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Bls: [MW:6830] Construction Code for Structural Steel (offshore construction)

By Materials & Welding
Dear All,
 
Thank you for your kind info, I'll check in the EN 288-3, sect.8.3.2.1)
 
Regards
Ofazni

Dari: GURDEEPSINGH ARORA <gurdeepsarora@yahoo.com>
Kepada: materials-welding@googlegroups.com
Terkirim: Rab, 1 September, 2010 15:38:21
Judul: Re: [MW:6825] Construction Code for Structural Steel (offshore construction)

Dear
 
NORSK M-101

This standard covers the requirements for fabrication and inspection of offshore steel structures with

SMYS < 500 MPa and with a minimum design temperature down to -14°C. For special application

steels with SMYS up to 690 MPa may be used.
 

6.10 Post weld heat treatment (PWHT)

PWHT shall be required for structural welds in steel quality level I or II, or quality level III with

Re>400MPa, when the nominal thickness (as defined in EN 288-3, section 8.3.2.1) exceeds 50 mm,

unless adequate fracture toughness can be documented in the as welded conditions. For restrained

joints of complicated design, PWHT may be required for smaller thicknesses, independent of steel

quality level.

PWHT shall be carried out in accordance with a procedure which shall include:

• Heating rate.

• Cooling rate.

• Soaking temperature and time.

• Heating facilities.

• Insulation.

• Control devices.

• Recording equipment.

• Configuration of structure to be PWHT or details if local PWHT shall be carried out.

• Number and location of thermocouples to be used during PWHT.

The holding time and temperature shall be as recommended by the steel manufacturer


 
G.S.Arora
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Near Aayna Shopping Complex
Off SG Road Thaltej
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Ph: 91-9725262404


--- On Wed, 1/9/10, sugu puma <pumamy@yahoo.com> wrote:

From: sugu puma <pumamy@yahoo.com>
Subject: Re: [MW:6820] Construction Code for Structural Steel (offshore construction)
To: materials-welding@googlegroups.com
Date: Wednesday, 1 September, 2010, 10:43 AM

Dear sir,
              Post weld heat treatment is compulsory requirement to offshore structures for relief stress concentration, try to review project requirements documents / design engineer,they are requirements from previous offshore structure crack happen in transocean/ensco semi.they normal plate rolling by making tubular for jacket platform
AWS D1.1 refer to post weld heat treatment code and material selection section ,

from,
M.sugu

From: omar fazni <ofazni@yahoo.com>
To: materials-welding@googlegroups.com
Sent: Wed, September 1, 2010 12:45:17 PM
Subject: [MW:6819] Construction Code for Structural Steel (offshore construction)

Dear All,
 
I would like to request information of any construction code that is applicable for offshore construction (structural steel), is there any code that determines PWHT requirements with regards of the material Thickness??.
 
For example, we're going to use a 2" tubular materials for offshore structural construction, is there any construction code saying that it has to be PWHT?? I've been looking in AWS D 1.1 and it stated that there are no requirements, except written in the contract
 
Please correct me if I'm wrong
 
Thank you & Regards
 
Ofazni

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