CALIBRATION TOWER AND ASSOCIATED FACILITIES

FIXED TYPE PROVER VESSELS

Design Specification

i. Material of Construction: SS 304 (Test certificate to be provided)

ii. Shell & Cone Thickness: Minimum 4 mm for 2KL, Minimum 3 mm for 1KL, 500 Ltrs and

100 ltrs provers (UT certificate/any other certificate specifying the thickness) As per IS

iii. Manhole cover thickness: 8mm

iv. Top flange cover thickness: 8mm

v. Manhole Diameter: 600 mm for 2KL & 1KL, 350 MM For all other. (Feasibility to be

vi. Hydraulic Test pressure: At atmospheric pressure for leak proof (Test certificate to be

provided by third party)

vii. Vessel design: As per IS-2341

viii. Volume Adjustment: 0.5% of Capacity (Leak proof system)

ix. Fittings: Level Indicator, Inlet & Outlet Ball Valves & Air Vent

x. Calibration: Calibration certificates for provers approved by W&M to be provided by

xi. Drawing: Vendor must submit detailed drawing of all vessels and get them approved

before delivery of vessels.

a) The top neck shall be provided with a gauge glass and an overflow pipe with Valve arrangement

to ascertain the correct capacity measure. The gauge glass window shall have a suitably graduated

scale marked on it. The scale shall cover +/- 1% of the capacity mark from the point of full capacity

mark of the measure.

b) The outlet valve shall be so constructed such that the measure is completely emptied.

c) One or two adjusting devices shall be provided on the measure.

d) The device shall be capable of positive adjustment and should be self-locating. It shall be locked

by a lock nut or set screw.

e) It shall have a total range of adjustment equivalent to a quantity & +/-0.5% of the capacity of

f) A manhole or hand hole shall be provided on the body of the measure to enable entry into the

measure for purposes of internal painting and to carry out internal inspection.

a) The measures shall be of fully welded construction, all welds being external and continuous

with good penetration and free from scale.

b) All interior joints shall be smooth and free from projections. Entire welding shall be done only

by Tungsten Inert Gas type as per standard with SS 304 filler material.

a) The finishing operations (Grinding) will be carried out only with media specified for Stainless

b) Measures shall be free from surface defects and indentations.

c) External surface -: Matt finish by buffing

d) Internal surfaces -: Solvent cleaned for free flow of water.

Unloading of vessel

a) Unloading of vessel (Any special equipment needed to unload ex. Crane) and placement at

designated place at location as instructed by BPCL officer shall be in scope of vendor.

b) Packaging, Forwarding and Freight charges are in scope of vendor. (To be delivered at BPCL

Bakania Depot, Bhopal).

Special Terms and Conditions:

1. W & M approved calibration certified for all prover vessels to be provided with the prover

2. Hydro pressure testing certificate of prover vessel from approved authority.

3. Prover vessel Material test certificate from Third party inspector should be provided by vendor.

4. Material delivery and unloading is in vendor’s scope.

5. All the technical specification need to be meet as mentioned above

6. Terms and conditions mentioned in the general terms and conditions are applicable.

Delivery period: Work in all aspects to be completed within 60 days from the date of LOI.

Reference Drawing:

TROLLEY MOUNTED MOBILE TYPE PROVER VESSELS

Design Specification

i. Material of Construction: SS 304 (Test certificate to be provided)

ii. Shell & Cone Thickness: Minimum 4 mm for 2KL, Minimum 3 mm 500 Ltrs (UT

certificate/any other certificate specifying the thickness) As per IS

iii. Manhole cover thickness: 8mm

iv. Top flange cover thickness: 8mm

v. Manhole Diameter: 600 mm for 2KL, 350 MM For 500 L. (Feasibility to be checked)

vi. Hydraulic Test pressure: At atmospheric pressure for leak proof (Test certificate to be

provided by third party)

vii. Vessel design: As per IS-2341

viii. Volume Adjustment: 0.5% of Capacity (Leak proof system)

ix. Fittings: Level Indicator, Inlet & Outlet Ball Valves & Air Vent

x. Calibration: Calibration certificates for provers approved by W&M to be provided by

xi. Drawing: Vendor must submit detailed drawing of all vessels and get them approved

before delivery of vessels.

a) The top neck shall be provided with a gauge glass and an overflow pipe with Valve arrangement

to ascertain the correct capacity measure. The gauge glass window shall have a suitably graduated

scale marked on it. The scale shall cover +/- 1% of the capacity mark from the point of full capacity

mark of the measure.

b) The outlet valve shall be so constructed such that the measure is completely emptied.

c) One or two adjusting devices shall be provided on the measure.

d) The device shall be capable of positive adjustment and should be self-locating. It shall be locked

by a lock nut or set screw.

e) It shall have a total range of adjustment equivalent to a quantity & +/-0.5% of the capacity of

f) A manhole or hand hole shall be provided on the body of the measure to enable entry into the

measure for purposes of internal painting and to carry out internal inspection.

g) Provision of temperature gauges: minimum 3 numbers

h) Provision of level bottles: minimum 1 number

i) Provision of FLP motor (minimum 3 HP) and pump for decantation of product; along with

SS 304 pipelines

j) Provision of fill pipe (dia min 4”) slotted suitably for top loading and shall be provided upto

100 mm from bottom with angular cut of 45 degrees

k) Provision of bottom loading coupler arrangement for filling through bottom loading type

l) Min ½” ball valve for zero drain

m) Min 4 number of level jacks

n) Solid rubber wheels

o) All Structures such us Legs, ladder, base Frame, Railing Guard, shall be Mild steel with

p) Gauge Glass resolution : 0.1% of tank capacity

q) handle arrangement with steering mechanism on trolley for easy movement of the trolley.

r) space for 1 person to stand on trolley

s) ladder on the prover for climbing upto the manhole of the vessel from the trolley platform

a) The measures shall be of fully welded construction, all welds being external and continuous

with good penetration and free from scale.

b) All interior joints shall be smooth and free from projections. Entire welding shall be done only

by Tungsten Inert Gas type as per standard with SS 304 filler material.

a) The finishing operations (Grinding) will be carried out only with media specified for Stainless

b) Measures shall be free from surface defects and indentations.

c) External surface -: Matt finish by buffing

d) Internal surfaces -: Solvent cleaned for free flow of water.

Unloading of vessel

a) Unloading of vessel (Any special equipment needed to unload ex. Crane) and placement at

designated place at location as instructed by BPCL officer shall be in scope of vendor.

b) Packaging, Forwarding and Freight charges are in scope of vendor. (To be delivered at BPCL

Bakania Depot, Bhopal).

Special Terms and Conditions:

1. W & M approved calibration certified for all prover vessels to be provided with the prover

2. Hydro pressure testing certificate of prover vessel from approved authority.

3. Prover vessel Material test certificate from Third party inspector should be provided by vendor.

4. Material delivery and unloading is in vendor’s scope.

5. All the technical specification need to be meet as mentioned above

6. Terms and conditions mentioned in the general terms and conditions are applicable.

Delivery period: Work in all aspects to be completed within 60 days from the date of LOI.

Reference Drawing: