CWF - Chung Wing Iron Works (International) Ltd. logo trademark
 
 


 
 
 

Cast Iron Pipes and Fittings with Socket and Spigot

BS437 Cast Iron Pipes and Fittings

http://www.chungwing.com/images/hang-pipes3.gif
 
 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Chung Wing Iron Works (International) Ltd. trademark and logo

 

CWF BS 437 Socket & Spigot Cast Iron Drainage Pipes

Introduction
Manufacturing Process
Technical Specifications
Pipes

Fittings

Storage & Handling
Laying Pipes & Fittings in Trench
Jointing
Cutting, Drilling, Tapping, and Repairing

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Chung Wing Iron Works (International) Ltd. trademark and logo
 

Introduction

    BS 437 Socket and Spigot Cast Iron Drainage Pipes has long been employed by the construction industry as a reliable and inexpensive drainage system.  At present there are two types of connection joints to choose from: rubber gasket flexible joint and caulk lead joint.  Flexible joint construction provides a certain degree of freedom for the pipe system to accomodate with ground settlement and other movement.  Furthermaore, it is easy to install reducing construction time.  Therefore, it has become increasingly popular as the choice of underground drainage as Hong Kong has many projects built on landfill.  While caulk lead joint is still widely used as it is the traditional installation method for many years.

    Chung Wing Iron Works' BS 437 and other cast iron products were first used in Hong Kong in 1952 at the North Point Healthy Village.  Ever since then, our products have now been used in over hundreds of building and civil projects.  This long history is a testimony to the quality of our products and sign of trust from our satisfying customers.

Manufacturing Process

    Our pipes from DN75 to DN225 are centrifugally cast; molten iron is poured into a spinning metal mold.  DN50, DN300 and above pipes are cast using continuous casting machine; molten iron into a metal mold section which moved vertically.   Our pipe fittings are cast using sand mold.  For the flexible joint pipe fittings, we used resin sand mold for the socket to create a more precise casting of the rubber gasket groove.

Technical Specifications

General

Cast Iron:

Tensile Strength > 150 N/mm2

BS1452 grade 150

Pipes & Fittings:

Dimensions

BS437

Hydrostatic Pressure (3.45 bar for 15 sec.) - pipes

BS437

Hydrostatic Pressure (1.70 bar for 15 sec.) - fittings

BS437

Coating test

BS3416

Flexible Joint (optional - for rubber ring joint)

BS6087

Rubber Gasket (optional - for rubber ring joint)

BSEN681-1


BS437 Dimensional Requirements for Caulk Lead Joint

Dimensions

Nominal size (DN)

BS437 cast iron pipe dimensional requirement

50

75

100

150

225

Pipe:

mm

mm

mm

mm

mm

  internal diameter, min.

a

48

74

99

150

226

  outside diameter, max.

b

65

92

119

173

256

  thickness, nominal

c

6

7

8

9

13

Socket:

mm

mm

mm

mm

mm

  internal diameter, min.

d

81

108

136

190

276

  outside diameter, max.

e

115

150

185

240

335

  thickness, min.

f

16

19

22

22

27

  thickness, min.

f1

9

13

14

14

17

  internal depth, nominal

g

75

75

75

90

115

(Note: for flexible joint, the above requirements apply to the pipe body only; there is no requirement for the socket)


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Chung Wing Iron Works (International) Ltd. trademark and logo

 

Pipes
Flexible Joint

Product No.

Size (DN)

L (mm)

CWF BS437 cast iron pipe flexible joint
CWF  BS437 cast iron pipe

010203

75

1830 & 4000

010204

100

1830 & 4000

010206

150

1830 & 4000

010208

200

4000

010209

225

1830 & 4000

010210

250

4000

010212

300

4000

010213

350

4000

010215

375

4000

010216

400

4000

010218

450

5000


Caulk Lead Joint

Product No.

Size (DN)

L (mm)

010303

75

1830 & 4000

010304

100

1830 & 4000

010306

150

1830 & 4000

010308

200

 4000

010309

225

1830 & 4000

010312

300

4000

010315

375

4000

010316

400

4000

010318

450

5000


Fittings - please specify flexible joint or caulk lead joint when ordering
(Only a small portion is being listed.  Although we will expand our listi over time, please contact us for more detail.)

Socket

Product No.

Size (DN)

BS437 cast iron pipe fitting - socket

030103

75

030104

100

030106

150

030108

200

030109

225

030110

250

030112

300

030113

350

030115

375

030116

400

030118

450

030120

500

030124

600

 

 

 

 

Chung Wing Iron Works (International) Ltd. trademark and logo

 

95 Bend

Product No.

Size
(DN)

BS437 cast iron pipe fitting - 95 deg. bend

BS437 cast iron pipe fitting - 95 deg. bend with access door

w/o access door

w/ access door

030203

030303

75

030204

030304

100

030206

030306

150

030209

030309

225

030210

030310

250

030212

030312

300

030213

030313

350

030215

030315

375

030216

030316

400

030218

030318

450

030220

030320

500

030224

030324

600


45 Bend

Product No.

Size
(DN)

BS437 cast iron pipe fitting - 45 deg. bend

BS437 cast iron pipe fitting - 45 deg. bend with access door

w/o access door

w/ access door

030403

030503

75

030404

030504

100

030406

030506

150

030409

030509

225

030412

030512

300

030415

030515

375

030418

030518

450

030420

030520

500

030424

030524

600


95 Junction

Product No.

Size
(DN)

BS437 cast iron pipe fitting - 95 deg. juction

BS437 cast iron pipe fitting - 95 deg. junction with access door

w/o access door

w/ access door

030603

030703

75

030604

030704

100

030606

030706

150

030609

030709

225

030610

030710

250

030612

030712

300

030613

030713

350

030615

030715

375

030616

030716

400

030618

030718

450

030620

030720

500

030624

030724

600

 

 

Chung Wing Iron Works (International) Ltd. trademark and logo

 

95 Reducing Junction

Product No.

Size
(DNxdn)

BS437 cast iron pipe fitting - 95 deg. reducing junction

BS437 cast iron pipe fitting - 95 deg. bend

w/o access door

w/ access door

030806

030906

100x50

030807

030907

100x75

030808

030908

150x100

030813

030913

225x100

030815

030915

225x150

030818

030918

300x150

030821

030921

300x225

030824

030924

375x225

030826

030926

375x300

030827

030927

450x225

030828

030928

450x300

030829

030929

500x225

030832

030932

500x300

030838

030938

500x450

030831

030931

600x225

030836

030936

600x300

030842

030942

600x450

030844

039044

600x500


45 Reducing Junction

Product No.

Size
(DNxdn)

BS437 cast iron pipe fitting - 45 deg. reducing junction

BS437 cast iron pipe fitting - 95 deg. bend

w/o access door

w/ access door

031208

031308

150x100

031213

031313

225x100

031215

031315

225x150

031218

031318

300x150

031221

031321

300x225

031224

031324

375x225

031226

031326

375x300

031227

031327

450x225

031228

031328

450x300

031229

031329

500x225

031232

031332

500x300

031238

031338

500x450

031231

031331

600x225

031236

031336

600x300

031242

031342

600x400



 

Chung Wing Iron Works (International) Ltd. trademark and logo

 

45 Junction

Product No.

Size
(DN)

BS437 cast iron pipe fitting - 45 deg. junction

BS437 cast iron pipe fitting - 45 deg. junction

w/o access door

w/ access door

031004

031104

100

031006

031106

150

031009

031109

225

031012

031112

300

031015

031115

375

031018

031118

450


95 Double Junction

Product No.

Size
(DN)

BS437 cast iron pipe fitting - 95 deg. double junction

BS437 cast iron pipe fitting - 95 deg. double junction with access door

w/o access door

w/ access door

031404

031504

100

031406

031506

150

031409

031509

225

031412

031512

300


95 Double Reducing Junction

Product No.

Size
(DNxdnxdn)

BS437 cast iron pipe fitting - 95 deg. double reducing junction

BS437 cast iron pipe fitting - 95 deg. double reducing junction with access door

w/o access door

w/ access door

031610

031710

100x50x50

031613

031713

150x100x100

031615

031715

225x100x100

031618

031718

300x150x150

031621

031721

300x225x225

031624

031724

375x225x225

031627

031727

375x300x300

031628

031728

450x225x225

031629

031729

450x300x300

031630

031730

450x300x300


45  Double Junction

Product No.

Size
(DN)

BS437 cast iron pipe fitting - 45 deg. double junction

BS437 cast iron pipe fitting - 45 deg. double junction with access door

w/o access door

w/ access door

031804

031904

100

031806

031906

150



Chung Wing Iron Works (International) Ltd. trademark and logo

 

45 Double Reducing Junction

Product No.

Size
(DNxdnxdn)

BS437 cast iron pipe fitting - 45 deg. double reducing junction

BS437 cast iron pipe fitting - 45 deg. double reducing junction with access door

w/o access door

w/ access door

032010

032110

150x100x100

032015

032115

225x150x150

032018

032118

300x150x150

032021

032121

300x225x225

032024

032124

375x225x225

032027

032127

375x300x300

032029

032129

450x225x225

032030

032130

450x300x300

032032

032132

500x225x225

032033

032133

500x300x300

032036

032136

600x225x225

032036

032136

600x300x300


Medium Radius Bend

Product No.

Size
(DN)

BS437 cast iron pipe fitting - medium radius bend

BS437 cast iron pipe fitting - medium radius bend with access door

w/o access door

w/ access door

032203

032303

75

032204

032304

100

032206

032306

150

032209

032309

225

032212

032312

300

032214

032314

350

032215

032315

375


600R Large Radius Bend

Product No.

Size
(DN)

BS437 cast iron pipe fitting - 600R large radius bend

BS437 cast iron pipe fitting - 600R large radius bend

w/o access door

w/ access door

032404

032504

100

032406

032506

150

032409

032509

225


700R Large Radius Bend

Product No.

Size
(DN)

BS437 cast iron pipe fitting - 700R large radius bend

BS437 cast iron pipe fitting - 700R large radius bend

w/o access door

w/ access door

032604

032704

100

032606

032706

150

032609

032709

225

 

 

 

Chung Wing Iron Works (International) Ltd. trademark and logo

 

Deep Seal P-Trap

Product No

Size
(DN)

BS437 cast iron pipe fitting - deep seal p-trap

033201

100

033202

 150

033203

225

033204

300

033205

375

033206

450

033207

600


Deep Seal Intercepting P-Trap with Reverse Cleaning Socket and Stopper

Product No

Size
(DNxdn)

BS437 cast iron pipe fitting - deep seal intercepting p-trap

033301

100x75

033302

 150x100

033303

225x150

033304

300x150

033305

375x225

033306

450x225

033307

600x300


Concentric Reducer

Product No.

Size (DN)

BS437 cast iron pipe fitting - concentric reducer

033406

100x50

033407

100x75

033410

150x100

033415

225x150

033417

300x225

033424

375x225

033427

375x300

033425

450x150

033428

450x225

033430

450x300

033433

450x375

033434

450x400

033429

500x225

033436

500x375

033438

500x450

033435

600x225

033439

600x375

033442

600x450

033444

600x500

 

 



 

Chung Wing Iron Works (International) Ltd. trademark and logo

 

Inspection Chamber Branches

Product No.

Size
(DN)

BS437 cast iron pipe fitting - inspection chamber branch

036004

100


Inspection Chamber Double Branches

Product No.

Size
(DN)

BS437 cast iron pipe fitting - inspection chamber double branches

036104

100


Storage & Handling

    All of our cast iron products should be avoid direct contact with the ground.  Furthermore, whenever it is possible, they should be covered to prevent any possible damages during storage before installation.

Laying Pipes in Trench

    If the pipes or fittings are needed to be laid in a trench, care should be taken when lowering into a tranch to avoid demaging the pipes and fittings.  Furthermore, the trench should be clear of any large stones which may cause uneveness of the pipe line and inflict demages on the pipes and fittings.

Jointing
    Our BS437 pipes and fittings have sockets for jointing by using caulk lead or rubber gasket flexible joint.

Cutting, Drilling, Tapping, and Repairing

    Cast iron has excellent machinability; therefore, our pipes and fittings can be cut, drill or tap.  For cutting, one can use a mechanical saw, wheel cutter or powered disk cutter.  For drilling, one can use a powered hand drill or bench drill.  For tapping, it is common to use a tapping saddle.

    If a pipe or fitting has minor demage, which does not affect the structural integrety, one can repair it by welding or method approved by consultant engineer.  If there is any questions, one can contact our office for advise.



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Homepage: http://www.chungwing.com/index.html          Contact: http://www.chungwing.com/contact.html
Address: Ground Floor, 12 Beech Street, Tai Kok Tsui, Kowloon, Hong Kong
Tel: (852)2392 2580, 2392 9050        Fax: (852)2787 2933


copyright 2005, Chung Wing Iron Works (International) Ltd.