Emerson Process Management 5300 manual Mounting in Chamber/ Still Pipe, Material, Polypropylene

Reference Manual

00809-0100-4530, Rev BA July 2009

Rosemount 5300 Series

Table 3-2. Pulling force on probe installed in tanks with different products

Material		Tensile load for 0.16 in. (4 mm)						Tensile load for 0.24 in. (6 mm)
		flexible single lead probe, lb (kN)						flexible single lead probe, lb (kN)
	Probe length 49 ft (15 m)			Probe length 115 ft (35 m)			Probe length 49 ft (15 m)			Probe length 115 ft (35 m)
	Tank Ø=		Tank Ø=	Tank Ø=	Tank Ø=		Tank Ø=		Tank Ø=	Tank Ø=	Tank Ø=
	10 ft (3 m)		39 ft (12 m)	10 ft (3 m)	39 ft (12 m)		10 ft (3 m)		39 ft (12 m)	10 ft (3 m)	39 ft (12 m)
Wheat	670 (3)		1120 (5)	1800 (8)	4500	(20)	900 (4)		1690 (7.5)	2810 (12.5)	6740 (30)
					Exceeds tensile						Exceeds tensile
					strength limit						strength limit
Polypropylene	340 (1.5)		670 (3)	810 (3.6)	2360	(10.5)	450 (2)		920(4.1)	1190 (5.3)	3510 (15.6)
Pellets
Cement	900 (4)		2020 (9)	2470 (11)	7310	(32.5)	1350 (6)		2920 (13)	3600 (16)	10790 (48)
					Exceeds tensile						Exceeds tensile
					strength limit						strength limit

Mounting in Chamber/ Still Pipe

NOTE!

For environments where electrostatic discharges (plastics) are likely to occur, it is recommended that the probe end is grounded.

The chamber is also known as bridle, side pipe, bypass pipe, and cage. Dimensioning the chamber correctly and selecting the appropriate probe is key to the success in these applications.

To prevent the probe from contacting the wall, centering discs are available for the Rigid Single, Flexible Single, and Flexible Twin Lead Probes. The disc is attached to the end of the probe, and thus keeps the probe centered in the chamber. See also “Mounting a Centering Disc for Pipe Installations“ on page 3-25.

Make sure that the probe does not come into contact with the chamber wall, e.g. by using a centering disk.

NOTE!

To avoid disturbances from object near the pipe, metal-pipes are preferred, especially in applications with low dielectric constant.

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