regarding- thickness range for LTCS piping material for WPS

[Darshan Maheshwari]

Can any body suggest what thickness range is applied for qualifying a WPS (for thickness 7.11mm) for LTCS piping material. Please provide reference also.

 

Regards,

Darshan Maheshwari.

[Raghuram Bathula]

what is your design code?
As per ASME it will be T-2T, however for piping (B31.3) this range can
be used if PTC's are provided for the thickness ranges as specified in
Table 323.3.1, else it will be T to T+6mm

Best regards

On Apr 19, 10:42 am, Darshan Maheshwari <darshan.maheshw...@yahoo.com>
wrote:

[Karthik]

As per ASME Sec.IX QW451.1 thickness of test coupon is 1.5mm to mm means the thickness qualified limit is 1.5mm (Minimum) and 2T(Maximum).

In your case, If you use 7.11mm thickness specimen for PQR then the Thickness Qualified limit will be 1.5mm to 14.22mm.

 

Thanks & Regards,

(Karthik)

Karthikeyan.S

QA/QC Manager

German-Thai Boiler Engineering Cooperation Limited.

Rayong Factory ;

379 Moo.6 Soi 8, Tambol Pananikom,

Nikompattana, Rayong 21180 THAILAND

Tel : +66 38 897 035-9 Ext. 137

Fax : +66 38 897 034

Hand Phone: 0066 892512282

---

From: Raghuram Bathula <raghura...@gmail.com>
To: Materials & Welding <material...@googlegroups.com>
Sent: Thursday, April 19, 2012 3:09 PM
Subject: [MW:14128] Re: regarding- thickness range for LTCS piping material for WPS

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[CHINTUKUMAR GANDHI]

Dear Mr. Darshan,   As per QW-403.6 & QW-403.8 of ASME Sec. IX, if PQR will be done on 6 mm. thk. P -1, G-1 material, your qualified base metal thk. range shall be minimum 6 mm. to max. 12 mm. Kindly check for PWHT- Normalizing.    Thanks & regards,     C. R. GANDHI --- On Thu, 4/19/12, Darshan Maheshwari <darshan.m...@yahoo.com> wrote:

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[sreedhar ch]

ASME Sec IX(QW 403.6) 7.11mm to 14.22mm, With Impact testing.

Minimum Thickness of Base metal qualified is the thickness of test coupon or 16 mm which ever is minimum.

 

Sreedhar

--

[PRAMODH NAIR]

If the consturction code is B31.3, the LTCS materail qualified range is 1/2T to T+6mm.

 

Pramodh

[Don Under Survilliance]

hello darshan

its Ajay here

 

your thickness limit will be 7.11 to 14.22

this is as per ASME sec IX......bcouse for LTCS u have to do the impact test............in dis case ur limit will me in lower side is 7.11 but limited to 2T in higher side........

jus go thorugh ASME sec IX chapter 4 clause no QW-403.6

QW-403.6

The minimum base metal thickness qualified

is the thickness of the test coupon

T or 5⁄8 in. (16 mm),

whichever is less. However, where

T is less than 1⁄4 in.

(6 mm), the minimum thickness qualified is

1⁄2T. This variable

does not apply when a WPS is qualified with a PWHT

above the upper transformation temperature or when an

austenitic or P-No. 10H material is solution annealed after

welding.

On Thu, Apr 19, 2012 at 11:12 AM, Darshan Maheshwari <darshan.m...@yahoo.com> wrote:

--

[Karunakaran Karan]

Dears,
         Good day.I have one doubt about LTCS PQR regarding
temperature limit.Our PQR specimen is 5mm thickness and impact test at
2.5mm thick.In your design temp.is -46 degree.In ASME 31.3 and section
viii says .this 2.5 mm specimen allowed for -27degree.But our client comment is this PQR IS used only
-28 degree only.So explain about the correct thickness of specimen for
impact test at -46 temp.design temp.

Thanks and Regards