An industrial heat exchanger specification typically defines the design, performance, materials, operating conditions, and applicable standards for the equipment. Below is a general specification template that can be adapted for most industries.

Industrial Heat Exchanger Specification

1. General Information

Equipment: Heat Exchanger
Type: Shell & Tube / Plate / Air-Cooled / Double Pipe
Service: Process Fluid Cooling/Heating
Quantity: 1
Tag Number: HX-101

2. Design Conditions

Parameter	Shell Side	Tube Side
Fluid	Hot Process Fluid	Cooling Water
Flow Rate	20,000 kg/h	25,000 kg/h
Inlet Temperature	150C	30C
Outlet Temperature	90C	45C
Design Pressure	16 bar	10 bar
Design Temperature	200C	100C
Operating Pressure	12 bar	6 bar

3. Thermal Design

Heat Duty: 1.2 MW
Overall Heat Transfer Coefficient: As per thermal design
Log Mean Temperature Difference (LMTD): Calculated
Fouling Factor:
- Shell side: 0.0002 mK/W
- Tube side: 0.0001 mK/W

4. Mechanical Design

Exchanger Type: Shell & Tube
TEMA Type: AES (or as required)
Shell Diameter: As per design
Tube Length: 36 m
Tube Outside Diameter: 19.05 mm (3/4 in)
Tube Thickness: 1.65 mm
Number of Tubes: As required
Tube Pitch: Triangular/Square
Number of Tube Passes: 2
Shell Passes: 1
Baffle Type: Single Segmental
Baffle Spacing: 2050% of shell diameter

5. Materials of Construction

Component	Material
Shell	Carbon Steel ASTM A516 Gr.70
Tubes	Stainless Steel 316L
Tube Sheet	Carbon Steel with SS Cladding
Channel	Carbon Steel
Gaskets	Spiral Wound SS/Graphite
Bolting	ASTM A193 B7 / A194 2H

6. Connections

Shell Inlet/Outlet: Flanged, ANSI Class 150/300
Tube Inlet/Outlet: Flanged
Vent Connection
Drain Connection
Thermowell Connection
Pressure Gauge Connection

7. Codes and Standards

ASME Section VIII Div. 1
TEMA Standards
API 660 (for shell-and-tube exchangers in refinery service)
ASME B16.5 (Flanges)
ASTM Material Standards

8. Inspection and Testing

Hydrostatic Test
Pneumatic Leak Test (if required)
Non-Destructive Testing (RT, UT, PT, MT as applicable)
Material Test Certificates
Positive Material Identification (PMI), if specified

9. Surface Protection

Internal Coating: As required
External Painting: Epoxy primer and polyurethane topcoat
Insulation: Mineral wool or calcium silicate (if required)

10. Documentation

General Arrangement Drawing
Mechanical Data Sheet
Thermal Design Calculation
Fabrication Drawings
Welding Procedure Specifications (WPS/PQR)
Inspection and Test Plan (ITP)
Material Certificates
Operation & Maintenance Manual

11. Performance Guarantee

Heat duty as specified
Maximum allowable pressure drop
Leak-free operation
Design life: Typically 20 years (subject to service conditions)

This template can be tailored for specific applications such as power plants, oil and gas, chemical processing, HVAC, food processing, or pharmaceutical industries by adjusting the design conditions, materials, standards, and performance requirements.