Government of India

Bhabha Atomic Research Centre

Reactor Safety Division

Engineering Hall no. 7, Trombay, Mumbai – 400 085

Ref: RSD/RSS/SKG/MF/2020/54135 Date: March 17, 2020

To,

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Subject: Notice inviting tender for fabrication of Full CT specimens of Carbon Steel (CS)

from the supplied carbon steel pipes as per the given drawings.

Sealed quotations are invited by Head, Reactor Safety Division, Bhabha Atomic Research

Centre, for and on behalf of President of India for minor fabrication job of fabrication of CT

specimens as per the requirements given below:

A) Scope of work: Fabrication of Full CT specimens as listed below:

SN Specimen to be fabricated (ref. Figure) Material Quantity (nos.)

1 Full CT specimens of notch size 20 mm, fig. 1 Carbon Steel 20

(15 in LC and 5

in CL)*

2 Full CT specimens of notch size 22.5 mm, fig. 2 Carbon Steel 65

(55 in LC and

10 in CL)*

3 Full CT specimens of notch size 25 mm, fig.3 Carbon Steel 75

(60 in LC and

15 in CL)*

* For LC and CL see the figure no. 4.

Note to the bidder:

1. Scope of the activity: The minor fabrication work of above specimens (items 1 to 3) involves

cutting of blocks from the pipe, machining them into required dimensions of the specimen’s

size as specified in respective drawings with appropriate finishing operations. The free issue

material (FIM) for fabrication of these specimens, (items 1 to 3) will be provided by RSD,

BARC in form of pipe as mentioned below. The bidder shall collect the FIM from Engineering

Hall-7, BARC. The fabricated specimens shall be delivered at Engineering Hall-7, BARC. All

the specimens must satisfy the acceptance criterion as specified.

2. Fabrication Drawing: Specimen drawings are provided in Fig.1 to Fig.3.

3. Utmost care should be taken while drilling the hole of the specified dimension with the

tolerance (𝑅−0.05+0.05). The burrs left after drilling on the edges should be removed during finishing

without affecting the straightness of the hole surface.

4. All dimensions shown in above mentioned drawings are in mm.

5. Tolerances are only provided where required as per the specified drawing.

6. Notch root radius must be 0.1 mm or less.

7. Material of construction: Following material will be issued as Free Issue Material for the

fabrication of specimens:

SN Material Form: Pipe

1 Low C- Mn Steel (SA 333, Grade 6) OD = 610 mm, Thickness = 39 mm, or

equivalent pipe, Sufficient length

The balance quantity of free issue material, left behind after the fabrication, shall be returned

back and a certificate to that effect should be obtained from the Engineer-in-charge.

8. Specimens are required for material testing, hence any kind of heat treatment is not

permissible. Therefore, cutting of blocks from raw material should be done by wire cut

EDM/ water jet machining or milling cutting instead of gas cutting. Bidder should indicate

the machining process, which will be used for cutting of pipe specimens. The bidder should

specify and proceed only after discussion if any other processes are envisaged.

9. Specimens should be fabricated using CNC wire cutting, and required surface finish, as

specified in the drawings, must be obtained in strict compliance with the specifications. Any

deviation from the specifications will lead to rejection of the specimen.

10. To avoid the rusting/ corrosion of specimens, bidder should apply the mineral oil on the

specimens and same should be delivered with proper packing (separately with some

identification number on box for each specimen). Identification number should be marked on

all specimens (on both thickness sides).

B) Acceptance criterion

The bidder needs to submit the inspection report for each specimen, detailing the

dimensions actual achieved in machining against the required dimensions (as per

drawing), from an independent agency. Failure to meet these geometric requirements would

lead to rejection of the specimen.

C) Terms and conditions:

1. Bidder shall quote the price for fabrication separately for each kind of specimen.

2. The bidder shall specify the delivery period. The delivery can be made in two stages.

(Total delivery period not exceeding 90 days after the issuing of free issue material

mentioned above). Fifty percent delivery of the specimen should be done in the 1st stage