Forged Tube Sheets And Flanges for heat exchangers and pressure equipment

Jan 08, 2026

Leave a message

GNEE STEEL,a manufacturer specialized in forged tube sheets and flanges for heat exchangers and pressure equipment.

Forged tube sheets and flanges are critical, high-strength metal components for heat exchangers, providing structural support for tube bundles and separating fluids under high pressure and temperature, with forgings offering superior durability over cast parts. They are custom-machined with precise tube holes and often feature integrated flanges, allowing for secure connections in demanding applications across energy, chemical, and industrial sectors, ensuring efficiency and leak prevention.They are widely used in industrial equipment such as heat exchangers, boilers, and pressure vessels, playing a critical role in connecting pipes and ensuring the smooth transfer of media.

We regularly supply custom tube sheets according to drawings or standards, including:

Carbon steel, alloy steel and stainless steel

A105, A350 LF2, A182 F11 / F22 / F316, etc.

Drilling as per TEMA / ASME requirements

Full traceability with MTC, NDT and dimensional inspection

With in-house forging, machining and inspection, we help customers control quality and delivery time for project-based orders.

May I ask if you are currently involved in any heat exchanger or pressure equipment projects where tube sheets are required?
If you have drawings or specifications, I would be glad to review and give technical feedback.

How We work

Designing and manufacturing our tubesheets

Tubesheets are vital support components in shell-and-tube heat exchangers, essential for efficient thermal energy transfer in a wide range of industrial processes. Their highly automated design and production ensure precision and reliability.

We use CAD software to create detailed designs and perform calculations, optimizing the layout and dimensions. Our CAM technology then translates these designs into precise instructions for CNC machines, which handle the drilling and fabrication of the tubesheets with high accuracy

Key Features:

Tube Support: Holds the tubes securely in place.

Sealing: Prevents fluid leakage between the tubes and the shell.

Flow Direction: Directs the flow of fluids through the tubes.

Applications:

Heat Exchangers: Used in shell-and-tube heat exchangers to support the tubes.

Boilers and Reactors: Fixes tubes for heat exchange or chemical reactions.

Pressure Vessels: Ensures fluid separation within the vessel.

What They Are?

Tube Sheet: A thick, perforated metal plate that holds tubes in a fixed position, separating the shell-side fluid from the tube-side fluid.

Flange: A ring-shaped component designed to connect the heat exchanger to piping or other equipment, often forged as part of the tube sheet.

What is a tube sheet in a heat exchanger?

A tube sheet in a heat exchanger is a plate with holes drilled in at optimal positions. Tubes then pass through these holes. The tube sheet holds the tubes in place within the heat exchanger to ensure effective heat transfer.

In shell and tube heat exchangers, two plates support the tubes, one on each end. Fluid passes through the tubes while a second fluid (coolant) flows within the shell surrounding the tubes.

Material Selection:

The materials for both tubesheets and flanges must withstand high temperatures, pressure, and, in some cases, corrosive environments. Common materials include:

Carbon Steel: Used for standard applications with lower cost and good strength.

Stainless Steel: Ideal for applications requiring corrosion resistance, especially in chemical processing.

Alloy Steel: Used for systems requiring higher strength and better resistance to wear and heat.

Nickel Alloys: Preferred for extremely high temperatures and aggressive chemical environments.

Alloy steel

Nickel alloys

Duplex stainless steel

Carbon steel

Stainless steel

Titanium

Copper alloys per ASTM B171 / ASME SB171 / DIN EN 1653

C46400 Naval brass

C61400 Aluminium bronze

C63000 AlNi bronze

C70600 90-10 CuNi

C71500 70-30 CuNi

Ferritic and martensitic steels
11CrMo9-10	W.Nr. 1.7383	EN 10222-2
13CrMo4-5	W.Nr. 1.7335
16Mo3	W.Nr. 1.5415
X16CrMn5-1	W.Nr. 1.7366
X10CrMoVNb9-1	W.Nr. 1.4903
X20CrMoV11-1	W.Nr. 1.4922
P245GH	W.Nr. 1.0352
P250GH	W.Nr. 1.0460
P280GH	W.Nr. 1.0426
P305GH	W.Nr. 1.0436

Stainless steels
X2CrNi18-9	W.Nr. 1.4307	EN 10222-5
X2CrNiMo17-12-2	W.Nr. 1.4406
X2CrNiMo17-13-2	W.Nr. 1.4404
X2CrNiMoN22-5-3	W.Nr. 1.4462
X2CrNiMo17-13-3	W.Nr. 1.4429
X2CrNiMo25-7-4	W.Nr. 1.4410
X3CrNiMo13-4	W.Nr. 1.4313
X3CrNiMoN17-13-3	W.Nr. 1.4436
X5CrNi18-10	W.Nr. 1.4301
X5CrNiMo17-12-2	W.Nr. 1.4401
X6CrNi18-11	W.Nr. 1.4948
X6CrNiMoTi17-12-2	W.Nr. 1.4571
X6CrNiNb18-10	W.Nr. 1.4550
X6CrNiTi18-10	W.Nr. 1.4541
X2CrNiMo18-14-3	W.Nr. 1.4435
X2CrNiMo17-12-3	W.Nr. 1.4432

Alloy special steels
20MnMoNi4-5	EN 10250-3

Stainless steels
X12Cr13	EN 10250-4
X3CrNiMo13-4	EN 10250-4

Forged or rolled alloy and stainless steel pipe flanges
Most typical:	ASTM A182/A182M
A182 F1
A182 F2
A182 F5
A182 F6a Cl. 1
A182 F6a Cl. 2
A182 F6a Cl. 3
A182 F6NM
A182 F11 Cl. 1
A182 F11 Cl. 2
A182 F11 Cl. 3
A182 F12 Cl. 1
A182 F12 Cl. 2
A182 F21
A182 F22 Cl.1
A182 F22 Cl.2
A182 F22V
A182 F51
A182 F53
A182 F55
A182 F92
A182 F304
A182 F404L
A182 F304H
A182 F310
A182 F310H
A182 F310MoLN
A182 F316
A182 F316L
A182 F316LN
A182 F316Ti
A182 F316 Urea Grade
A182 F317
A182 F317LN
A182 F321
A182 F321H
A182 F347
A182 F347H

Hot rolled & cold finished steel age hardening stainless bars and shaping
UNS N04400/N08811	ASTM B564/B564M
UNS N08800/N08810
UNS N08825/N010276
UNS N06625

Nickel steels
12Ni14	W.Nr. 1.5637	EN 10222-3
X12Ni5	W.Nr. 1.5680	EN 10222-3

Weldable fine grain steels
P285NH	W.Nr. 1.0477	EN 10222-4
P355NH	W.Nr. 1.0565
P420NH	W.Nr. 1.8932
P285QH	W.Nr. 1.0478
P355QH1	W.Nr. 1.0571
P420QH	W.Nr. 1.8936

Carbon steel forging
C22		EN 10250-2
20Mn5
20Mn5N
20Mn5V
S235JRG2	W.Nr. 1.0038
S235J2G3	W.Nr. 1.0116
S355J2G3	W.Nr. 1.0570

Weldable fine grained structural steels
W/T/STE285	DIN 17103
W/T/STE355
W/T/STE420
W/T/STE460
W/T/STE500

Customer requirements
12CrMo19-5	Customer requirements
12CrMo9-10
15NiCuMoNb4-5-6

Carbon steel for piping components
A105/A105M	ASTM A105

Carbon and low alloy steel forgings
A350LF2	ASTM A350/A350M
A350LF3
A350LF6

Carbon steel forgings for pressure vessel components
A266 Gr. 2	ASTM A266/A266M
A266 Gr. 4	ASTM A266/A266M

Alloy steel forgings for pressure and high temperature parts
Most typical:	ASTM A336/A336M
A336 F1
A336 F5
A336 F5A
A336 F11
A336 F22
A336 F22V
A336 F9
A336 F91
A336 F92

Quenched and tempered vacuum-treated carbon and alloy steels
A508 Gr. 1	ASTM A508/A508M
A508 Gr. 2
A508 Gr. 3
A508 Gr. 4N

Carbon and alloy steel forgings for pipe, flanges, fittings valves and parts
A694 F52	ASTM A694/A694M
A694 F60
A694 F65
A694 F70

Carbon and low-alloy steel forgings with mandatory toughness requirements
A765 Gr. I	ASTM A765/A765M
A765 Gr. II
A765 Gr. III
A765 Gr. IV

Alloy steel forgings
UNS N08904	ASTM B625/B625M

Nikel-copper alloy
UNS N04400	ASTM B564/B564M

Tube Sheets

Tube sheets are thick metal plates with precisely drilled holes to secure the tubes. They are crucial for maintaining the structural integrity of the heat exchanger and preventing fluid mixing. We provide robust tube sheets designed to withstand high pressures and temperatures.

Alloys available:
C276, 825, 625, 400, 304L, 316L, 321, 347, F53, F51/F60 duplex, F9 chrome

Forged Tube Sheets

Forged tube sheets are manufactured using compressive forces, resulting in superior strength and durability compared to those made through casting or machining. Our forged tube sheets are ideal for high-stress applications.