Sui Northern Gas Pipelines Limited
DOC. #: CSL-SD-01
DISTRIBUTION PROCEDURE
Revision. # 00
Issue Date:
INSTALLATION OF SERVICE LINES
THROUGH SEWERAGE DRAIN
Page 1 of 1
13.11.2023
1.0 Purpose:
The purpose of this document is to provide guidelines for protection of the service lines installed through
sewerage drains.
2.0 Scope:
This document will be applicable to the Service lines installed through sewerage drains in Distribution Regions
against new service lines, Shifting of Service Line against SRP jobs and Maintenance work etc.
3.0 Responsibility
3.1
3.2
3.3
3.4
3.5
Sectional In-charge of respective Region will assess quantum of such service lines while
initiating the Job No. and cost of additional services to be hired through Contractors will be
mentioned in relevant expense head to avoid shortage of budget while execution of work.
Sectional Head will award the work(s) to the Contractors as per prevailing SOP.
Concerned Engineer & Site Supervisor shall be responsible for completion of work as per
guidelines given in this document and Distribution Manual and data will be updated in
CC&B. IT/MIS Department will arrange provision of relevant field/characteristics in Filed
Activity of service line and Concerned Engineer/Supervisor shall ensure relevant data entry.
QA Department will arrange inspection of service line as per their routine program to ensure
implementation of SOP.
The contractor will be responsible for the following at site;
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Concrete mixture (1:2:4) , PVC Pipe & Fittings as per requirement.
Assembly of PVC pipe & Elbow and filling of concrete and curing in
coordination with service line construction team.
Reintatement of damaged drain
4.0 General Guidelines:
4.1
Small Drain/Nalla upto 2 feet width
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Laying of Service Lines (MS & PE) in smaller drains having width upto 2 feet shall
be constructed as per below given 4.1 drawing.
Length of Horizontal protection (concrete filled PVC Pipe including fitting ) shall not
exceed 6” beyond the boundary of drain.
Selection of diameter of protection (PVC pipe & Fittings) will be as per site
requirement i.e. width of drain.
Considering availability of space between drain and boundary wall of house,
protection(morter filled PVC Pipe) will be given as per drawing selecting minimum
diameter to reduce restriction in sewerage water flow.
Damaged portion of drain(if any) will be reinstated as per actual with PCC.
Sui Northern Gas Pipelines Limited
DOC. #: CSL-SD-01
DISTRIBUTION PROCEDURE
Revision. # 00
Issue Date:
INSTALLATION OF SERVICE LINES
THROUGH SEWERAGE DRAIN
Page 1 of 1
13.11.2023
4.1- Service Line laying through small drain
4.2
Large Drain/Nalla 2 feet and above
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Laying of Service Lines (MS & PE) in large drains having width 2 feet and above
shall be constructed as per below 4.2 drawing.
The riser pipe of Service line shall consist of two-part, one part will installed along
outer wall of the Nalla and will be atleast 6” below the ground level as shown in
drawing. Second part will be installed after crossing of Nalla as per drawing and
length of this part preferably will not exceed two feet from top of Inner wall of drain.
Diameter of PVC Pipe & Fittings will be 4” for overhead crossing of large
drain/Nalla.
Considering constraints at site which may restrict laying of service line as per this
document, the concerned Sectional In-charge may approve minor alterations while
ensuring safety/integrity of service line.
It shall be ensured that all concrete has been poured throughout PVC Pipe & Fittings
and this shall be ensured by using suitable vibrator / soft hammering of PVC Pipe
while pouring the concrete.
Damaged portion of drain will be reinstated as per actual with PCC.
Sui Northern Gas Pipelines Limited
DOC. #: CSL-SD-01
DISTRIBUTION PROCEDURE
Revision. # 00
Issue Date:
INSTALLATION OF SERVICE LINES
THROUGH SEWERAGE DRAIN
Page 1 of 1
13.11.2023
4.2- Service Line laying through large drain
5. Specifications of material and applicable rates
5.1 Specifications of Material
5.2 Applicable Rates
Summary of prevailing applicable rates of 4” PVC Pipe & Fittings obtained from the Regions is
attached as Annex-A, which may be revised alongwith schedule rates periodically.