Size: Can machine any size of flange, up to 5 metres Ø (we can develop as per requirement)
Flange Facing Services helps to keep your plant running efficiently, safely and more environmentally friendly. In-Situ Flange Facers save time and money by doing repairs on-site and In-place. In Situ Machining is equipped with a full line of flange facers that can handle for various diameters, viz., facing from dia 25 - 1600 mm with single point tools and milling from dia 1500 to 1600 mm with multi-point milling cutters and larger upon request.
Flatness tolerances within 0.02mm for the smaller sizes and within 0.2mm for larger diameters Facing heads are available to machine hard to reach areas in conjunction with boring machines Grind- ing attachments fitted where Ra1.6μm or better if required
Comprehensive range of lange facing equipment finishing heads for Ra0.8μm.
Inside, outside diameter, surface or bore location and can be set to a required datum (eg ship's datum, adjacent component).
Related flanges can be machined concentric, parallel or to any required orientation in conjunction with portable measurement equipment.
The ASME B16.5 code requires that the flange face has a specific roughness to ensure it is compatible with the gasket and therefore provide a high quality seal.
Machine Usage Application
The process of flange facing involves the machining of flange mating surfaces on pipe and vessel connectors to produce a tight, leak-proof seal when assembled.
Types Of Flange Damage
This type damage is narrow and elongated with sharp, shallow bottoms. However, depending on the force that created them, they can be deep.
Frequently, this type damage is created by a sharp object dragging across the flange face. These objects may include the bristles of a wire brush or a tool, such as a chisel.
These are wide and elongated with blunt, rounded bottoms and are created by a dull object dragging across the flange face. Gouges can be caused by objects—such as a screwdriver, flange jack or chisel.
This damage is usually small, somewhat rounded areas of concentrated material loss created by corrosion. Often, pits occur in clusters or groups
This type damage can be sharp or blunt on elongated areas caused by some form of impact. Dents sometimes result from equipment collisions caused by positioning the mating flanges WHEN using cables and rigging.
Metal gaskets and those with less conformable metallic contact surfaces require a very smooth surface finish. Solid metal and corrugated designs offer very litle forgiveness to flange finish or bolting and assembly deficiencies. A typical flange surface finish recommendation for these types of metal-contact gaskets is 64-µin Arithmetic Average Roughness Height (AARH)/Root Mean Square (RMS) or smoother.
So, gaskets, such as compressed fiber sheet and rubber can be more forgiving to misalignment and out-of-parallelism of the flange. A rougher surface finish is generally recommended for soft, non-metal reinforced materials to create the necessary friction for stability and tightness between the mating surfaces. A typical surface finish recommendation for these materials is 125- to 250-μin or rougher.
Made by combining soft nonmetallic materials as fillers, facings or insertions with a metallic core or cover. Designs include spiral wound, corrugated and jacketed. The combination of the tougher, more creep resistant metal with a more conformable facing or filler,such as PTFE and flexible graphite provides great advantages, particularly in more severe applications. For those with facing and spiral wound gaskets, a wider range of surface finishes can be tolerated such as 125- to 250-μin. For metal jacketed gaskets with soft filler, 64- to 125-μin is generally preferred.