round,Flat, Square, Flange

Chemical Composition:

Designation and standards:

The typical mechanical properties of Hastelloy B3:

Processing Flow Chart: