Parker's two-ferrule compression fitting, A-LOK® Series 3/4" NPT male connector tube fitting is designed to provide reliable leak-free connections for instrumentation, process and control, and analyzer applications that specify a two-ferrule tube fitting connection. The advantage of this tube fitting is Parker Suparcase® surface treatment technology which is an unique process that allows the 316 stainless steel be hardened without affecting, and even increasing, the corrosion resistance of the material. Parker has been using the proprietary Suparcase® process to surface harden stainless steel ferrules for over 30 years. The process achieves a carbon supersaturated surface layer by altering the oxide passive layer on the surface of the stainless steel, without any detrimental effects.

Features / Benefits of Suparcase®
• Improved Hardness. Hardness Test – Suparcased samples are at least 250% harder than their untreated counterparts
• Increased Fatigue Strength Bending Test – Suparcased samples showed 50% increase in fatigue strength with respect to the same untreated samples under the same number of cycles
• No change in shape, size or colour
• Suparcase® Layer does not crack or delaminate during forming
• Abrasion and Erosion Resistance Wear Test performed on a high pressure homogenizer made out of Stainless Steel 316 – The Suparcase® samples increased the wear and erosion resistance by 13 times in air and by 10 times in seawater with respect to their untreated counterparts
• Exceptional Corrosion Resistance. ASTM G48 - Standard Test Methods for Pitting and Crevice Corrosion Resistance of Stainless Steels and Related Alloys by Use of Ferric Chloride Solution

Industries:
• Oil & Gas
• Chemical Processing
• Trucks & Buses
• Power Generation & Renewable Energy

Features/Benefits:
• EC79 Approved for Hydrogen Service
• Parker Suparcase®
• Hardened ferrules provide leak free connections
• Silver plated nuts provide gall resistance during makeup
• Optional oxygen cleaning

316 Stainless Steel
Stainless Steels 316/316L are austenitic grades and two of the most used alloys in a variety of industrial applications. The molybdenum addition gives this grade good resistance to general corrosion and provides increased strength at elevated temperatures. The austenitic structure also gives these grades excellent toughness, even at cryogenic temperatures. Grade 316L, the low carbon version of 316, minimizes harmful carbide precipitation due to welding. It is common for 316 and 316L to be stocked in ‘Dual Certified’ form. These items have chemical and mechanical properties complying with both 316 and 316L specifications.

The corrosion resistance of stainless steel grades 316/316L is excellent in a wide range of atmospheric environments and many corrosive media. However, it is subjected to pitting and crevice corrosion in warm chloride environments, as well as to stress corrosion cracking. Initially developed for use in paper mills, 316/316L stainless steel is typically used in the following applications:

Applications:
• Instrumentation Hook-up Systems
• Analytical Installations
• CNG / LNG Lines
• Hydrogen Service
• Offshore Control Panels
• Sensing Lines