Oil and gas machined parts

Most of the work is turned and milled components, plus the sheet metal on skids and instruments. This is how the parts route, with the metal series that usually suit them:

The pressure rating, test and design code of the equipment stay with you. We make the parts to your drawing.

We machine stainless steel, mild steel, brass, copper, titanium, aluminum and tool steel, by alloy series. Stainless steel is the usual choice for wetted and outdoor parts. Our CNC machining materials page explains how the stainless series differ.

Duplex and super duplex stainless, nickel alloys and low-alloy steels such as the 41xx series aren’t on our list. Many sour service and high-pressure parts call for exactly those, so if your drawing names one, tell us first and we’ll say before quoting whether we can help.

Only when the material suits it. NACE MR0175 / ISO 15156 sets the requirements for metals used in oil and gas production equipment exposed to hydrogen sulfide (H2S). It’s published jointly by the International Organization for Standardization (ISO) and the Association for Materials Protection and Performance (AMPP).

The standard places the material choice with the equipment designer, and it often points to alloys outside our list. State sour service and the exact grade on the drawing. We confirm the material route before quoting, or tell you plainly that the part is outside what we machine.

Yes, to your drawing. ASME B16.5 from the American Society of Mechanical Engineers (ASME) covers standard pipe flanges from NPS 1/2 to NPS 24. It calls for cast or forged material, with plate allowed only for blind and certain reducing flanges. A flange machined from bar or plate isn’t a B16.5 flange, even if the dimensions match.

So we make custom and non-standard flanges and flange adapters to drawing. If your flange must comply with B16.5, tell us with the drawing, and the material route is confirmed before quoting.

A mill certificate comes with every order, along with QC inspection and ISO 9001 documentation. EN 10204, from the European Committee for Standardization (CEN), defines the types of inspection document. If your specification calls for type 3.1, say so: a 3.1 material test certificate is available on request.

These reports are also available on request:

• Material verification: positive material identification (PMI).
• Non-destructive testing: liquid penetrant (LPI) and magnetic particle (MPI) inspection.
• Dimensional: a CMM inspection report or first article inspection report.

We don’t supply API monogrammed equipment, which only API licensees can mark (API).

Most delays on process parts come from a requirement that was in the buyer’s head, not on the drawing. Put these on the drawing or the order:

• The exact grade, not just “stainless”, and the material standard if one applies.
• The service conditions: sour service, chloride or seawater exposure, and the operating temperature range.
• The certificate type, such as EN 10204 type 3.1.
• The reports you need, such as PMI, LPI, MPI or a CMM inspection report.
• The thread or end-connection standard for every port and fitting.
• The finish, such as passivation on stainless or paint on carbon steel.

With those in hand, the quote states what we can supply, and nothing is assumed.