An instrumentation valve selection guide comparing ball, needle, check, and bonnet valves by function, flow, and service. Spec the right valve with Collins-Oliver in Baton Rouge.

A selection reference for quick-connect couplings for instrumentation: coupling types, shut-off styles, materials, sizing, and pressure ratings. Call Collins-Oliver, your authorized DK-LOK distributor in Baton Rouge, for a quote.

A guide to stainless steel grades for fittings: 316 vs 316L vs super duplex vs Alloy 20. Compare composition, corrosion resistance, and cost. Spec with Collins-Oliver in Baton Rouge.

A tube fitting sizing chart with fractional and metric tube OD reference. Convert inch to mm, avoid mismatches, and get the right DK-LOK fitting from Collins-Oliver.

A weld fittings guide comparing socket weld, butt weld, and pipe weld ends: standards, sizes, pressure class, and when to pick each. Call Collins-Oliver, your authorized DK-LOK distributor in Baton Rouge, for a quote.

A guide to hose fittings and assemblies: hose types, end connections, and how to select by pressure, media, and temperature. Spec hose assemblies with Collins-Oliver in Baton Rouge.

TL;DR Hose fittings connect flexible rubber or braided hoses. Tube fittings connect rigid metal tubing. If your line bends without bending the metal, you need a hose fitting. If your […]

A DK-LOK part number decoder for twin-ferrule fittings. Read body codes (MC, U, L, T, X), material suffixes (-S, -B, -C), and thread codes (-N). Order right with Collins-Oliver.

TL;DR Parker and Swagelok both make double-ferrule compression fittings. They look similar, behave similarly, and do not interchange. Parker carries deeper per-SKU stock — 52,546 stainless ferrules in our warehouse. […]

Baton Rouge industrial fittings and valves distributor: Collins-Oliver, your authorized DK-LOK source in Louisiana, carries DK-LOK, Swagelok-compatible, Parker, and Hoke lines. Call (225) 922-9324 for a quote.

AN/JIC 37-degree flare fittings reference: SAE J514 standards, dash-size and thread chart, materials, and applications. Call Collins-Oliver, your authorized DK-LOK distributor in Baton Rouge, for a quote.

Tubing selection for instrumentation: seamless vs welded, wall thickness, hardness, and material grade. Learn the specs that make tube fittings seal. Call Collins-Oliver, your authorized DK-LOK distributor in Baton Rouge, for a quote.

TL;DR Ball valves give you fast, positive shutoff with a quarter-turn handle and almost no pressure drop when fully open. Three configurations dominate industrial service: one-piece (compact, light-duty), two-piece (most […]

TL;DR Check valves stop reverse flow. They open under forward pressure and close instantly when flow reverses. Five common designs: poppet, ball, swing, disc, and diaphragm. Pick by service, cracking […]

TL;DR Needle valves give fine flow control by driving a tapered stem into a matching seat. Parker, Swagelok, and Hoke each dominate a different slice of the market — Parker […]

TL;DR Quick-connect tube fittings let you make and break a line in seconds without tools. Two main families dominate industrial work: dry-disconnect couplings (zero spillage) and shut-off couplings (auto-seal both […]

TL;DR 304 stainless covers general-service tubing. 316 and 316L step up corrosion resistance for chemical and marine environments. 316L has lower carbon than 316 — the L grade is mandatory […]

TL;DR Oil and gas service runs tube fittings hard: hydrogen sulfide exposure, high-pressure hydraulic control lines, instrument process taps, and offshore corrosion-resistant runs. NACE MR0175 / ISO 15156 governs sour-service […]

TL;DR Power generation runs tube fittings on instrument lines around boilers, turbines, condensers, and steam piping — pressure to 4,500 psi, temperature to 1,200°F. 316L stainless covers most water and […]