HGW Blog

A push-to-connect fitting does not work with every tube that fits through its release collar. The tube outside diameter, material, hardness, surface, wall, preparation, and support interact with the collet or teeth and O-ring. The body material is only one part of that system. Selection should begin with the media and tube, then verify fitting construction and approvals for the exact application.

“Superalloy” and “specialty alloy” cover materials designed for different combinations of corrosion, oxidation, strength and temperature. A high purchase price or nickel content does not make one family the best choice for every harsh environment. Selection starts with the failure mechanism, then identifies an exact grade, product form and fabricated condition. Start with the environment rather th

Adding a connection to a hydraulic system can solve a port mismatch, route a hose, reduce size, attach a tube, or create a permanent pipe branch. It can also create a chain of adapters with extra leak paths, restrictions, unsupported weight, and confusing standards. The design should reach the required interface with the fewest verified transitions while preserving service access and pressure inte

Hydraulic systems need removable boundaries at pumps, valves, cylinders, filters and conductors so components can be installed and serviced. Each boundary also introduces sealing surfaces and mechanical loads. Good design places a fitting or flange where it can be assembled, supported, inspected and opened safely. Begin with the maintenance sequence Map which component must be removed and which li

Forging and brazing are different ways to create a fitting body. Forging reshapes a solid workpiece, while brazing joins prepared components with a filler metal. Neither process name alone establishes pressure rating, fatigue life, leak performance, or cost. The right choice depends on geometry, alloy, joint loads, production volume, process control, and verification of the finished component. For

An air-brake connector should not be selected from the words “D.O.T. fitting” in a catalog alone. The plastic tubing, end fitting, assembly, port, markings, routing, and vehicle application must form a compliant, documented combination. FMVSS No. 106 in 49 CFR 571.106 contains performance and labeling requirements for brake hose, plastic air-brake tubing, assemblies, and end fittings. Product and

Rolled threads, cut threads, one ferrule, and two ferrules describe manufacturing or architecture. None of those labels proves by itself that an instrumentation connection is suitable for pressure, temperature, vibration, corrosion, or a critical process. The fitting must be evaluated as a qualified system: body, nut, ferrule set, tube, material condition, machining, seal geometry, assembly method

Pipe flanges create removable or equipment interfaces in piping systems, but the name of the flange does not establish its rating or suitability. The pressure class, material group, temperature, facing, gasket, bolts, pipe schedule, welding procedure, corrosion allowance, and governing code work together. Selection begins with the purpose of the joint: terminate a line, connect equipment, allow fr

Small-bore process valves may share similar port sizes while performing very different duties. Classifying them by what the circuit must do—shut off, meter, route, prevent reverse flow, limit pressure or support an instrument—produces a clearer specification than one product list. Provide rapid isolation or switching Ball valves rotate a bored closure, commonly through a quarter turn, for open or

A hydraulic hose end performs two separate jobs. The stem and ferrule or socket retain and seal the hose; the terminal end connects the assembly to a port, tube, manifold or another hose. Both interfaces must be specified. Qualify the hose attachment first Machine-crimped ends use controlled deformation from dedicated dies and settings. Hose series, fitting stem, ferrule, tooling and target crimp