GE Sensing 4 Clamp-on Gas User Guide

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Clamp-on Gas Quick Guide

Small Pipe Air Application Limits

Pipe Size
ANSI (DIN)| Pipe Wall
inches (mm)| Min.
Pressure psig (bar)| Maximum Velocity, ft/s (m/s)
---|---|---|---
Single Traverse| Triple Traverse| Five Traverse
3/4 (20)| ≤0.07 (1.8)| 60 (5.1)| —| 90 (27.4)| 90 (27.4)
1 (25)| ≤0.14 (3.6)| 60 (5.1)| —| 90 (27.4)| 90 (27.4)
11/2 (40)| ≤0.15 (3.8)| 60 (5.1)| —| 90 (27.4)| 57 (17.4)
2 (50)| ≤0.16 (4.1)| 60 (5.1)| 90 (27.4)| 75 (22.9)| 45 (13.7)
3 (75)| ≤0.22 (5.6)| 60 (5.1)| 120 (36.6)| 69 (21.0)| —
4 (100)| ≤0.24 (6.1)| 60 (5.1)| 120 (36.6)| 53 (16.2)| —
≤0.34 (8.6)| 180 (13.4)
≤0.68 (17.3)| 300 (21.7)

Large Pipe Air Application Limits

Pipe Size
ANSI (DIN)| Pipe Wall
inches (mm)| Min. Pressure
psig (bar)| Maximum Velocity, ft/s (m/s)
---|---|---|---
Single Traverse| Double Traverse| Triple Traverse
| ≤0.28 (7.2)| 60 (5.1)| 90127.4)| 72 (22.0)| 54 (16.5)
≤0.44 (11.2)| 180 (13.4)
≤0.87 (22.1)| 300 (21.7)
8 (200)| ≤0.33 (8.4)| 60 (5.1)| 80 (24.4)| 64 (19.5)| 48 (14.6)
≤0.50 (12.7)| 180 (13.4)
≤0.88 (22.4)| 300 (21.7)
10 (250)| ≤0.37 (9.4)| 60 (5.1)| 70 (21.3)| 56 (17.1)| 42 (12.8)
≤0.50 (12.7)| 180 (13.4)
≤1.00 (25.4)| 300 (21.7)
12 (300)| ≤0.38 (9.7)| 60 (5.1)| 55 (16.8)| 44 (13.4)| 33 (10.1)
≤0.50 (12.7)| 180 (13.4)
≤1.00 (25.4)| 300 (21.7)
14 (350)| ≤0.38 (9.7)| 90 (7.2)| 87 (26.5)| 70 (21.3)| 52 (15.9)
≤0.50 (12.7)| 270 (19.6)
161400)| ≤0.38 (9.7)| 90 (7.2)| 76 (23.2)| 61 (18.9)| 45 (13.7)
≤0.50 (12.7)| 270 (19.6)
18 (450)| ≤0.38 (9.7)| 90 (7.2)| 67 (20.4)| 54 (16.5)| 40 (12.2)
≤0.50 (12.7)| 270 (19.6)
20 (500)| ≤0.38 (9.7)| 90 (7.2)| 60 (18.3)| 48 (14.6)| 36 (11.0)
≤0.50 (12.7)| 270 (19.6)
24 (600)| ≤0.38 (9.7)| 90 (7.2)| 49 (14.9)| 39 (11.9)| 29(8.8)
≤0.50 (12.7)| 270 (19.6)

Small Pipe Natural Gas Application Limits

Pipe Size
ANSI (DIN)| Pipe Wall
inches (mm)| Min. Pressure
psig (bar)| Maximum Velocity, ft/s (m/s)
---|---|---|---
Single Traverse| Dual Traverse| Triple Traverse| Four Traverse
2 (50)| ≤0.16 (4.1)| 200 (14.8)| 110 (33.5)| 88 (26.8)| 66 (20.5)| —
3 (75)| ≤0.22 (5.6)| 200 (14.8)| 120 (36.6)| 96 (29.3)| 72 (22.0)| 48 (14.6)
4 (100)| ≤0.24 (6.1)| 150 (11.4)| 120 (36.6)| 96 (29.3)| 72 (22.0)| 48 (14.6)
≤0.34 (8.6)| 400 (28.6)
≤0.68 (17.3)| 800 (56.2)
6 (150)| ≤0.28 (7.2)| 150 (11.4)| 120 (36.6)| 96 (29.3)| 72 (22.0)| —
≤0.44 (11.2)| 400 (28.6)
≤0.87 (22.1)| 800 (56.2)

Large Pipe Natural Gas Application Limits

Pipe Size
ANSI (DIN)| Pipe Wall
inches (mm)| Min. Pressure
psig (bar)| Maximum Velocity, ft/s (m/s)
---|---|---|---
Single Traverse| Dual Traverse| Triple Traverse
8 (200)| ≤0.33 (8.4)| 175 (13.1)| 100 (30.5)| 80 (24.4)| 60 (18.3)
≤0.50 (12.7)| 400 (28.6)
≤0.88 (22.4)| 800 (56.2)
10 (250)| ≤0.37 (9.4)| 200 (14.8)| 85 (25.9)| 68 (20.7)| 51 (15.6)
≤0.50 (12.7)| 500 (35.5)
≤1.00 (25.4)| 800 (56.2)
12 (300)| ≤0.38 (9.7)| 250 (18.3)| 70 (21.3)| 56 (17.1)| 42 (12.8)
≤0.50 (12.7)| 500 (35.5)
≤1.00 (25.4)| 800 (56.2)
14 (350)| ≤0.38 (9.7)| 300 (21.7)| 103 (31.4)| 77 (23.5)| 62 (18.9)
≤0.50 (12.7)| 800 (56.2)
16 (400)| ≤0.38 (9.7)| 300 (21.7)| 90 (27.4)| 67 (20.4)| 54 (16.5)
≤0.50 (12.7)| 800 (56.2)
18 (450)| ≤0.38 (9.7)| 300 (21.7)| 78 (23.8)| 59 (18.0)| 47 (14.3)
≤0.50 (12.7)| 800 (56.2)
20 (500)| ≤0.38 (9.7)| 300 (21.7)| 70 (21.3)| 52 (15.9)| 42 (12.8)
≤0.50 (12.7)| 800 (56.2)
24 (600)| ≤0.38 (9.7)| 300 (21.7)| 56 (17.1)| 42 (12.8)| 34 (10.4)
≤0.50 (12.7)| 800 (56.2)

Clamping Fixtures and High Temperature Dampening

Transducers

Pipe Size
(inches, mm)| Pipe Thickness
(inches, mm)| Transducer Type
@ Temp. (°F, °C)| Transducer
Frequency
(MHz)
---|---|---|---
¾ (20) to 2 (50)| Any| CRS-402 (<300, 150)
CRL-308 (<450, 232)| 1
2 ½ (60) to 12 (300)| < 0.2 (5.1) or Plastic| CRS-401 (<300, 150)
CRL-307 (<450, 232)| 0.5
2 ½ (60) to 12 (300)| >= 0.2 (5.1)| CRV-310 (<266, 130)
CRL-307 (<450, 232)| 0.5
6 (150) to 24 (600)| >= 0.2 (5.1), high P| CRW-312 (<266, 130)
CRW-318 (<350, 176)| 0.2 (0.25 for
Portable)

Pipe Geometry

• Minimum length > 10 ft (3 m) for 2-inch (50 mm) or smaller Pipes/Tubing
  

• Highest number of traverses without exceeding Vmax with even number preferred
  

Pipe Survey

• Thickness variation < 0.01 inch (0.25 mm) along length

• Avoid seams and circumferential welds

• Measure at 8 points and program average thickness

• Measure average OD
  

Pipe Preparation

• Remove insulation and loose/thick paint
  

• Polish transducer location area
  

Dampening/Fixture Installation

Operating Temperature <150 °F (65 °C) Installation Temperature >45 °F (7 °C)

Transducer Installation

• Couplants
  –CPL-01 (Silicone grease) or CPL-04 (Vacuum grease) for demonstrations and surveys
  –CPL-16 (RTV) for permanent installations

• Application
  –0.25-inch (6.4 mm) wide strip for pipes/tubing smaller than 4-inches (100 mm)
  –Entire transducer face for larger pipes

Wiring Diagram

Signal Troubleshooting

Flow Troubleshooting

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