Hazloc Heaters SRH2 Steam Rig Heater | Industrial Heaters

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Hazloc Heaters SRH2 Industrial Steam Rig

Hazloc Heaters SRH2 | Industrial Steam Rig Heaters

Steam Rig Heaters

Hazloc SRH2 steam rig heat-exchanger unit heater is an industrial grade heater specifically designed for steam applications on oil and gas drilling rigs where boiler neglect can lead to freeze-up conditions.

The harsh operating conditions of these industries require equipment to be safe, reliable and dependable.

The Hazloc SRH2 series of heaters can prevent boiler failure or system neglect, which could result in an accidental freeze-up of a heating system.

SRH2 industrial heaters are simple to use and are designed to meet ASME requirements for steam applications with a maximum operating pressure up to 150 PSIG (1034 kPa).

Steam unit heaters condense steam rapidly, especially during warm-up periods. The return piping must be planned to keep the heat exchanger’s core free of condensate during periods of maximum heat output, and steam piping must be able to carry a full supply of steam to the unit heater to take the place of condensed steam. Adequate pipe size is especially important when a unit heater fan is operated under on-off control because the condensate rate fluctuates rapidly.

Hazloc Heaters SRH2

Product Benefits

There are 6 sizes of Hazloc SRH2 heater available, all featuring the Hazloc SafeDeform top and bottom core headers.

The SafeDeform headers are designed to deform the increased volume due to ice expansion, during freeze-up conditions – this enables the Hazloc SRH2 heaters to be frozen several times without suffering any critical damage.

The range features single or three phase heaters with general purpose or explosion proof motors.

Voltages range from 115V to 575V and fan sizes from 12″ to 36″.

Standard Marathon NEMA explosion proof motors are suitable for Class I & II, Div. 1 & 2, Groups C, D, F & G; T3B; Maximum ambient air temperature of 40°C.

Key Features of Hazloc Heaters SRH2

Hazloc SRH2 steam rig range of heaters is dedicated to providing the safest, industrial steam rig heating in the most challenging areas and applications.

Key product features provide unbeatable performance, reliability and safe heat when it is needed.

These features include:

Extra Strength – metal rivets in the top panel provide extra strength

Durability – 14 gauge steel cabinet construction is covered in a epoxy coating for added durability

Safe Or Hazardous Areas – angle of general purpose or explosion proof motors are available

Air Flow Control – aluminium louvres attached to dimpled cabinet panels for easy control of air flow direction

Long Life – 16-gauge (0.065 in.) tension-wound aluminium fin tubes for longer life

SRH2 heaters are also available with EAC Ex certification – contact Thorne & Derrick for details.

Hazloc SRH2 Steam Rig Heater Product Benefits

Hazloc SRH2 Steam Rig Heater Product Benefits

Hazloc Heaters SRH2 Steam Rig Heater

Technical Specifications

Hazloc SRH2 SafeDeform heat exchanger cores are constructed using rugged 16-gauge (0.065 in) carbon steel tubes with tension-wound aluminium fins and 12-gauge (0.105 in.) carbon-steel headers for maximum durability, resistance to corrosion and longer life in demanding applications.

Heater Location Guidelines

For optimum heating results follow these guidelines:

1. Do not install heaters such that airflow is blocked or impeded by equipment or walls
2. For occupant comfort, position heaters so that air discharge is directed across areas of highest heat loss
3. For large areas, arrange heaters such that the air discharge of one heater is directed towards the inlet of the next heater. This sets up a rotational airflow with air circulation in the central area of the building
4. For equipment freeze protection, direct air discharge at required equipment
5. For large workshops or warehouses it may be acceptable to use fewer but larger heaters
6. Do not direct air discharge towards a room thermostat
7. Heater inlet and outlet coupling connection locations can be reversed in the field by removing the core, rotating it 180 degrees and then re-installing it. Cabinet plugs can then be repositioned

ApprovalCRN: 0H14931.2C – steam or fluids (not for use with lethal fluids as defined by ASME, Section VIII, Div. 1, UW-2).
Maximum pressure rating150 psig (1034 kPa).
Maximum temperature rating550 °F (288°C).
Minimum design metal temperature-20° F (-29° C)
Cabinet material14-gauge (0.075 in.) (1.9 mm) steel. SRH2-36 is 12-guage (0.105 in. (2.7 mm) steel on top and bottom panels and motor mount. Yellow epoxy/polyester powder coated with five-stage pre-treatment, including iron phosphate
Louver bladesAnodised extruded aluminium.
FanSpark-proof three-blade aluminium (except SRH2-30 which is two-blade and SRH2-36 which is six-blade).
Fan guardSplit design with close wire spacing. A 3/8 in. (9.5 mm) diameter probe will not enter.
Motor driveThermally protected CSA or UL Listed 1725 RPM permanently lubricated ball bearing type with 56 frame and “easy-off” fan blade replacement feature.
SRH2-36 is a 56C frame motor and a maintenance-free speed reducer
Mounting holes5/8 in. – 11 UNC – 4 holes at top of heater (2 holes, SRH2-12)
Fluid connections2 in. NPT female inlet and outlet (configuration of fluid connection locations can be reversed by rotating the core).
Header material12 gauge (0.105 in.) (2.7 mm) and 3/16 in. (4.8 mm) carbon steel conforming to ASME requirements.
Finned tubes5/8 in. (15.9 mm) outside diameter [16-gauge, 0.065 in. (1.6 mm) wall thickness] carbon steel tubes with 1-1/2 in. (38.1 mm) outside diameter copper-free, L-foot, tension-wound aluminum fins @ 10 fins per in.

Hazloc Heaters SRH2 Hazardous Area Explosion Proof Electric Heater : front, back and core view

Hazloc Heaters SRH2 Hazardous Area Heater : front, back and core view

 Hazloc SRH2 – Product Range

Hazloc SRH2 Part NumberSRH2-12SRH2-16SRH2-20SRH2-24SRH2-30SRH2-36
Fan diameter in. (mm)12 (304.8)16 (406.4)20 (508.0)24 (609.6)30 (762.0)36 (914.4)
Air delivery* cfm (m3/hr)1090 (1852)1650 (2803)3000 (5097)3800 (6456)5500 (9344)8350 (14,186)
Approx. air velocity* fpm (m/s)1305 (6.6)1111 (5.6)1309 (6.6)1138 (5.8)1066 (5.4)928 (4.7)
Air throw* @ 15 psi steam ft (m)45 (13.7)65 (19.8)70 (21.3)80 (24.4)85 (25.9)70 (21.3)
Motor power hp (watts)1/4 (186)1/4 (186)1/2 (373)1/2 (373)3/4 (559)1 (746)
Rec. min. mounting height ft (m)7.5 (2.3)7.5 (2.3)7.5 (2.3)7.5 (2.3)7.5 (2.3)7.5 (2.3)
Net weight lbs (kg)78 (35.4)98 (44.4)132 (59.9)200 (90.7)257 (116.6)482 (218.6)
Approx. shipping weight lbs (kg)128 (58.1)150 (68.0)190 (86.2)265 (120.2)332 (150.6)594 (269.4)

* At 70°F (21°C), 60 Hz and sea level.

Hazloc Heaters - Hazardous Area Electrical Heating Equipment (ATEX IECEX CSA)

Hazloc Heaters – Heating Equipment


Hazloc Heaters are global suppliers and manufacturers of industrial and explosion-proof heaters and thermostats for hazardous areas and severe duty locations – this includes industrial heating products for non-hazardous and severe-duty applications. Explosion proof and hazardous area certifications include North American (NEC & CE), International (CENELEC & IEC), European (ATEX) and Russian EAEU (EAC EX).

Heating Hazardous Areas With Electrical Heaters

Mud Tank Building, Boiler Packages, Service Rigs, Drilling Rigs, Paint Spray Booths, Offshore Cabins & Containers.