Is the SAE 3000 flange connection for welding, carbon steel, type D3 compatible with standard hydraulic hoses and fittings?

Yes . the SAE 3000 flange connection for welding, carbon steel, type D3 Format is compatible with standard hydraulic hoses and fittings designed to SAE 3000 (AS478/SAE J518) systems, with some practical conditions: - Pressure class: SAE 3000 indicates a nominal working pressure around 3000 psi (depends on specific standard variant). Ensure your hose and mating fittings are rated for the same pressure class. - Interface and dimensions: Compatibility requires matching the SAE 3000 flange face and bolt pattern. The D3 Format flange must match the counterpart (hose fitting or adapter) built to the same SAE 3000 dimensional standard. - Welding/socket end: This component is supplied with a welding/socket for attachment to tubing or a flange stub. Ensure the welded connection is made to the correct tube OD/material specified for your hose assembly. - Seal type: It uses an NBR O-ring . confirm the mating fitting uses the same face sealing style and that NBR is acceptable for the hydraulic fluid and temperature range (-20Â°C to +100Â°C). - Materials and environment: Carbon steel is standard; verify corrosion protection (coating/plating) if environment demands. Also confirm fluid compatibility with NBR and carbon steel. - Hardware: Supplied mounting screws simplify assembly, but verify bolt size/grade and torque per SAE guidelines. In short: when matched to hoses and fittings built to the same SAE 3000/D3 specifications, rated for the same pressure, and compatible with NBR and carbon steel, the SAE 3000 flange connection for welding, carbon steel, type D3 Format will be compatible.

What O-ring material options are available for the SAE 3000 flange connection for welding, carbon steel, type D3 to extend temperature range?

For the SAE 3000 flange connection for welding, carbon steel, type D3 Format (supplied with NBR O-ring, -20Â°C to +100Â°C), alternative O-ring materials to extend temperature range include: - FKM (Viton): usable approx. -20Â°C to +200Â°C; excellent oil/chemical resistance and good high-temperature stability. - FFKM (Perfluoroelastomer): approx. -20Â°C to +250Â°C; superior chemical and thermal resistance for demanding fluids/temperatures. - EPDM: approx. -40Â°C to +150Â°C; good low-temperature performance and steam/reservoir compatibility but poor oil resistance. - PTFE (solid or encapsulated O-ring): -200Â°C to +260Â°C; excellent chemical and temperature range, low elasticity-often used as backup or encapsulated for sealing. - HNBR: approx. -40Â°C to +150Â°C; improved temperature and mechanical resistance over NBR, better for hot hydraulic fluids. Select material based on max/min temperature, hydraulic fluid compatibility, pressure and required elasticity.

Can the SAE 3000 flange connection for welding, carbon steel, type D3 be used in applications with aggressive hydraulic fluids?

Likely not recommended without verification. Reasoning: - The SAE 3000 flange connection for welding, carbon steel, type D3 Format is supplied with an Oâring seal made of NBR (nitrile). NBR has good resistance to many mineral hydraulic oils and general-purpose hydraulic fluids within the listed temperature range (â20Â°C to +100Â°C). For conventional petroleumâbased hydraulic fluids at normal operating temperatures this combination is commonly acceptable. - However, "aggressive hydraulic fluids" can mean fluids that are synthetic (phosphate esters, HFA/HFB/HFC, glycolâbased), waterâglycol, fireâresistant fluids, flameâretardant esters, or fluids containing strong additives/solvents. Many of these fluids attack NBR or accelerate corrosion of carbon steel. Carbon steel itself is susceptible to corrosion when exposed to waterâcontaining or chemically aggressive fluids unless protected (coatings, stainless material, or corrosion inhibitors). - The flange and welded joint may be mechanically suitable for SAE 3000 pressure levels, but chemical compatibility of both the Oâring material and carbon steel with the specific aggressive fluid is the decisive factor. Recommendation: - Identify the exact hydraulic fluid (manufacturer, base fluid, additives, water content). Check chemical compatibility charts for NBR and carbon steel with that fluid. If fluid is synthetic or aggressive, consider alternative elastomer (e.g., FKM/Viton, EPDM, HNBR) and/or material upgrade to stainless steel or appropriate coating. - Perform manufacturer or supplier confirmation and testing (compatibility, swelling, hardness change of Oâring, corrosion tests) before deploying in service. Conclusion: The SAE 3000 flange connection for welding, carbon steel, type D3 Format may work with nonâaggressive mineral oils within â20Â°C to +100Â°C, but for aggressive hydraulic fluids you must verify chemical compatibility of NBR and carbon steel or choose alternative materials/seals.

SAE 3000 flange connection for welding, carbon steel, type D3

All products, High-pressure adapters/

Additional information

Material	CS – steel (cast iron)

SAE 3000 flange connection with a compact design and socket for welding, intended for use in hydraulic systems. Supplied with mounting screws and an O-ring seal (NBR). Material: carbon steel. Operating temperature: from -20°C to +100°C.

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
HK-D3-SA-06-17	SAE 3000 collar fitting 3/8", for welding 17.5 mm	-	348	In stock	Enquiry
HK-D3-SA-08-21	SAE 3000 collar fitting 1/2", for welding 21.6 mm	-	348	In stock	Enquiry
HK-D3-SA-12-27	SAE 3000 collar fitting 3/4", for welding 27.2 mm	-	348	In stock	Enquiry
HK-D3-SA-16-34	SAE 3000 1" collar fitting, for welding 34.1 mm	-	348	In stock	Enquiry
HK-D3-SA-20-42	SAE 3000 flange fitting 1.1/4", for welding 42.8 mm	-	278	In stock	Enquiry
HK-D3-SA-24-48	SAE 3000 flange fitting 1.1/2", for welding 48.6 mm	-	210	In stock	Enquiry
HK-D3-SA-32-61	SAE 3000 collar fitting 2", for welding 61 mm	-	210	In stock	Enquiry
HK-D3-SA-40-76	SAE 3000 flange fitting 2.1/2", for welding 76.6 mm	-	175	In stock	Enquiry
HK-D3-SA-48-90	SAE 3000 collar fitting 3", for welding 90.5 mm	-	138	In stock	Enquiry
HK-D3-SA-56-103	SAE 3000 flange fitting 3.1/2", for welding 103 mm	-	35	In stock	Enquiry
HK-D3-SA-64-115	SAE 3000 flange fitting 4", for welding 115.3 mm	-	35	In stock	Enquiry
HK-D3-SA-80-142	SAE 3000 collar fitting 5", for welding 142 mm	-	35	In stock	Enquiry

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SAE 3000 flange connection with a compact design and socket for welding, intended for use in hydraulic systems. Supplied with mounting screws and an O-ring seal (NBR). Material: carbon steel. Operating temperature: from -20°C to +100°C.