tanzania petroleum development corporation (tpdc)

PSSSF Kambarage Tower, 8th Floor, Jakaya Kikwete Road, P. O. Box 1191, Dodoma, Telephone: +255262323519,

Email: [email protected], Website: www.tpdc.co.tz

UNITED REPUBLIC OF TANZANIA MINISTRY OF ENERGY

TANZANIA PETROLEUM DEVELOPMENT CORPORATION (TPDC)

On replying indicate: Ref No. FB.292/369/01/K/145 Date: 27th October, 2021 TO ALL BIDDERS, RE: TENDER NO. PA/031/2020-21/W/23 FOR ENGINEERING, PROCUREMENT

AND CONSTRUCTION CONTRACT FOR CONSTRUCTION, INSTALLATION, TESTING AND COMMISSIONING OF COMPRESSED NATURAL GAS (CNG)

REFUELLING STATION FOR DART BUSES AT UBUNGO DEPOT; DAUGHTER CNG STATIONS AT FERRY FISH MARKET, KIBAHA AND MUHIMBILI.

Sub: Clarification response

TPDC acknowledges receipt of the clarifications on the above mentioned tender and would like to provide responses as per attached matrix. 2. We look forward to your firm participation.

Yours faithfully,

Edwin Riwa

For: MANAGING DIRECTOR



NO. ITB SECTION SUBJECT BIDDER’S REQUEST TPDC RESPONSE

1

19028-DES-

ME-DPL-008

(DAUGHTER

STATION 1 _ 3

REST ROOM)-

REV A

19028-DES-

ME-DPL-009

(DAUGHTER

STATION

2 REST

ROOM)-REV A

Bathroom

Please kindly clarify whether there

is a sanitary ware inside the

bathroom and whether there is a

drainage facility for the bathroom.

Bidders should note that, the detailed

Sanitary ware includes ablutions such as

CV’s and sinks.

The sites have the existing drainage

facilities, bidders will have to undertake all

the pipeline works for the connection from

bathrooms to the existing drainage system

at each specific site. Contractor can refer to

the provided civil drawings.

2

PA/031/2020-

21/W/23

Control

Philosophy

Telecommunicati

on

According to Control Philosophy,

2.1 Mother Station Control

Philosophy, "Through use of

wireless connections (serial link),

signals will be transmitted from the

various daughter station and other

mother station to the centralized

control room located at mother

station 1, enabling an overview of

operations at all mother and

daughter station."

Please kindly clarify the specific

communication mode of wireless

connection (serial link). Please

kindly clarify whether the signals to

be transmitted by the daughter

Refer to Item No. 3 below. It is confirmed

that among the signals to be transmitted by

the daughter stations are instrument data,

CCTV, security alarm system and fire alarm

system.



station are instrument data, CCTV,

security alarm system and fire

alarm system.

3

PA/031/2020-

21/W/23

TENDERING

DOCUMENT

Telecommunicati

on

According to TENDERING

DOCUMENT, 3.7 BATTERY

LIMITS "The meters should be

supplied with pressure regulators,

Pressure Gauges, Safety Valves,

PTZ, electronic volume correctors

and its associated connection

fittings with the ability to transfer the

collected data remotely via

GSM/GPRS/SMS modem. "

Please kindly confirm that the

installation position of the meters

are covered by GSM / GPRS / SMS

signal.

Yes it is confirmed that the installation

position of the meters are covered by GSM

/ GPRS / SMS signal. Also there is network

coverage on the proposed stations.

4

PA/031/2020-

21/W/23

TENDERING

DOCUMENT

Security

The bidder understands that the

security alarm system refers to the

access control system. Bidder

requests Owner to confirm Bidder’s

understanding.

It is confirmed



5

19028-DES-

ME-DPL-005

(MOTHER

STATION 2)

OPTION A

Fence and

pavement in

MS2

Please kindly clarify whether the

fence and concrete pavement for

vehicle in MS2 are in Bidder's

scope of work or in DART Bus

Terminal’s scope of work.

Bidders’ scope of work does not involve the

pavement of the parking area for the

vehicle/ buses. Bidders who have visited

the site on 12th October 2021 for MS2

station witnessed that the whole area of the

depot was fenced and concrete paved.

Thus fences and modification of the

concrete base/ foundation will be applicable

to only areas where CNG project equipment

will be installed.

6

Pressure

Equipment

Data Sheets

(Such as

19028-TPDC-

ME-DAS-002

(Cascade

Storage MS2

Rev C), 19028-

TPDC-ME-

DAS-004

(Compressor

M2 Rev

C),etc.)

Mechanical

As per Pressure Equipment Data

Sheets (Such as 19028-TPDC-ME-

DAS-002 (Cascade Storage MS2

Rev C), 19028-TPDC-ME-DAS-

004 (Compressor M2 Rev C),etc.):

Pressure Equipment shall be

marked CE or ASME U-stamped.

Owner is requested to confirm

ASME U-stamped or CE-PED

marked is mandatory requirement?

if yes, please provide the list of CE

directives as applicable to project.

It is confined that ASME U-stamped or CE-

PED marked is mandatory requirement for

all pressure vessels.

For CE marking, please refer to the

requirements as set out in: Pressure

Equipment Directive 2014/68/EU



7

PA/031/2020-

21/W/23

TENDERING

DOCUMENT

3.12 3.13

Electrical

As per TENDERING DOCUMENT,

the selected 11kV overhead line will

be inspected, connected to the

station’s miniature substation and

recommissioned for use. Bidder

requests Owner to clarify the

location of station’s miniature

substation.

Bidders should refer to the plot layout

designs and detailed drawings of each

station.

Bidder’s may undertake further own site

visits to verify the locations.

8

1）

TENDERING

DOCUMENT -

CONSTRUCTI

ON, TESTING

AND

COMMISSION

ING OF

COMPRESSE

D NATURAL

GAS (CNG)

2）19028-

TPDC-PR-

RPT-001 Rev

0.5 (Basis of

Design)

Cathodic

protection

Bidder notice the cathodic

protection for underground piping is

not mentioned in technical

documents. And there is no

cathodic protection BOQ for

underground piping in SECTION

VIII (BILL OF QUANTITIES) of

TENDERING DOCUMENT.

Bidder understands that the

underground piping do not require

cathodic protection.

Bidder requests Owner to confirm

Bidder’s understanding.

Bidder’s are advised to adhere to SECTION

VI: EMPLOYER’S REQUIREMENTS AND

TECHNICAL SPECIFICATIONS

where under item 3.11 it specified that any

below ground steel infrastructure will

require cathodic protection, which will be

designed according to the actual site soil

resistivity.



9

19028-TPDC-

PR-RPT-005

(Hydraulic

Report);

19028-TPDC-

ME-LST-

002(MS2 Line

List)

Pipeline Material

According to the Hydraulic Report

(19028-TPDC-PR-RPT-005)-

Chapter 2.2.1.2 Table2-3,the value

for the pipeline is HDPE PE100

PN16. However, the MS2 Line List

(19028-TPDC-ME-LST-002)

mentioned that the Material for the

pipeline is HDPE PE100 PN 10

SDR 11. Considering the

requirements of specification 4437,


pipeline material is HDPE PE100

PN 10 SDR 11.



Bidders must note that, the pipeline material

required is HDPE PE100 PN 16 SDR 11.

10

19028-TPDC-

PR-RPT-001

Rev 0.5 (Basis

of Design)

Pipeline Tie-

in(MS2)

According to the Basis of Design

(19028-TPDC-PR-RPT-001)-

Chapter 8.1 CNG Tie-in and

Distribution Lines, for gas supply to

the mother stations, buried HDPE

distribution lines will be used to

supply gas from the existing 12''

HDPE pipeline, using the NNGI

BVS No.15 distribution network.


welding operation for the pipeline

tie-in will be conducted after

shutdown of the NNGI BVS No.15

The tie-in will be made at the existing 12”

HDPE PE 100 SDR 11 where hot tapping

will be required. The Contractor shall

ensure that the supply of natural gas to

downstream customers is not affected

when undertaking hot tapping exercise.



and will not operate under

pressure.

Bidder requests Owner to confirm.

11

19028-TPDC-

PR-RPT-002

(Process

Description):

Design

Drawings （

PID for Mother

Station 2）

Desiccant Dryer

System

According to contractor’s project

experience, desiccant dryer system

is commonly composed of 2 gas

dryers, one is for dehydration, and

the other is for regeneration.

Moreover, upstream coalescing

filters, desiccant dryer system and

upstream coalescing filters will be

combined and supplied as pre-

Dehydration Skid. And there will be

a dehydration regen gas heater for

regeneration.

However, in the drawings, there is

only one desiccant dryer for each

line. Contractor understand that

one combination of upstream

coalescing filters, desiccant dryer

system and upstream coalescing

filters is for dehydration, while the

standby combination is for

regeneration. Both of combinations

will be supplied together as one

pre-Dehydration Skid. And a

dehydration regen gas heater is

added in pre-Dehydration Skid.

The provided desiccant system on the

drawings was indicated as a vendor item,

desiccant dryer system will most likely

consist out of two separate vessels, with a

centralised control panel.

Bidders should take note that, the

combination as referred in this clarification

(i.e the mainstream combination and

standby combination) each stream should

have a complete set of dehydration and

regeneration system.

The indicated lines are for duty/standby

operation. One line will be used to

continuously operate whereas the other

will be used during maintenance activities

of the duty line.

Duty line and standby line will included its

own desiccant drying system (as supplied

by vendor)



Please confirm whether

contractor’s understanding is

correct.

12

PA/031/2020-

21/W/23

TENDERING

DOCUMENT

Telecommunicati

on；

Instrumentation

According to 3.7 BATTERY LIMITS

from TENDERING DOCUMENT

Prepaid smart meter is required for

DS1, and the meters shall be inte

grated with the existing vending sy

stem.

Please Provide the existing vendin

g system information

model, specification, mode of data

transfer. etc.

The following are the details requirement for

meters to integrated with the existing

vending software

1. Supports Windows server 2012 and

above

2. Supports bidirectional data

communication

3. Mode of communication via GPRS

and/or WIFI

4. Compliant to STS standard

IEC62055-41/51

5. Generate customizable reports

6. Capture GIS info

7. Generate tokens

8. Token generation software should

be able to generate an STS token for

a specific meter using a decoder key

without direct communication to the

meter.

9. The meter software should be able to

generate tokens (encrypt) which can

then be used to decode tokens

(decrypt) on existing LAISON LAPIS

meters.



13

PA/031/2020-

21/W/23

TENDERING

DOCUMENT

19028-TPDC-

PR-RPT-005

(Hydraulic

Report)

Piping

According to site survey, all the 48

sets of cooking burners meters

Daughter Station 1 will be installed

in the station rest room.

And refer to the tendering

document and Hydraulic Report ,

Bidder understands that :

All burners are in in the point A (fish

market) which is shown in the

‘’Hydraulic Report Figure 2-3:

Daughter Station 1 HDPE

Distribution Network’’, and the

piping connection from the meters

to the individual stoves is under

bidder’s scope.

For point F and G, PE pipeline is

under bidder’s scope, the

downstream installation is out of

bidder’s scope, the interface is 2m

outside the building of F and G.



CONFIRMED the scope of the assignment

is as given in the SECTION VI:

EMPLOYER’S REQUIREMENTS AND

TECHNICAL SPECIFICATIONS



14

PA/031/2020-

21/W/23

TENDERING

DOCUMENT

Control room

refer to the tendering document 3.5

：This control room will be hosted

in the general office building block,

to be provided by DART.

Bidder consider power distribution

room is also needed for this project.

So bidder consider all the room

needed will be provided by DART,

and only equipment and associated

installation is under bidder’s scope.

Bidders should note that, the control room

will be hosted in the general office building

block which will be provided by DART. The

room also will host the power distribution

boards, severs, etc. The room will not host

gas generators.





15

TPDC’s

Response

For 4th NO.2

clarification

(3D drawing)

3D drawing

Refer to Owner’s response:

Axle side diagram for restroom for

DS1&2&3 should be submitted as

part of the 3D drawings for each

station.

Bidder requests Owner to clarify

drawing types included in the 3D

drawing.

Bidders are advised to adhere to the

requirement of the Tender document where

bidders needs to provide Civil structure

drawings and Architectural drawings for all

stations. Including Architectural 3D

drawings for all equipments layout for all the

sites plus 3D model of design drawings for

each station

Drawing types should be in DWG. as well

as PDF format, drawn using an Autodesk or

other similar drawing software



16

GCC 50.1

Section IV

General

Conditions of

Contract

SCC 18

Section V

Special

Conditions of

Contract

Payment

Schedule

According to GCC 50.1, payment

shall be certified by Project

Manager and be paid by Employer

on monthly basis.

According to SCC 18, payment will

be made as per five (5) milestones,

not monthly payment.

TPDC is requested to clarify which

payment term shall apply.

Payments shall be made based on the

milestones. This has been further modified

and clarified in the previous responses to

the clarifications as follows:

Payment Schedule, Certificates and Terms:

i. First Payment: The amount of

Advance Payment shall be 15% of

Contract price. The Contractor will

be paid Advance Payment after

submission of the Acceptable

Advance Payment Guarantee,

verification of front end engineering

design documents and endorsement

of Approved for Construction (AFC)

documents.

ii. Second Payment: The Contractor

to be paid 30% of Contract price

upon submission of evidence of

order placement and supply

acknowledgement of all equipment.

iii. Third Payment: The Contractor

shall be paid 30% of Contract price

upon satisfactory completion of

Factory Assessment Test (FAT)

witnessed by the Client, Project

Consultant and endorsed and

approved by the recognized third

party inspector; and upon



submission of evidence of the

delivery notice and release for

freight/shipment.

iv. Fourth Payment: The Contractor

shall be paid 20% of Contract price

upon completion of all civil works,

installation, testing and

commissioning works and issuance

of project completion certificate.

v. Fifth Payment: The Contractor shall

be paid 5% of Contract price upon

lapse of defect liability period.

17

SCC 18 & 26

Section V

Special

Conditions of

Contract

Advance

Payment

According to SCC 26, advance

payment (15% of contract price) will

be paid to Contractor without

monthly recovery.

As per bidder’s understanding to

SCC 18, this payment (15% of

contract price) is milestone

payment instead of advance

payment.

TPDC is requested to remove the

requirement of submission of

Payments shall be made based on the

milestones.

Please refer to the response in the Item line

number 16 above.



Advance Payment Bank Guarantee

from SCC 18 & 26.

18

SCC 28

Section V

Special

Conditions of

Contract

Site Hand over

As per GCC 64.1, when the

Certificate of Completion is issued

by the Project Manager, the

Contractor shall handover the site

and the works to the Employer

within time specified in the SCC

As per the description of SCC 28,

Site handover date will be on the

Effective Contract Date.

The Employer is requested to

clarify when the Contractor shall

handover the site and the works to

the Employer.

According to Clause 64 of the GCC States

that: When Certificate of Completion is

issued by the Project Manager, the

Contractor shall handover the site and the

works to the Employer within time specified

in the SCC. It can be clarified that, the

Contractor will handover the site to Client

after a successful commissioning of the

project, where all snag lists will have been

cleared and Certificate of project

completion signed off.

The Bidders should also note that the

Intended Completion date of the Project is

eight (8) months from the Effective Contract

date as stipulated in the Special Conditions

of Contract (SCC) Clause 1.

tanzania petroleum development corporation (tpdc)

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