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Economizer for Boiler

air-cooled heat exchanger (air cooler)

material

standard & specification

 
Steel tube's tolerances in dimensions
Specification

Outside Diameter / Tolerance

Tolerance of Wall thickness

ASTM A 450

< 25.4mm

< 38.1mm

< 50.8mm

> 50.8 mm

-0/+20
(min. wall)

+/- 0.10mm

+/-0.15mm

+/-0.20mm

+/-0.25mm

ASTM A 530

< 48.3mm

> 48.3mm

   

+/-12.5%

+0.4/-0.8mm

+/-0.8mm

   

ASTM A 269

< 38.1mm

< 63.5mm

   

+/-10%

+/- 0.13mm

+/-0.25mm

   

EN-ISO 1127

TC D2

+/-1.00%min.+/-0.5mm

T 2 +/-12.5% min.+/-0.40mm

TC D3

+/-0.75%min.+/-0.3mm

T3+/-10%min.+/-0.20mm

TC D4

+/-0.50%min.+/-0.1mm

T4+/-7.5%min.+/-0.15mm

DIN 28180

 

16-20mm

25mm

30mm

38mm

<2mm/>2mm

TC 1

+/-0.10mm

0.12mm

0.15mm

0.20mm

+/-0.2mm/+/-10%

TC 2

0.30mm

0.30mm

0.30mm

0.40mm

+/-0.2mm/+/-10%

TC 3

       

+/-0.2mm+15/-10%


standard

OD(mm)

wt(mm)

L(mm)

SIZE

tolerance

size

tolerance

SIZE

tolerance

ASTM
A312

[10.29,48.26]

+0.40/-0.80

10.3-73

88.9-457 T/D<5%

88.9-457 T/D>5%

>508 T/D<5%

>508 T/D>5%

+20%- 12.5%
+22.5% 12.5%
+15%- 12.5%
+22.5%-12.5%
+15%,- 12.5%

+6/-0
(48.26,114.30]

+0.80/-0.80

(114.30,219.08]

+1.60/-0.80

(219.08,457.20]

+2.40/-0.80

ASTM A213

D<25.4

+0.10/-0.10

D≤38.1

+20%/-0

D<50.80

+3/-0

[25.4,38.1]

+0.15/-0.15

(38.1,50.8)

+0.20/-0.20

D>38.1

+22%/-0

D≥50.8

+5/-0

[50.8,63.5)

+0.25/-0.25

[63.5,76.2)

+0.30/-0.30

[76.2,101.6]

+0.38/-0.38

(101.6,190.5]

+0.38/-0.64

(190.5,228.6]

+0.38/-1.14

ASTM
269

D<12.7

+0.13/-0.13

±15%

+3.2/-0

(12.7,38.1]

±10%

[38.1,88.9)

+0.25/-0.25

+4.8/-0

[88.9,139.7)

+0.38/-0.38

[139.7,203.2)

+0.76/-0.76

JIS
G3459

D<30

+0.30/-0.30

S<2 ±20

 

D≥30

±1%

S≥2 ±10%

JIS
G3463

D<40 +0.25/-0.25

D<40;S<2

+0.40/-0

D≤50;L≤7

+7/-0

[40,50)

D<50;L>7

every 3 meters in addition, deviation increase 3 mm, max. deviation is 15mm

[50,60)

[60,80)

+0.30/-0.30

D<40;S≥2

+20%/-0

[80,100)

+0.40/-0.40

[100,120)

+0.40/-0.60

D>50;L≤7

+10/-0

[120,160)

+0.40/-0.60

D≥40

+22%/-0

D>50;L>7

sam with D<50;L≥7m

[160,200)

+0.40/-0.60

D≥200

+0.40/-1.60

DIN17456
DIN17458

D2

±10%±0.5min

    

 

T4


  ±10% 0.2min
  ±7.5% 0.15 min
D≤40; L≤1m D≤40; L;(1-2)mD≤40; L; (2-3)m

D≤40; L; (3-4)m

D≤40; L; (4-8)m

+1/-0
+2/-0
+3/-0
+4/-0
+5/-0

D3

±0.75%±0.3min

±0.5%±0.1min

40<D<168

L≤6m +5/-0
L>6m +10/-0

ASTM A511 TABALE3

D<12.7 +0.13/-0.13   ±15%

+3.2/-0
[12.7,38.1) ±10% +4.8/-0
[38.1,88.9) +0.25/-0.25
[88.9,139.7) +0.38/-0.38
[139.7,203.2) +0.76/-0.76

[203.2,219.8)

+1.14/-1.14

[219.8,323.85)

+1.57/-1.57

ASTM A511 TABALE4

D≤76.2

+0.56/-0.58

S≤2.77 ±16.5%

+4.76/-0

D≤76.2

0.56/-0.58

S≤2.77

±16.5%

2.77<S≤4.37

±15%

4.37<S5.16

±14%

S>5.16

±12.5%

(76.2,139.7]

+0.79/-0.79

S≤2.77

±16.5%

2.77 S 4.37

±15%

4.37<S5.16

±14%

S>5.16

±12.5%

(139.7,203.2]

+1.19/-1.19

4.37<S 5.16

±14%

S>5.16

±12.5%

 
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