Horseley Bridge Tanks Brochure

HORSELEY BRIDGE TANKSOver a century of experience

PRESSED STEELSECTIONALWATER TANKSwww.hbtanks.com

Steel sectionalwater tanks

Technical data

Information

Contents

Horseley Bridge Tanks 1

Pressed steel sectional water tanks 2

Site installation 4

Accessories 7

Nominal capacity charts 8

Horseley BridgeTanks Ltd

1

Pressed steel tanks with capacities from 1000-8,000,000 litres

have been installed for water supply projects, food and

process industries, hotels, railways, hospitals and many more.

This is a proven technology, providing tanks and supporting

towers with an outstanding track record.

HB tanks can be found throughout the UK and around the

world, particularly in the emerging nations, where water –

the basis of life – is often difficult to obtain and has to be

preciously guarded.

The development of Horseley Bridge’s EPDM rubber sealing

system, combined with the application of various coatings

suitable for the storage of potable water, has made safe

storage of this valuable resource even more certain.

Tanks can be provided for ground level installation or

elevated on steel structures that are specifically designed

and fabricated by HB.

Horseley Bridge TanksOver a century of experience

The bolted and sealed sectional tank was originated by

Horseley Bridge Tanks back in 1880 and the company has

led the world in water storage technology ever since.

Horseley Bridge Tanks is now part of Balmoral Tanks Ltd and

the combined experience of the companies provides the

water storage industry with a choice of pressed steel and

glass reinforced plastic (GRP) products that stand the test

of time. Improvements are made continuously through our

evaluation and development programme.

The Horseley Bridge pressed steel sectional tank has an

extremely rugged but highly portable design, which is ideal

for use in sites with restricted access and for shipment into

the most inaccessible areas of the world using the most

basic means of transport.

Assembly is simple and quick, requiring only hand tools and

the minimum of skilled labour.

2

Pressed steel sectional water tanksFor potable and non-potable water storage

Design, performance and construction

Caged external ladder

Gable endfillers

Lockable hinged orbolted manway

Screened vent Pitched weatherproof cover

Rafter

Internalbracing

Length of walls to extend 200mmbeyond width of tank

Ground level

1220mm

500m

mm

in

230mm max

Low physical profile (at ground level)

Ideal for temporary requirements being simple to dismantle

Technical support provided for site measurementsand advice

Technical drawings provided

Full tank erection and site inspection by trained staff

Design and supply of steel towers for elevated tanks

Proven track record over many years

Approved by the Water Regulations Advisory Scheme (WRAS)for potable water storage

Manufactured under formal quality assurance procedures toBSEN ISO 9001

Tough, vandal resistant for unsupervised sites

Easy to build, only moderate skills required

No on-site welding, no fire hazard

Flexible system, capacity almost infinitely extendable

3

General construction

Horseley Bridge pressed steel tanks are bolted mild steel

sectional water storage containers. Plates are hot-pressed in

our factory in the UK to BS1564:1975 Type 1. The panels are

manufactured in 1m2 and 1.22m2 (4ft2) sizes with thicknesses

ranging from 4-6mm depending on tank depth and use. Steel

used in plates, stays, cleats, etc, conforms to BSEN10025:1993

S275JR (43A equivalent).

Plate dimensions are 1m or 4ft square. Half plates are

available. Tank plates are bolted together using a Water

Regulations Advisory Scheme (WRAS) approved sealant. For

ease of access to bolts, tanks are supplied with external

flanges unless customers specify otherwise.

To support pressures exerted by the tank’s contents, the sides

of all tanks at the junction of four plates are supported by

rolled steel angle stays attached to cleats of equal strength

bolted to tank plates. The pattern of internal stays depends on

tank size and varies between horizontal, vertical and diagonal.

Storage of liquids

The bolted construction of the tanks allows storage of water

up to 90ºC. Temperatures in excess of this would require the

tank to be fully seam welded. For clarification of storing other

liquids please consult our engineering department.

To maintain water quality, tanks should be periodically drained,

cleaned and disinfected. To ensure continued water supply

during cleaning, divided tanks can be supplied where one

compartment is used while the other is cleaned. See

BS6700:1997 for additional advice.

Cover and roofs

The roof construction of all Horseley Bridge tanks is designed

to support the weight of maintenance personnel and their

equipment. Design superimposed load is 0.75kN per m2.

Flat covers can be provided for use inside buildings. Pitched

roofs are recommended for outdoor use to allow rainwater to

run off. All roofs are fitted with a lockable 600mm2 hinged and

sealed manhole. Screened (0.65mm mesh) cowl ventilators are

provided as standard.

The ends of pitched roofs are closed with stiffened gable

fillers which are bolted to the roof and wall plates.

All joints incorporate jointing strip to make them weather and

vermin proof.

Pressed steel tanks are not designated as pressure vessels, but

in special circumstances the roof can be constructed from

standard plates to allow a slight internal pressure. If this is

required, please consult our engineering department.

Laser cutting

Horseley Bridge Tanks uses the latest laser cutting technology

to bring high levels of accuracy to its panels. The cutters use a

3D capability providing precise, repeatable, burr-free profiles

and are BSEN ISO 9001 certified.

Indicates plate thickness in mm

Base

Base

Tank

depth

Tank

depth

Horseley BridgeTanks Ltd

Site installationTank erection

Horseley Bridge Tanks provides a full UK tank erection service.

Each site is inspected by a qualified supervisor prior to tank

erection ensuring site and base suitability. An experienced

team will build your tank and leave it ready for

commissioning. Supervisors may also be provided for overseas

contracts. Customers should, however, observe the following

check points before calling HB to site:

Tank supports

Externally flanged tanks at ground/floor level require dwarf

walls or piers, made of steel univeral beams, brick or

concrete, with footings suitable for the bearing capacity of the

sub-soil. The walls should be at least 500mm high and must run

in one direction only with centres at 1000mm or 1220mm

depending on the plate dimensions. They should extend at

least 150mm beyond the tank at each end.

Dwarf walls should be between 150 and 225mm wide and

should taper to no more than 110mm at the top to give access

for spanners when bolting the bottom joints.

Supports for tanks of 3660mm and over should ideally have capping

flats under the bottom flanges to give a greater bearing surface.

Alternatively, steel supports may be used, in which case customers

are advised to consult HBT engineers regarding their design.

4

5

Access

To allow access to bolts, a clearance of 500mm should be

provided all round the tank. When tanks are fitted with

covers, a distance of 750mm should be left between the cover

and any ceiling to allow access to the manhole. It is the

customer’s responsibility to ensure adequate clearance around

the tank.

Health and safety

HB reserves the right to refuse to carry out work in unsafe

conditions. Erectors will observe site safety rules under

relevant national and local health and safety regulations.

Delays

HB reserves the right to make additional charges for

delays caused by preparatory work not being

completed in accordance with its requirements.

84

AccessoriesPipe connections and fittings

All pipe connections are made at HB’s factory before

dispatch and customers are asked to provide full details

when ordering. The type of pipe connection should be

specified together with the relevant standard to which the

coupling flanges are drilled or the pipes screwed. To assist

delivery, the size and position of each connection should

also be specified at the time of ordering. Ball and gate

valves and all pipework, including bends and flanges, can

be supplied if specified at the time of ordering.

Connections can be supplied as flanged stools to BS4504,

ASA or DIN standards, or, for small pipework, screwed

sockets to BS1387. The connections are shop-welded to the

plates in positions agreed at the time of order.

Pipework configuration

The inlet or delivery pipe can enter the tank through either

the side wall at the top of the tank or through the tank

base. Flow can be controlled through a ball valve,

equilibrium float valve or automatic float switch.

The outlet or service pipe should be taken through the base

of the tank and fitted with an internal bellmouth pipe or

rose strainer to prevent suspended matter entering the

water supply.

The overflow should always be fitted to give at least 75mm of

freeboard below the top of the tank in accordance with the

UK Water Byelaws, or other regulations, to give the required

air gap.

The washout pipe opening should be fitted flush with the

bottom of the tank and a sluice valve fitted immediately

below the tank base.

Optional extras

• Ball-valve housing used to raise water level to

maximise storage

• Screened overflows and warning pipes to Water

Regulation 16 (UK Byelaw 30)

• Internal and external mild steel ladders complete

with safety hoops and rails

• Walkways with railings

• Indicator gear or contents gauges

• Air gaps to latest WRAS guidelines

Towers

When a constant pressure head of water is required for supply

purposes, tanks can be mounted on a steel tower at a suitable

height. Towers must be designed with suitable seismic and

wind loads to BS5950 Pt1:1990

Insulation

Horseley Bridge Tanks uses an integrated insulation system

which is mechanically fixed to the steel plates and

incorporates "Envirotherm 70" EPS foam insulation. The foam

is dimensionally stable with very low water ingress ensuring

long term thermal performance. It is made from a pentane

expansion agent which is CFC and HCFC free and can be

recycled by melting down and reforming.

The external skin of the panel is manufactured in UV resistant

thermoplastic giving an overall typical thickness of 95mm

providing a typical U value of less than 0.4 W/m2K.

Surface coatings and finishes

A wide range of coatings can be applied to the inside and

outside of the tanks which include hot dip galvanising (BSEN

ISO 1461:1999) and WRAS approved systems. Horseley Bridge

Tanks also offers a DWI (Drinking Water Inspectorate) approved

coating which meets the requirements of Regulations 31-33

(Reg 25 in Scotland) of the Water Supply (Water Quality)

regulations.

Horseley Bridge Tanks provides a full design and supply service

for towers, to BS5950. When specifying tower requirements it

may be advisable to anticipate future increases in tank

Encapsulation skin

“Envirotherm 70” insulation

Recess for insulationfixing brackets

capacity. Customers are advised to consider foundation

requirements and to let HB know what additional loadings on

towers may be required in the future.

On request HB can supply loading and uplift details enabling

contractors to design suitable foundations.

Filling and testing

This should be done as soon as possible after the tank is built

and in any event within the time specified in Horseley Bridge

warranty conditions. HB’s contract does not provide for a

member of staff being present during filling.

Conditions of contract

All work is carried out under HB conditions of sale as stated in

the original quotation. Extra copies are available on request.

8

Nominal capacity chartsMetric and imperial

1m module tanksTank capacities in litresTo convert to gallons divide by 4.546

Length xbreadth(m)

2m deepcapacity(litres)





2 x 1 2000 4000 6000 8000 10000

3 x 1 3000 6000 9000 12000 15000

2 x 2 4000 8000 12000 16000 20000

3 x 2 6000 12000 18000 24000 30000

4 x 2 8000 16000 24000 32000 40000

3 x 3 9000 18000 27000 36000 45000

4 x 3 12000 24000 36000 48000 60000

4 x 4 16000 32000 48000 64000 80000

5 x 4 20000 40000 60000 80000 100000

5 x 5 25000 50000 75000 100000 125000

6 x 5 30000 60000 90000 120000 150000

6 x 6 36000 72000 108000 144000 180000

7 x 6 42000 84000 126000 168000 210000

7 x 7 49000 98000 147000 196000 245000

8 x 8 64000 128000 192000 256000 320000

10 x 8 80000 160000 240000 320000 400000

9 x 9 81000 162000 243000 324000 405000

10 x 10 100000 200000 300000 400000 500000

11 x 11 121000 242000 363000 484000 605000

12 x 12 144000 288000 432000 576000 720000

13 x 12 156000 312000 468000 624000 780000

13 x 13 169000 338000 507000 676000 845000

1.22m module tanksTank capacities in litresTo convert to gallons divide by 4.546

Length xbreadth(m)

2.44m deepcapacity(litres)




2.44 x 1.22 3632 7264 10896 14528

3.66 x 1.22 5448 10896 16344 21792

2.44 x 2.44 7364 14528 21792 29056

3.66 x 2.44 10896 21792 32688 43584

4.88 x 2.44 14528 29056 43584 58112

3.66 x 3.66 16344 32688 49032 65376

4.88 x 3.66 21792 43584 65376 87168

4.88 x 4.88 29056 58112 87168 116224

6.10 x 4.88 36320 72640 108960 145280

6.10 x 6.10 45400 90800 136200 181600

7.32 x 6.10 54480 108960 163440 217920

7.32 x 7.32 65376 130752 196128 261504

8.54 x 8.54 88984 177968 266952 355936

9.76 x 8.54 101696 203392 305088 406784

9.76 x 7.76 116224 232448 348672 464896

10.98 x 9.76 130752 261504 392256 523008

10.98 x 10.98 147096 294192 441288 588384

12.20 x 10.98 163440 326880 490320 653760

12.20 x 12.20 181600 363200 544800 726400

13.42 x 13.42 219736 439472 659208 878944

14.64 x 14.64 261504 523008 784512 1046016

15.86 x 15.86 306904 613808 920712 1227616

Positioning of pipe connections

Connection details (flanges or pads)

Nominaldiameter(mm)

Flange outsidediameter (mm)

Pitchcircle

Bolts (or studs)

Number Diameter

Metre square plate

B C D E

4ft square plate

B C D E

Preferred positions

25 115 85 4 M12 110 365 275 110 110 250 275 110

40 150 110 4 M16 125 350 315 125 125 235 315 125

50 165 125 4 M16 135 340 335 135 135 225 335 135

65 185 145 4 M16 145 330 360 145 145 215 360 145

80 200 160 8 M16 150 325 375 150 150 210 375 150

100 220 180 8 M16 160 315 400 160 160 200 400 160

125 250 210 8 M16 175 300 435 175 175 185 435 175

150 285 240 8 M20 195 280 480 195

175 315 270 8 M20 210 265 515 210

200 340 295 12 M20 220 255 545 220

BS 4504 – NP16 A = 609mm A = 500mm

A

BC

D

E

Note

It is preferable to make positions A and B the standard positions and for economy these should

be used whenever possible. Positions C, D and E show the maximum variations from positions A

and B so as to clear the strengthening impressions in the plate. If required, larger pipe flanges

can be easily accommodated.

These charts are not exhaustive as tanks can be configured to suit any application

Additional rangesIn addition to its pressed steel sectional tanks,

Horseley Bridge Tanks, in association with

sister company Balmoral Tanks, also produces

glass reinforced plastic sectional tanks and a

selection of one-piece GRP tanks ranging from

340-4550 litres (75-1000 gallons) to BS

EN13280:2001 standards.

Visit www.balmoraltanks.com for more

information or contact our experienced sales

team at the address below.

HORSELEY BRIDGE TANKS

Garth Works, Taffs Well, Cardiff CF15 7YF

Tel +44 (0)2920 815270 Fax +44 (0)2920 815275

Email [email protected] www.hbtanks.co.uk

HBT-0311-REV03

Horseley Bridge Tanks Brochure

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