Instrumentation and Piping Material

Instrumentation Equipment Valves, Manifolds, Transmitters, Vortex, Hart

GEP puts together complete instrumentation packages.
These can comprise, for example, a range of high integrity valves and manifolds in most materials, including 316SS Monel 400, carbon steel, brass, Hastelloy. Equipment to suit working pressures up to 20,000 Psi. Male and female ends NPT, BSPT, BSPP, socket weld, and butt weld.
Compression ends are also standard. Distribution manifolds, available in a variety of sizes and materials to suit any requirements.
We supply twin and single ferrule compression fittings in 316 stainless, aluminium, bronze, cupronickel, Monel 400, carbon steel,
brass and Hastelloy.

Due to our close connections with well-known manufacturers .

We can also provide Transmitters, Control Valves and items like:
• Tubes and Fittings
• Instrument Valves
• Instrument Cables
• Junction boxes and glands
• Cable Tray & Conduits

Pipes, Flanges and Fittings Overview

GEP carries or is using a worldwide network to source a wide range of Seamless (CS & LTCS), and Welded Process and Line Pipes from ½ ” to 56 ” along with their respective Flanges and Fittings. This extensive Stock is only coming from leading manufacturers fully certified and approved by all major end users.

Buttweld Fittings

Carbon Steel
• A234 WPB and WPHY42 to 80

Low Temperature Pipes
• A420 WP3 and WP6

Stainless Steel & Special Stainless Steel
• A403 WP 304/304L, WP316/316L, WP310, 317, 321, 347, 410, 904, H grades
• A815 UNS S31803 – Duplex 2205
• A815 UNS S32750 / S32760 – Super Duplex 2507

Alloys Steel
• A234 WP5 / WP9 / WP11 / WP22 / WP91

Special Alloys
Nickel Alloys
• Nickel 200/201 – B366 – UNS N02200/N02201
• Alloy 400 – B366 – UNS N04400 – Monel® 400
• Alloy 600 – B366- UNS N06600 – Inconel® 600
• Alloy 625 – B366 – UNS N06625 – Inconel® 625
• Alloy 800H/800HT – B366 – UNS N08810/N08811 – Incoloy® 800H/HT
• Alloy 825 – B366 – UNS N08825 – Incoloy® 825
• Alloy 276 – B366 – UNS N10276 – Hastelloy® C-276

Forged Fittings

Carbon Steel
• A105
• BS EN 545, ISO 2531, ISO 8329, ISO 9523
Low Temperature Pipes
• A350 LF2 and LF3
Stainless Steel & Special Stainless Steel
• A182 F304/304L, 316/316L, 310, 317, 321, 347, 410, 904, H Grades
Alloys Steel
• A182 F5 / 9 / 11 / 22 / 91

Special Alloys
Nickel Alloys
• Nickel 200/201 – B564- UNS N02200/N02201
• Alloy 400 – B564 – UNS N04400 – Monel® 400
• Alloy 600 – B564- UNS N06600 – Inconel® 600
• Alloy 625 – B564 – UNS N06625 – Inconel® 625
• Alloy 800H/800HT – B564 – UNS N08810/N08811 – Incoloy® 800H/HT
• Alloy 825 – B564 – UNS N08825 – Incoloy® 825
• Alloy 276 – B564 – UNS N10276 – Hastelloy® C-276

Flanges

Carbon Steel
• A105
• BS EN 545, ISO 2531, ISO 8329, ISO 9523
Low Temperature Pipes
• A350 LF2 and LF3
Stainless Steel & Special Stainless Steel
• A182 F304/304L, 316/316L, 310, 317, 321, 347, 410, 904, H Grades
Alloys Steel
• A182 F5 / 9 / 11 / 22 / 91

Special Alloys
Nickel Alloys
• Nickel 200/201 – B564- UNS N02200/N02201
• Alloy 400 – B564 – UNS N04400 – Monel® 400
• Alloy 600 – B564- UNS N06600 – Inconel® 600
• Alloy 625 – B564 – UNS N06625 – Inconel® 625
• Alloy 800H/800HT – B564 – UNS N08810/N08811 – Incoloy® 800H/HT
• Alloy 825 – B564 – UNS N08825 – Incoloy® 825
• Alloy 276 – B564 – UNS N10276 – Hastelloy® C-276

Seamless Pipes

GEP delivers a wide range of pipes from stock as production. Our stock consists of both seamless and welded pipes in diameters ranging from 1″ to 56″. All our products primarily come from European or Japanese
GEP supplies seamless and welded pipes in the following material grades (ASTM and ASME):
Carbon Steel
• A53 Gr B / A106 Gr B / API 5L Gr B to Gr X 70
Low Temperature Pipes
• A333 Gr 3 and Gr 6
Stainless Steel & Special Staines Steel
• A312 / SA 312 TP 304/304L, 316/316L, 310, 317, 321, 347, 410, 904, H Grades
• A790 UNS S31803 / S32205 – Duplex 2205
• A790 UNS S32750 / S32760 – Super Duplex 2507
Alloys Steel
• A335 Gr. P5 / P9 / P11 / P 22 / P91 & P92
Special Alloys
Nickel Alloys
• Nickel 200/201 – B161 – UNS N02200/N02201
• Alloy 400 – B165 – UNS N04400 – Monel® 400
• Alloy 600 – B167- UNS N06600 – Inconel® 600
• Alloy 625 – B705 – UNS N06625 – Inconel® 625
• Alloy 800H/800HT – B407 – UNS N08810/N08811 – Incoloy® 800H/HT
• Alloy 825 – B423 – UNS N08825 – Incoloy® 825
• Alloy 276 – B622 – UNS N10276 – Hastelloy® C-276

Welded Pipes

Carbon Steel
• API 5L Gr B to Gr X80
Low Temperature Pipes
• A671 EFW LSAW for atmospheric & Low Temp.
• A672 EFW LSAW for High Pressure service at moderate temperature, in all Grades.
Stainless Steel & Special Staines Steel
• A358 TP 304/304L, 316/316L, 310, 317, 321, 347, 410, 904, H Grades
• A928 UNS S31803 – Duplex 2205
• A928 UNS S32750 / S32760 – Super Duplex 2507
Alloys Steel
• A691 all Grades
Special Alloys
Nickel Alloys
• Nickel 200/201 – B725 – UNS N02200/N02201
• Alloy 400 – B725 – UNS N04400 – Monel® 400
• Alloy 600 – B517- UNS N06600 – Inconel® 600
• Alloy 625 – B705 – UNS N06625 – Inconel® 625
• Alloy 800H/800HT – B514 – UNS N08810/N08811 – Incoloy® 800H/HT
• Alloy 825 – B705 – UNS N08825 – Incoloy® 825
• Alloy 276 – B619 – UNS N10276 – Hastelloy® C-276

Gaskets

Spiralwound
Ring type joint
Metal jacketed
Graphite
Camprofile
PTFE steel lined
Jointing material

Gaskets Overview
• Gasket – Expanded graphite sheets and gaskets
• Gasket – METAL JACKETED GASKETS
• Gaskets – RTJ AND IX SEAL RING GASKETS
• Gaskets – SPIRAL WOUND GASKETS (SWG)

Oil & Gas Valves

Valves Used in the Oil and Gas Industry

GEP communicates on a daily basis with valve manufacturers and distributors here in Europe and other locations around the world. Quoting clients on a wide array of valves – safety relief and industrial from the best known manufacturers.

Globe Valves

A Globe Valve is a type of valve used for regulating flow in a pipeline, consisting of a movable disk-type element and a stationary ring seat in a generally spherical body. Globe valves are named for their spherical body shape with the two halves of the body being separated by an internal baffle. This has an opening that forms a seat onto which a movable plug can be screwed in to close (or shut) the valve. The plug is also called a disc or disk. In globe valves, the plug is connected to a stem which is operated by screw action using a handwheel in manual valves. Typically, automated globe valves use smooth stems rather than threaded and are opened and closed by an actuator assembly.

Check Valves

Check (non-return) valves are installed in pipelines to allow flow in one direction only; helping to protect equipment and processes. The operation, benefits, applications, and selection of different designs, including lift, disc, swing, and wafer check valves. There are various types of check valves used in a wide variety of applications. Check valves work automatically and most are not controlled by a person or any external control; accordingly, most do not have any valve handle or stem. The bodies (external shells) of most check valves are made of plastic or metal.

Lift Check Valves

Lift check valves are similar in configuration to globe valves, except that the disc or plug is automatically operated. The inlet and outlet ports are separated by a cone-shaped plug that rests on a seat typically metal; in some valves, the plug may be held on its seat using a spring. When the flow into the valve is in the forward direction, the pressure of the fluid lifts the cone off its seat, opening the valve. With reverse flow, the cone returns to its seat and is held in place by the reverse flow pressure.

Swing Check Valves

A swing check valve consists of a flap or disc of the same diameter as the pipe bore, which hangs down in the flow path. With flow in the forward’s direction, the pressure of the fluid forces the disc to hinge upwards, allowing flow through the valve. The reverse flow will cause the disc to shut against the seat and stop the fluid going back down the pipe. In the absence of flow, the weight of the flap is responsible for the closure of the valve; however, in some cases, the closure may be assisted by the use of a weighted lever. As can be seen from the image to the right, the whole mechanism is enclosed within a body, which allows the flap to retract out of the flow path.

Swing check valves produce relatively high resistance to flow in the open position, due to the weight of the disc. In addition, they create turbulence, because the flap ‘floats’ on the fluid stream. This means that there is typically a larger pressure drop across a swing check valve than across other types.

With abrupt changes in flow, the disc can slam against the valve seat, which can cause significant wear of the seat, and generate waterhammer along the pipe system. This can be overcome by fitting a damping mechanism to the disc and by using metal seats to limit the amount of seat wear.

Wafer Check Valves

Both lift and swing check valves tend to be bulky which limits their size and makes them costly. To overcome this, wafer check valves have been developed. Wafer check valves are those that are designed to fit between a set of flanges. This broad definition covers a variety of different designs, including disc check valves and wafer versions of swing or split disc check valves.

Disk Check Valves

The disc check valve consists of four main components: the body, a disc, a spring, and a spring retainer. The disc moves in a plane at right angles to the flow of the fluid, resisted by the spring that is held in place by the retainer. The body is designed to act as an integral cantering collar that facilitates installation. Where a ‘zero leakage’ seal is required, a soft seat can be included.

Split Disk Check Valves

The split disc check valve or dual plate check valve is designed to overcome the size and pressure drop limitations of the swing and disc type wafer check valves. The flap of the swing check valve is essentially split and hinged down its centre, such that the two-disc plates will only swing in one direction. The disc plates are held against the seat by a torsion spring mounted on the hinge.