[MW:2856] material specification

Dear Sir,

Please send me EN 8 material properties and ASTM A 668 Material Properties. (Both chemical & mechanical Properties)

Regards

D.Sriram

Looking for local information? Find it on Yahoo! Local http://in.local.yahoo.com/

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[MW:2854] Re: 17020 Accreditering - Procedure Requirement

Just inform with third party, ask if they have a checklist availeble to do an assessment yourself?
 

---

Date: Fri, 31 Jul 2009 09:45:04 +0300
Subject: [MW:2853] 17020 Accreditering - Procedure Requirement
From: erturgut@gmail.com
To: materials-welding@googlegroups.com

Hello,

My company is trying to have ISO 17020 Accreditering

We are aiming to do 2nd and 3rd party inspections, periodic inspections related with API 650 Tanks, API 1104 Pipelines, AD Merkblatter Pressure Vessels, ASME SEC IX Pressure Vessels and some other like these.

Do we have to prepare Procedures, Methods for all of these standards

Or do procedures and methods are needed for non-standard works

Or do we need methods indeed if standards are enough to get the accreditering

 

Thanks in advance
--
Best Regards,

Erhan Turgut
Metallurgical & Materials Engineer
DVS - IIW / EWF International Welding Engineer
EN 473, 97/23/EC PED – UT LII

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[MW:2853] 17020 Accreditering - Procedure Requirement

Hello,

My company is trying to have ISO 17020 Accreditering

We are aiming to do 2nd and 3rd party inspections, periodic inspections related with API 650 Tanks, API 1104 Pipelines, AD Merkblatter Pressure Vessels, ASME SEC IX Pressure Vessels and some other like these.

Do we have to prepare Procedures, Methods for all of these standards

Or do procedures and methods are needed for non-standard works

Or do we need methods indeed if standards are enough to get the accreditering

 

Thanks in advance
--
Best Regards,

Erhan Turgut
Metallurgical & Materials Engineer
DVS - IIW / EWF International Welding Engineer
EN 473, 97/23/EC PED – UT LII

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[MW:2852] Re: effect of heat treatment on Austentic Steel

Hello Sandeep

Generally ASS are not stress relieved after welding due to the chances of sensitization i.e carbide precipitation in the temperature ranges of 425 - 900 degrees C.
However in certain critical applications for dimensional stability in long service, ASS have to be stress relieved after welding.

We have infact successfully carried out SR of ASS (304LN material)at 400 degreesC and 980 degrees C in certain critical jobs as per client requirement.

Stress relieving at temperatures below 400°C is an acceptable practice but results in only modest stress relief. Stress relieving at 425 to 925°C significantly reduces residual stresses that otherwise might lead to stress corrosion cracking or dimensional instability in service. One hour at 870°C typically relieves about 85% of the residual stresses. However, stress relieving in this temperature range can also precipitate grain boundary carbides, resulting in sensitisation that severely impairs corrosion resistance in many media.
To avoid these effects, it is strongly recommended that a stabilised stainless steel (grade 321 or 347) or an extra-low-carbon type (304L or 316L)or with Nitrogen addition like 304LN be used, particularly when lengthy stress relieving is required.

Full solution treatment (annealing), generally by heating to about 1080°C followed by rapid cooling, removes all residual stresses, but is not a practical treatment for most large or complex fabrications.

Low Temperature Stress Relieving:
When austenitic stainless steels have been cold worked to develop high strength, low temperature stress relieving will increase the proportional limit and yield strength (particularly compressive yield strength). This is a common practice for austenitic stainless steel spring wire. A two hour treatment at 345 to 400°C is normally used; temperatures up to 425°C may be used if resistance to intergranular corrosion is not required for the application. Higher temperatures will reduce strength and sensitise the metal, and generally are not used for stress relieving cold worked products.

Regards

Prem Nautiyal
Godrej, Mumbai.


On Thu, 30 Jul 2009 21:07:01 +0530 wrote
>Can anyone please tell about the effect of effect of heat treatment on
>Austentic Steel?
>
>Regards
>Sandeep kumar
>
>>
>

PREM S NAUTIYAL

CELL : 9820313278
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Thursday, July 30, 2009

[MW:2851] Re: 2849] effect of heat treatment on Austenitic Steel

http://www.bssa.org.uk/topics.php

 

all about stainless steel.

Effect of austenitic stainless steel composition and heat treatment on cold formability

Introduction

Alloying elements that help stabilize the austenitic phase reduce the tendency of the austenitic stainless steels to work harden. Nickel additions have been used traditionally to do this, but nitrogen also has a profound affect on stability of the austenite phase.

Deep drawing compositions

The nickel level was increased in the superseded BS1449 grade 304S16 compared to the 304S15 level (around 8.0%). This enabled the 304S16 grade with around 8.5% nickel to be used for deep drawing applications. Both these grades are covered in BS EN 10088-2 as 1.4301, but the higher nickel variant can be specified as a 'deep drawing' grade. In contrast the higher nickel variants of 316 (1.4435) were developed for improved 'selective' corrosion resistance, originally in pharmaceutical applications, from lower ferrite levels. The 'standard' 316 type (1.4401) with around 11% nickel should be suitable for deep drawing.

The BS1449 grade 305S19 with its 11.0 - 13.0 % nickel range is even more stable when cold worked. One application for this grade is for temper rolled strip for springs where low magnetic permeability is required. BS EN 10088-2 covers this grade as 1.4303. An alternative is the Sandvik strip grade '13RM19' with 6% manganese and 0.25% nitrogen in addition to 7% nickel.

Stretch forming compositions

Stretch forming application grades would normally have 'standard' nickel levels (around 8.0 / 8.2%), but if the sheet is intended for stretch forming the manufacturer / supplier should be informed, as the final heat treatment / process line speed conditions are adjusted to optimize the mechanical properties. The grain size of cold rolled stainless steel sheet is usually fine enough (around ASTM 7-8) to avoid 'orange peel' surface roughening during pressing.

Effect of cold work and heat treatment on the magnetic permeability of austenitic stainless steels

Introduction

Austenitic stainless steels are generally non-magnetic with magnetic permeabilities of around 1.0. Permeabilities above 1.0 are associated with the amount of either ferrite or martensite phases present in the 'austenitic' steel and so depend on:

• cold working and heat treatment conditions

• composition effects

This article discusses the effects of cold working and heat treatment.

Cold working and heat treatment

Cold working of austenitic stainless steels can partially transform austenite to martensite. As martensite is ferromagnetic, cold worked austenitic stainless steels can show a degree of 'pull' towards a magnet. This usually occurs at sharp corners, sheared edges or machined surfaces but can be detected on wrought products such as rods or bars which may have been cold straightened, following the final hot rolling or annealing in the mill.

The degree to which this occurs depends on the compositional effects of austenite stabilising elements. High nickel or nitrogen bearing grades tolerate more cold working before localised increases in permeability are noticed.

These increases in permeability can be reversed by full solution annealing (at temperatures around 1050 / 1120 °C with rapid cooling). This transforms any cold-formed martensite back to austenite, the non-magnetic phase, which is then retained on cooling.

The best austenitic stainless steel types for low permeability applications are those with high austenite stability as these have low permeability in both annealed or cold worked conditions. These include the nitrogen bearing types, 304LN (1.4311) and 316LN (1.4406) or the high nickel types such as 310 (1.4845).

arun

On Thu, Jul 30, 2009 at 7:48 PM, Shahid, Iqbal <Iqbal.Shahid@buthermotech.ca> wrote:

Austenitic steels are referred as non-heattreable in conventional sense i.e. they can't be hardened by transformation hardening mechanism (quench & temper)

The only suitable method to increase strength/ hardness of austenitic grades is cold working.

 

In limited uses a surface treatment such as nitriding can also be tried but at the loss of corrosion resistance, however.

Following heat treatments apply to Austenitic grades:

Solution heat treatment

Stress relieving

Best Regards,

Iqbal 

---

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of sandy kumar
Sent: July 30, 2009 3:49 AM
To: materials-welding@googlegroups.com
Subject: [MW:2849] effect of heat treatment on Austentic Steel

 

Can anyone please tell about the effect of effect of heat treatment on Austentic Steel?

 

Regards

Sandeep kumar

--
ARUNVANI

Whatever happened - happened for good; Whatever is happening - is happening for good; Whatever will happen - will happen for good. Do not worry about the past or the future - live in the present.

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[MW:2850] RE: 2849] effect of heat treatment on Austenitic Steel

Austenitic steels are referred as non-heattreable in conventional sense i.e. they can’t be hardened by transformation hardening mechanism (quench & temper)

The only suitable method to increase strength/ hardness of austenitic grades is cold working.

 

In limited uses a surface treatment such as nitriding can also be tried but at the loss of corrosion resistance, however.

Following heat treatments apply to Austenitic grades:

Solution heat treatment

Stress relieving

Best Regards,

Iqbal 

---

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of sandy kumar
Sent: July 30, 2009 3:49 AM
To: materials-welding@googlegroups.com
Subject: [MW:2849] effect of heat treatment on Austentic Steel

 

Can anyone please tell about the effect of effect of heat treatment on Austentic Steel?

 

Regards

Sandeep kumar

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[MW:2849] effect of heat treatment on Austentic Steel

Can anyone please tell about the effect of effect of heat treatment on Austentic Steel?

 

Regards

Sandeep kumar

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[MW:2848] RE: 2847] Tests required on A350LF2 to use temp. for gas / ambient temperature -(minus)40 Deg C

We should always specify the class also; A350 LF2 Class 1 fittings are factory tested at -45.6 °C, unless otherwise specified for lower temperatures, where as A350 class 2 fittings are recommended for up to -18 °C only.

A350 LF2 Class 1 fitting can be used depending on your design temperature (please check MDMT, and not process/operating temp)

CVN impact testing requirement and energy values shall be as per the design code or contract specifications, whichever is stringent, for e.g. B31.3 refer para 323.2.2.

-----Original Message-----
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Velu
Sent: Thursday, July 30, 2009 8:37 AM
To: Materials & Welding
Cc: gr_velu@yahoo.co.in
Subject: [MW:2847] Tests required on A350LF2 to use temp. for gas / ambient temperature -(minus)40 Deg C

HI,

I would like to know whether material A350LF2 can be used for
process / ambient temperature of -40 to 50 Deg C. If yes, what are the
testing required to be carried out to ensure that the valve and other
fittings perform well for this temperature.

I know LTCS A350LF2 is the right choice but the package supplier is
not able to supply valve body with LTCS A350LF2 and he can only supply
with A350LF2.

Thanks in advance

Velu

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[MW:2847] Tests required on A350LF2 to use temp. for gas / ambient temperature -(minus)40 Deg C

HI,

I would like to know whether material A350LF2 can be used for
process / ambient temperature of -40 to 50 Deg C. If yes, what are the
testing required to be carried out to ensure that the valve and other
fittings perform well for this temperature.

I know LTCS A350LF2 is the right choice but the package supplier is
not able to supply valve body with LTCS A350LF2 and he can only supply
with A350LF2.

Thanks in advance

Velu

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The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
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Wednesday, July 29, 2009

[MW:2845] Re: NACE compliant materail

HI,

     If the H2S increses then heavy corrosion will start , the material used will corrode very fast, maily valves, elbows, fittings... etc. weld joints etc.... The entire system can fail within a year or 6 months ....

On Wed, Jul 29, 2009 at 2:34 PM, Yadav Shiva <luvshiv2002@gmail.com> wrote:

Hi Srini,

               Use material with 18% Cr. for existing facilities, the problem is with client . You just go according to your requirment meets the NACE std. Dont worry about if it exceeds 10% or 20%........ if you wana to become scientest then its your coice.... enjoy.........

 

Y.C.Shiva,

QA/QC Engineer,

Doha Qatar.

On Tue, Jul 28, 2009 at 2:25 PM, Hari Srinivasa Murthy <harimurthy@gmail.com> wrote:

An Oil and Gas exploration gas processing facility has been designed for 3% H2S in the gas (NACE compliant material used in the existing facility). As we cannot predict the behavious of oil wells some times H2S content may increase. 

 

Please putdown your opinions on what could be the various implecations to plant equipment (materials)  if the H2S % raises to 8% or 9%. 

 

Regards

 

Srinivas 

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[MW:2844] Re: NACE compliant materail

Hi Srini,

               Use material with 18% Cr. for existing facilities, the problem is with client . You just go according to your requirment meets the NACE std. Dont worry about if it exceeds 10% or 20%........ if you wana to become scientest then its your coice.... enjoy.........

 

Y.C.Shiva,

QA/QC Engineer,

Doha Qatar.

On Tue, Jul 28, 2009 at 2:25 PM, Hari Srinivasa Murthy <harimurthy@gmail.com> wrote:

An Oil and Gas exploration gas processing facility has been designed for 3% H2S in the gas (NACE compliant material used in the existing facility). As we cannot predict the behavious of oil wells some times H2S content may increase. 

 

Please putdown your opinions on what could be the various implecations to plant equipment (materials)  if the H2S % raises to 8% or 9%. 

 

Regards

 

Srinivas 

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[MW:2846] Bolt Torqueing values

i m working on a project of Bulk Plant.There for underground lines we use RTR(Reinforcement Thermosetting Resins) pipe.and i use Flat Face Flange of RTR.Line Pressure is 150-200 PSI.I use rubber gasket between the Flage Joint.

Also i make spols of CS pipe.There i use RF Flange.

can some one provide me the Table of Torque Values for bolting?

 

Regards,

waqas

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[MW:2843] RE: 2839] Re: AWS-CWI best agency in INDIA

Can you please give the address and contact numbers for IANT ( Institute of Advanced NDT Technology)?

 

 

Regards

 

Chandulal S Vithlani

--------------------------------------------------------------------

Dear Prem,
I suggest you that if you are planning to attend AWS for Overseas job opportunities then please think about CSWIP 3.1 welding Inspector.
main difference : AWS validity - 3 years.
                         CSWIP 3.1 - Validity 5 years
AWS membership compulsory. every year you have to pay.
CSWIP membership not compulsory.
Renewal - AWS = INR 22000/- after three years CSWIP 3.1 = INR 15,000/-

Choice is yours! - CSWIP 3.1 = Tata Projects limited.
and for Preparatory courses IANT ( Institute of Advanced NDT Technology)

Regards,
Nilesh

On Tue, Jul 28, 2009 at 4:33 AM, PREMSHANKARDUTTNAUTIYAL <prem_nautiyal@rediffmail.com> wrote:

Hi Friends

I stay in Mumbai and have prepared for AWS-CWI and want to appear for Course + Exam in the next couple of months. But in India there are 4 AWS approved agencies which conduct this AWS course.I am confused as to which agency i should select as i have to invest a huge amount of money... .

1)Industrial Quality Concepts
Address: IQC Training & Services, Pte, Ltd
Shivani Block -1, Ist Floor
40 East Coast Road
Chennai, India 600041
Telephone: 91-44-42158714/42158715/24451009
Fax Number: 91-44-5215-8715
Email: iqc.in.org@vsnl.com
Contacts: Sundaran Baskaran

2)BETZ Engineering & Technology Zone
Address: 49-Vellalar Street
Near St Thomas Mount Railway Station
Chennai - 600088
INDIA
Tel: 91-44-65364123/22441234
TeleFax: 91-44-22441234
Email: betzzone@vsnl.net
Site: www.betzinternational.com

3)DASH Inspectorate
Address: 3rd Floor,Iswar Krupa Building Near Bank Of India,
Saffron Circle,Fatehgunj,
Baroda-390002,Gujarat,India
Phone: +91 265 2750116, 3017474
Fax: +91 265 2788278
Site: www.dashinspectorate.com

4)Agency: Moody ICL Certifications Limited
Address: #372, Industrial Area Phase I
Panchkula
Haryana
India
PIN 134112
Website: www.moodyint.com

Hence can anyone guide me from their past experience as to which agency is the best. Please give your unbiased opinion..
I have heard from all my colleagues that IQC,chennai is the best and most experienced in conducting CWI.

Please guide me to select the best agency which will provide good preparatory training.

Regards

Prem Nautiyal
Mumbai.

PREM S NAUTIYAL

CELL : 9820313278