HGW Blog

Stainless steel fittings are selected when the fluid, external environment, cleaning process, or documentation makes corrosion control important. They are not simply a stronger-looking version of carbon steel, and they are not immune to chlorides, acids, crevices, contamination, or incorrect assembly. Material selection should start with the corrosion mechanism and operating conditions, then verif

PTFE thread-seal tape can help seal and lubricate a brass tapered pipe connection. It is not a universal treatment for every brass thread. The first decision is whether pressure is sealed along the threads or at a separate ferrule, flare, washer, gasket, cone, or O-ring. Identify the connection before opening the tape roll NPT and other specified tapered pipe threads develop interference as they t

Russia’s 2022 invasion of Ukraine was a severe nickel-market shock, but a 2026 stainless procurement plan should not reuse the production shares or spot prices reported during that week. Supply has changed, especially through Indonesia, while sanctions, trade policy, product form, energy, freight, and alloy demand continue to influence availability. Keep the 2022 event as history, not a live price

Carbon steel, stainless steel and brass each cover broad alloy and product families. Material selection should begin with the pressure boundary and exposure zones, then use the rating and connection data for the exact fitting. Generic pressure ceilings or application lists create false confidence because geometry and size can change capability more than the material name. Use carbon steel where st

Hydraulic contamination control begins before oil enters the reservoir and continues through component manufacturing, storage, assembly, field repair, and restart. Filters are important, but they cannot compensate for open ports, dirty transfer containers, damaged seals, or a repair that releases chips directly downstream of the filter. Define the cleanliness target by component sensitivity Servo

Brass and stainless steel can both be appropriate fitting materials. Their usefulness cannot be reduced to brass for low cost and stainless for high pressure. Alloy composition, fitting geometry, size, seal, joining process, media, temperature, external exposure, and product qualification decide the finished component’s performance. Specify the alloy rather than the color Brass is a family of copp

Brass and stainless steel can be connected in some fluid systems, but the joint cannot be approved from a short anodic-index distance alone. Galvanic corrosion requires electrical contact, an electrolyte and a potential difference, while geometry and environment determine the rate. The exact brass and stainless grades matter as much as their family names. Map the galvanic cell Identify which metal

A hydraulic fitting stops leaking only when its intended sealing surfaces meet in the required condition. Extra torque cannot create a missing O-ring, change a 45-degree seat into a 37-degree flare, or restore cracked port threads. It can convert a repairable seep into a separated hose or damaged manifold. Identify the seal before selecting a remedy NPT and other tapered pipe threads use controlle

Fluid collecting on a fitting does not prove the fitting is the source. Oil can travel along a hose, tube, adapter, or machine surface before dripping at the lowest point. Replacing the visible part without tracing the leak can add downtime while leaving the original failure untouched. Diagnosis begins with safety and energy isolation. High-pressure fluid can penetrate skin, and a stopped machine

Replacing an O-ring is a precision maintenance task. The inexpensive seal sits against a groove, face, chamfer, bore, or backup component that may cost much more. Scratching that hard surface or installing a nearby size can turn a routine repair into a recurring leak. Confirm the connection before removing the seal ORFS, ORB, and hydraulic quick couplings all use elastomers, but the seal locations