Stainless Steel Hydraulic Fittings

Where carbon steel will not last

The same connection standards, in 316L

Size range

Every size above is a part number you can quote from. Open any listing for its full table.

Delivery

Stainless Steel Hydraulic Fittings across the Gulf

Questions we get asked

About this range

01Is 316L stainless rated as high as carbon steel?

Not always. A stainless fitting can carry a lower working pressure than a carbon-steel part of the same size and form, so check the rating on the listing against the line rather than assuming the carbon-steel figure.

02Can stainless fittings be used with carbon-steel adapters?

They will connect, but in a wet or salty environment the joint becomes a galvanic cell and the less noble part corrodes faster. Match materials where the exposure is severe.

03Do you supply material certificates?

Ask for EN 10204 material certificates at quotation if your order needs them, and we will confirm what is available for each item.

04Why 316L rather than 304 stainless?

316L contains molybdenum, which gives it much better resistance to pitting in chlorides — seawater, salt air and many cleaning chemicals — than 304. The L means low carbon, which limits carbide formation when the part is welded, so welded standpipes and weld fittings keep their corrosion resistance at the joint. For Gulf coastal and offshore service, 316L is the usual minimum grade.

05Will 316L fittings rust on a coastal site?

They can show surface staining in hot, salty air, but they do not corrode through the way plated carbon steel does. Brown tea-staining on 316L in the Gulf is common where salt deposits sit on the surface and are never washed off, and crevices under clamps and tags are where it starts. Rinsing with fresh water during routine maintenance largely prevents it; heavy pitting points to a harsher environment and a higher grade.

06How can I tell a stainless fitting from plated steel?

A magnet is the quickest check: plated carbon steel is strongly magnetic, while 316L is essentially non-magnetic. Cold-worked or machined areas of stainless can pull slightly, so a weak attraction is not proof of steel. Plated steel also shows yellow or silver zinc plating that wears through to grey at edges and threads. For a documented check, ask for the material certificate when you order.