Samplers

Description

Samplers are a variety of sampling devices that are used for crude oil and liquefied petroleum gases sampling from surface and underground tanks and vessels to determine their quality. The choice of type depends on the sampling method and purpose. For example, in the process of liquids storing, it may be necessary to take a sample from the upper or lower layers, or from several layers at a time, or there is a need to determine the average values of the stored liquid.

Application rules, operating conditions, the design of samplers supplied by the Saratov Reservoir Plant meet the requirements of the following state standards:

• GOST 2517-2012 "Oil and oil products. Sampling methods";
• GOST 13196-93 "Level-measuring devices and sampling of oil and petroleum products"
• GOST 31873-2012 "Oil and petroleum products. Manual sampling methods"
• GOST 14921-78 "Liquified petroleum gases. Sampling methods (as amended № 1, 2, 3)"

Thus, in accordance with the rules, there are the following structural designs of samplers:

• stationary
• portable
• automatic
• manual (hand-held)

General technical specifications of application conditions

• pressure - up to 25 MPa
• the maximum depth of sampling - 25 m
• speed of sampling - up to 200 mm/min.
• operating temperature - from 50°C to +100°C
• density - up to 1200 kg/m³
• kinematic viscosity - up to 0.60 m²/s and more
• measurement error - up to ±20 mm or 5%

Types, principle of action and design of oil samplers

Depending on the purpose the Plant SARRZ offers to provide vertical tanks with the following types of samplers:

• hand-held sampler PO
• stationary partitioned sampling apparatus PCR and PСRP
• stationary three-level decreased sampler PSRT for point sampling from three pre-set levels
• stationary sampler PSPR with float for layer-by-layer sampling
• float sampler PP for layer-by-layer sampling from three levels
• portable sampler PPN for truck or railway tanks and horizontal tanks
• stationary sampler PSR OT of an organ type, with the possibility of sampling from the 31 levels

Hand-held samplers PO

They ensure the safety of the oil sample, allow to sample at any height, eliminate the occurrence of disturbances on the oil level and do not effect other stationary equipment.

PO samplers are manufactured in climatic category N and NF.

Drawing	Criteria	PO–1	PO–2
	Overall dimensions, mm, max
	diameter D	74	72
	height H	250	215
	Weight, kg, max	1.15	1,.2

Stationary partitioned sampling apparatus PCR and PСRP

Partitioned samplers are used for composite (integrated) sampling at any height of oil level. Samplers PСRP are used with tanks with a pontoon or a floating roof. They are installed through a manhole (for RVS with a fixed roof) or a pontoon pipe and can be operated at a pressure of up to 0.7 MPa.

The sampling process is semi-automatic.

High quality and purity of the sample is ensured by the ingress of the operating medium into the gathering device through separate bleed-off columns, and then the outlet pipeline. The tubes are installed at different depths, sample and deliver oil sample to the holding tank for integral analysis.

Structurally stationary partitioned samplers PСR (PСRP) consist of the bottom, center and top sections, which are connected by socked joint. When sampling from one of the levels, the ball valve is closed and shuts off the the liquid flow from the other levels.

Drawings

PСR Sampler	Bottom section of PСR	Center section of PСR	Top section of PСR

Stationary partitioned samplers PСRP drawing

Sampler PСRP	Bottom section of PСRP	Center section of PСRP	Top section of PСRP

They can be used in climatic category N and NF, placement category 1.

The number of sections, weight and length depend on the tank capacity.

Stationary three-level decreased sampler PSRT

The PSR-T sampler is a stationary decreased three-level device that provide point sampling from three levels. The model range is represented by the following modifications:

• PSRT-1 for tanks without pontoon
• PSRPT-1 for tanks with steel, aluminum or block pontoon
• PSRT-1D for double wall tanks without pontoon
• PSRPT-1D for double wall tanks with a pontoon
• PSRT-1TK - with a thermal chamber for high-viscosity oil products sampling

PSRT allows to sample at three different oil level, regardless of the volume due to its design, consisting of one or two knee sections (depending on the height), the upper part of which is attached to the float or pontoon, and the lower - to the wall of the tank or the pontoon support . The liquid is taken from a distance of at least 2.5 сm from the bottom and the top filling level and in the center. The nozzle with a back valve on each pipe allows tubes cleaning and purging.

Installation diagram	Criteria	PSRT-1	PSRPT-1
	Filling level, m	10.5	11.5; 17.5
	Tank diameter, m	15.2	10.4...45.6
	Intake pipe diameter, mm	7	15
	Outlet cock diameter, mm	15	15
	Diameter of outlet cock nozzle, mm	140	140
	Section length
	bottom	1.25Н	0.625Н
	top	-	0.625Н
	Shell heigh Н, m	up to 20	up to 20
	Ambient temperature, °С	-50...+60	-50...+60
	Mounting flange	flange I-125-16 st 20 GOST 12820-80
	Overall dimensions in parts, mm, max
	length L	4100	5800
	width В	950	540
	height Н	700	220
	Overall dimensions in place, mm, max
	length L	1050	11500
	width В	12000	540
	height Н	1300	250
	Weight, kg, max	50	100

Samplers PSPR, PSPRP, PSPRPS

Stationary samplers PSPR (PSPRP, PSPRPS) are used for layer-by-layer sampling and can be operated under high pressure. Sampling is carried out in the selected pipeline after the petroleum products unloading. The sample is gathered in the receiving container through the drain tube.

Scheme of sampler PSPRP	Criteria	Value
		for VST (vertical steel tank)-2000	for VST (vertical steel tank)-5000
	Diameter nominal of sample pipes, mm	10	10
	Fluid viscosity, S, max	4	4
	Fluid temperature, °С	–50 … +95
	Oil level, mm, max	10000	11000
	Overall dimensions, mm, max	14000×2700×1200	15000×2700×1200
	Weight, kg, max	780

Float samplers PP

Their peculiarity is the possibility of both point and composite sampling from three different levels. Each sample goes through an intake pipe, a intake valve and a storage container to the outlet cock. Sampling takes place after pumping-over the supernatant oil in the intake pipe, which guarantees the loss free sampling and purity of samples.

We supply various modifications of float samplers:

• PPP samplers for tanks with floating roof or pontoon
• PPD samplers for double wall tanks

Sampling is carried out evenly: the upper sample - at a distance of 250 mm from the oil level, the lower - at a distance of 250 mm from the bottom, the middle - in the middle. It is also possible to set up sampling at heights specified by the operator.

Sample draining may occur by gravity flow or be forced.

Cleaning of intake tubes can be performed without tank emptying due to the intake safety shutdown device.

It is possible to operate floating samples PPP/PPD in cold climates, for what a heating system of external elements is provided.

Scheme of Float sampler PP	Criteria	PP	PPD
	Diameter nominal, mm	15; 25
	Sample volume in 1 m of sampling column, l, max	0.3
	Time of samling, min, max	10
	Fluid viscosity, S, max	1,1
	Fluid temperature, °С	from -40 to +80
	Hydrostatic pressure, MPa, max	0.25
	Shell height, m, max	18
	Connection sizes, мм (WхHхL)	2450х17235х780	2700х12000х780
	Weight, kg, max	340	360

Portable sampler PPN

They are used for truck or railway tanks, horizontal tanks and other vessels with a depth up to 3.5 m. They are made of stainless steel, which makes no bliz from wall friction. The principle of action is in pulling down a cord to the set depth, filling the body with liquid, closing the fluoroplastic plug and lifting the device.

The length of the cord, depending on the modification is from 3.5 m to 10 m. The volume of the metal body varies from 0.15 l to 1 l.

Stationary sampler PSR oT of an organ type

Stationary partitioned samplers PSR OT of an organ type allow to take a point sample at different levels, and the integrated one, which is mixed in the mixing tank for subsequent analysis. Structurally, they appear as several columns that take samples with a difference of 1 m from each other in height. It is also possible to customize the heights. Cleanliness is guaranteed by gathering the operating medium in a separate column.

The Saratov Reservoir Plant supplies vertical tanks with the following modifications of samplers PSR OT of an organ type:

• PSRp OT for tanks with a pontoon or floating roof
• PSR OTd for double-walled tanks
• PSR OTm for viscous oil

Sampler PSR Ot scheme	Criteria	Value
	Diameter nominal, mm	15
	Time of samling, min, max	10
	Fluid viscosity, S, max	1.1
	Fluid temperature, °С	from -40 to +80
	Hydrostatic pressure, MPa, max	0.16
	Shell height, m, max	17.88
	Overall dimensions, mm, max: (WхHхL)	1160х16760х1150
	Weight, kg, max	516