NP refers to Non Pressure pipes. They do not have a pressure rating and are suitable for conveying a liquid only by gravity (ex: irrigation, culverts, water drainage etc) or telephone/TV/electrical cable protection.

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NP2 Class RCC Hume Pipes manufactured by Srinivasa Pipe Industries
3/13/2011 01:29:32 pm

If you wish to succeed, you should use persistence as your good friend, experience as your reference, prudence as your brother and hope as your sentry.

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Anand
4/6/2011 09:10:51 pm

what is NP4
NP= what sir

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Siben
3/23/2012 03:06:22 pm

Non Pressure

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Anand
11/30/2012 07:48:59 pm

NP 4 refers to thickness of pipe and itcan withstand more durability

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dipti singh
12/17/2012 09:05:28 pm

N P= Non Pressure

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j pattojoshi
2/27/2013 02:53:36 pm

do u know whether collars r neccessary for NP 2 hume pipes? collars r cemented rings for pip[e joints.what is the length of the NP 2 hume pipes.

M.Kondalreddy
6/18/2011 02:09:44 pm

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Rajesh Katkar
2/21/2014 03:23:59 pm

NP2 pipe length is 2.5m.

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sandeep
9/16/2011 07:44:41 pm

what is gred NP2, NP3 NP4
NP FULL FOM > N.....P....
WHAT IS RECIPI
LIKE THAT ,,CEMENT ? BAG/ KG, MATEL ETC. ?

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Subhas Chandra Rathi
6/21/2015 12:55:01 pm

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Arun katiyar
8/26/2015 05:08:38 pm

I know that what is the thickness of NP-4 Hume pipe

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sumit Kumar Mishra
11/17/2015 04:16:13 am

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sanjay chaudhury
10/3/2011 11:51:59 pm

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Dilip Pal
10/21/2011 09:19:03 pm

NP3 Hume Pipe, 3 stands for what?

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BHUSHAN
11/17/2011 05:18:39 pm


dear sir,
quotation for pipes np2,np3,np4 all dia
thanks

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Siben
3/23/2012 03:09:52 pm

Basic Difference between NP2, NP3 & NP 4 is due to quality
of product. Thichness is not main difference , NP 2 is
used for normal flow and condition, NP 3 & NP 4 is used for
heavy work for durability also prefer higher class

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pankaj dubey
7/7/2012 05:26:42 pm

Whats np1 np2 np3 np4 Thikh & Steel

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7/17/2012 05:28:40 pm

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dishant
8/25/2012 04:11:45 am

how can we know that this one is NP1,NP2,NP3,NP4...???

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Subhas Chandra Rathi
6/21/2015 01:48:29 pm

Quantity of reinforced with details

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ramesh chandra nayak
12/18/2012 04:48:39 pm

in NP designated by number that is 1,2,3,4 then what stands for those number clarify

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3/26/2013 04:16:55 pm

what is the difference between P & NP

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Prabhu K T
1/7/2014 03:33:48 pm

what is max load it can withstand (earthembankment)

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pankaj chourasiya
3/3/2014 12:03:56 am

sir what is the full form of NP ?

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SWAMI SINGH
12/17/2015 09:44:44 pm

Q. How will cheak hume pipe np1 or no2 or np3 or np4

& give definition about 1 , 2 , 3 , 4 ?

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3/31/2016 07:17:37 pm

,I need thr details of thickness, and howmany kgs reinforcement required which gr cement used that details i want pl clarify

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sendilcoumar
6/13/2016 11:07:57 pm

for 1000 mm dia NP3 pipe wall thick=115 mm,OD 1230mm ,sockek OD1330mm ,length 2500 mm,2445 kgs pipe weight,133.6 kgs steel weight

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M VIJAYA KUMAR
8/4/2016 04:51:43 am

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12/2/2016 04:52:12 pm

How to choose np2 and Np3 pipes selected

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RAGHUBIR
12/27/2016 08:02:55 am

what is the rate 12inch bore
pipe

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A.S. RAJPUT
1/30/2017 04:07:41 am

Dear Sir ,
What is the using depth for any dia RCC NP- 3 and NP-4 class of pipes for sewer laying.

Reply
4/12/2017 03:38:30 am

TECHNICAL PARTICULARS OF R.C.C. HUME PIPES
This Specification covers the requirements for Non-Pressure
Reinforced Precast Concrete
Pipes (Spun) used for culverts, sewers, irrigation etc.

The Concrete Pipes shall be conforming to IS: 458/2003
(Fourth Revision) with up-to-date
amendment with regards to Design /Dimensions / Tolerances /
Workmanship & Finish /
Materials used for making the Pipes. The Pipes shall be
manufactured by spinning process.

The ends of the concrete pipes shall be suitable for flush
joints or collar joints or suitable
for Socket & Spigot, roll on joints or confined gasket
joints as per the requirements of the
purchaser.

The Pipes shall be of the following Sizes & Classification:
Schedule- 1: Reinforced Concrete, Light duty, Non-pressure
Pipes, Class: NP2, with ends of
the pipes suitable for collar joints conforming to IS:
458/2003 (Fourth Revision)
with up-to-date amendment
Nominal Diameter of Pipes in mm.
80, 100, 150. 200, 225, 250, 300, 350, 400, 450, 500, 600,
700, 800, 900, 1000,
1100, 1200, 1400, 1600 & 1800.

1. Dimensions, Design and Strength requirements of
Reinforced Concrete Pipes of Class NP2
shall be as per the Table 2 of IS: 458/2003(Fourth
Revision), with up-to-date amendment.

2. Tenderers may also quote rates separately for the
Collars. Dimensions and Design
requirements of Reinforced Concrete Collars for Pipes of
Class NP2 shall be as per the Table
21 of IS: 458/2003, with up-to-date amendment.

Schedule- 2: Reinforced Concrete, Light duty, Non-pressure
Pipes, Class: NP2, with ends of
the pipes suitable for Socket & Spigot, roll on joints or
confined gasket joints
conforming to IS:458/2003 (Fourth Revision) with up-to-date
amendment along
with Rubber Ring conforming to Type 2 of IS: 5382/1985 with
up-to-date
amendment.

Nominal Diameter of Pipes in mm.
80, 100, 150. 200, 225, 250, 300, 350, 400, 450, 500, 600,
700, 800, 900, 1000,
1100,1200, 1400, 1600 & 1800.

1. Dimensions, Design and Strength requirements of
Reinforced Concrete Pipes of Class NP2
shall be as per the Table 2 of IS: 458/2003(Fourth
Revision) with up-to-date amendment.

2. Spigot & Socket dimensions of NP2 Class Pipes shall be
as per Table 13 of
IS: 458/2003(Fourth Revision) with up-to-date amendment.

3. Rubber Ring chords used in the Pipe joints shall conform
to Type 2 of IS: 5382/1985 with
up-to-date amendment.

Schedule- 3: Reinforced Concrete, Medium duty, Non-pressure
Pipes, Class: NP3, with ends
of the pipes suitable for flush joints conforming to IS:
458/2003 (Fourth Revision)
with up-to-date amendment.

Nominal Diameter of Pipes in mm.
80, 100, 150. 200, 225, 250, 300, 350, 400, 450, 500, 600,
700, 800, 900, 1000,
1100, 1200, 1400, 1600 & 1800.

1. Dimensions, Design and Strength requirements of
Reinforced Concrete Pipes of Class NP3
shall be as per the Table 3 of IS: 458/2003(Fourth
Revision) with up-to-date amendment.

Schedule- 4: Reinforced Concrete, Medium duty, Non-pressure
Pipes, Class: NP3, with ends
of the pipes suitable for Socket & Spigot, roll on joints
or confined gasket joints
conforming to IS:458/2003 (Fourth Revision) with up-to-date
amendment along
with Rubber Ring conforming to Type 2 of IS: 5382/1985 with
up-to-date
amendment.

Nominal Diameter of Pipes in mm.
80, 100, 150. 200, 225, 250, 300, 350, 400, 450, 500, 600,
700, 800, 900, 1000,
1100, 1200, 1400, 1600 & 1800.

1. Dimensions, Design and Strength requirements of
Reinforced Concrete Pipes of Class NP3
shall be as per the Table 3 of IS: 458/2003(Fourth
Revision) with up-to-date amendment

2. Spigot & Socket dimensions of NP3 Class Pipes shall be
as per Table 14 & Table 17 of IS:
458/2003 (Fourth Revision) with up-to-date amendment.

3. Rubber Ring chords used in the Pipe joints shall conform
to Type 2 of IS: 5382/1985
with up-to-date amendment.

Schedule- 5: Reinforced Concrete, Heavy duty, Non-pressure
Pipes, Class: NP4, with ends of
the pipes suitable for flush joints conforming to IS:
458/2003 (Fourth Revision)
with up-to-date amendment.

Nominal Diameter of Pipes in mm.
80, 100, 150. 200, 225, 250, 300, 350, 400, 450, 500, 600,
700, 800, 900, 1000,
1100, 1200, 1400, 1600 & 1800.

1. Dimensions, Design and Strength requirements of
Reinforced Concrete Pipes of Class NP4
shall be as per the Table 6 of IS: 458/2003 (Fourth
Revision) with up-to-date amendment.

Schedule- 6: Reinforced Concrete, Heavy duty, Non-pressure
Pipes, Class: NP4, with ends of
the pipes suitable for Socket & Spigot, roll on joints or
confined gasket joints
conforming to IS:458/2003 (Fourth Revision) with up-to-date
amendment along
with Rubber Ring conforming to Type 2 of IS: 5382/1985 with
up-to-date
amendment.

Nominal Diameter of Pipes in mm.
80, 100, 150. 200, 225, 250, 300, 350, 400, 450, 500, 600,
700, 800, 900,
1000,1100,1200, 1400, 1600 & 1800.
1. Dimensions, Design and Strength requirements of
Reinforced Concrete Pipes of Class NP4
shall be as per the Table 6 of IS: 458/2003(Fourth
Revisio

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