Pipe flanges are manufactured in all the different materials like stainless steel, cast iron, aluminium, brass, bronze, plastic etc. but the most used material is forged carbon steel and have machined surfaces. In addition, flanges, like fittings and pipes, for specific purposes sometimes internally equipped with layers of materials of a completely different quality as the flanges themselves, which are "lined flanges". The material of a flange, is basically set during the choice of the pipe, in most cases, a flange is of the same material as the pipe. All flanges, discussed on this website fall under the ASME en ASTM standards, unless otherwise indicated. ASME B16.5 describes dimensions, dimensional tolerances etc. and ASTM the different material qualities. 

Size: 1/2" NB To 24" NB.

Class: 150#, 300#, 600#, 900#, 1500# & 2500#.

In addition, we also can produce the DIN flange, and the forgings according to the customers drawings, for example, rings and shafts.

Delivery requirment:

Marking: SunnySteel, material grade, standard, specification, heat no.

Surface Treatment: Bright annealed, polished outside and inside surface.

Package: Each pipe in a PVC bag and caps on both ends then bundled in wood case, (option: Bundle with knitted plastic bag/stee crate. )

Inspection: Third party inspection, or by clints

Below are our available industrial pipe flanges that will meet your project needs. We will help you put together your entire project and ship it to your closest port. 

Blind Flanges>>

The blind flange is used to close ends of piping systems. It is a kind of round plate with no center hold but with all the proper bolt holes.

Figure-8 Blanks >>

A figure-8 blank (also called a Spectacle Blind Flange) is a pressure-retaining plate with one solid end and one open end connected with a web or tie bar.

Lap Joint Flanges >>

The lap joint flange is practically identical to a slip-on flange except it has a radius at the intersection of the bore and flange face.

Orifice Flanges >>

Orifice flanges are used instead of the standard pipe flanges when orifice plate or flow nozzle is used.

Reducing Flanges >>

Reducing flanges are used in pipe-to-pipe connections. Reducing flanges are a little easier to bolt up than non-reducing flanges.

RTJ Flanges >>

Ring Type Joint Flange is a method of ensuring leak proof flange connection at high pressures.

Socket Welding Flanges >>

The socket welding flange is similar to a slip-on flange except it has a bore and a counterbore dimension.

Slip-On Flanges >>

The Slip-on flange has a low hub because the pipe slips into the flange prior to welding.

Threaded Flanges >>

Threaded (Screwed) flange is similar to the Slip-On flange, but the bore is threaded.

Welding Neck Flanges >>

The Welding neck flanges is normally referred to as the high hub flange.

Specification: A flange is a method of connecting pipes, valves, pumps and other equipment to form a piping system. 

Keyword: Blind Flanges, Figure-8 Blanks , Lap Joint Flanges, Orifice Flanges, Reducing Flanges, RTJ Flanges, Socket Welding Flanges, Slip-On Flanges, Threaded Flanges, Welding Neck Flanges