Different Steam Trap Arrangements on Steam Headers in Piping System

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Description: Steam trap arrangement
MATERIAL LIST
ITEMQTYSIZE (NB)
HALF COUPLING220
PIPE1 m20
VALVE (GATE / GLOBE)220
STEAM TRAP WITH INTEGRAL STRAINER120
Description: Steam trap arrangement line running at grade closed system
MATERIAL LIST
ITEMQTYSIZE (NB)
HALF COUPLING220
PIPE15 m20
VALVE (GATE / GLOBE)420
CHECK VALVE120
EQUAL TEE120
STEAM TRAP WITH INTEGRAL STRAINER120
Description: Steam trap arrangement for overhead line open system
MATERIAL LIST
ITEMQTYSIZE (NB)
HALF COUPLING220
PIPE12 m20
VALVE (GATE / GLOBE)320
EQUAL TEE120
STEAM TRAP WITH INTEGRAL STRAINER120
Description: Steam trap arrangement for overhead line closed system
MATERIAL LIST
ITEMQTYSIZE (NB)
HALF COUPLING220
PIPE18 m20
VALVE (GATE / GLOBE)520
CHECK VALVE120
EQUAL TEE220
STEAM TRAP WITH INTEGRAL STRAINER120
Description: Steam trap arrangement for steam tracer open system
MATERIAL LIST
ITEMQTYSIZE (NB)
EQUAL TEE115
VALVE (GATE / GLOBE)215
STEAM TRAP WITH INTEGRAL STRAINER115
PIPE2 m15
Description: Steam trap arrangement for steam tracer closed system
MATERIAL LIST
ITEMQTYSIZE (NB)
EQUAL TEE215
VALVE (GATE / GLOBE)415
CHECK VALVE115
STEAM TRAP WITH INTEGRAL STRAINER115
PIPE10 m15
Description: Steam trap arrangement for grade line control valve open system
MATERIAL LIST
ITEMQTYSIZE (NB)
HALF COUPLING220
PIPE0.6 m20
VALVE (GATE / GLOBE)220
STEAM TRAP WITH INTEGRAL STRAINER120
Description: Steam trap arrangement for grade line control valve closed system
MATERIAL LIST
ITEMQTYSIZE (NB)
HALF COUPLING220
PIPE15 m20
VALVE (GATE / GLOBE)420
CHECK VALVE120
EQUAL TEE120
STEAM TRAP WITH INTEGRAL STRAINER120

Maximum spacing of steam traps & drip legs

1.      This guide is an approximation for maximum spacing of steam traps when used for condensate drawing of steam supply headers

Metres 
(feet)

2.      It is based on a condensate formation rate of 70 to 80 kg/hr (150 to 180 lb/hr) under normal running conditions for insulated steel pipe at 150c (600f) ambient temperature.

3.      During the warming up period it is possible that the condensate formation rate will on average exceed the normal formation rate by a factor of 10.

SATURATED STEAM PRESSUREkg/cm2(PSIG)STEAM SUPPLY HEADER SIZEMM
(INCH)
80 & UNDER 
(3″ & UNDER)
100 & 150 
(4″ & 6″)
200 & 250 
(8″ & 10″)
300 & 400
(12″ & 16″)
450 & 500
(18″ & 20″)
600 
(24″)

(125)
150 
(500)
150
(500)
120
(400)
105
(350)
90
(300)
75
(250)
18
(250)
150
(500)
135
(450)
90
(300)
90
(300)
75
(250)
60
(200)
32
(450)
120
(400)
105
(350)
90
(300)
75
(250)
60
(200)
45
(150)
42
(600)
120
(400)
105
(350)
75
(250)
75
(250)
60
(200)
45
(150)
63
(900)
120
(400)
90
(300)
75
(250)
75
(250)
60
(200)
45
(150)
Description: Condensate drip leg
HEADER NOM. DIA 
mm 
(inch)
DRIP LEG DIMENSIONS
mm
(inch)
20

(3/4″)
20

(3/4″)
25

(1″)
25

(1″)
40

(1 1/2″)
40

(1 1/2″)
50

(2″)
50

(2″)
80

(3″)
80

(3″)
100

(4″)
100

(4″)
150

(6″)
150

(6″)
200

(8″)
150

(6″)
250

(10″)
150

(6″)
300

(12″)
150

(6″)
350

(14″)
200

(8″)
400

(16″)
200

(8″)
450

(18″)
200

(8″)
500

(20″)
200

(8″)
600

(24″)
200

(8″)
750

(30″)
250

(10″)
900

(36″)
250

(10″)
1050

(42″)
250

(10″)
1150

(46″)
250

(10″)
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Prabhu TL is an author, digital entrepreneur, and creator of high-value educational content across technology, business, and personal development. With years of experience building apps, websites, and digital products used by millions, he focuses on simplifying complex topics into practical, actionable insights. Through his writing, Dilip helps readers make smarter decisions in a fast-changing digital world—without hype or fluff.
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