11The Heating Treatment Manual of P91 After Welding
-
Upload
akshay-singh -
Category
Documents
-
view
132 -
download
2
Transcript of 11The Heating Treatment Manual of P91 After Welding
RPSCL ROSA POWER SUPPLY COMPANY LIMITEDLUCKNOW, UTTAR PRADESH
2 x 300 MW - Stage - I
Rosa Thermal Power Project
Rosa, Shahjahanpur (U.P.)
DOCUMENT TITLE:
The heating treatment manual of P91 after welding
DOCUMENT NO: 28/X-TEPC-HJZ011-2008
UEEPL
Utility Energytech and Engineers Pvt. Ltd.
Ground Floor, H-146/147
Sector-63
Noida – 201 307
Uttar Pradesh
DEVELOPMENT CONSULTANTS PRIVATE
LIMITED CONSULTING ENGINEERS
24B, PARK STREET, KOLKATA - 700 016, INDIA
TPSC (INDIA) PRIVATE LIMITED
A-1 Module, D-Quadrant, 2nd Floor
Cyber Towers, Hi-Tec City, Hyderabad-81
Shanghai Electric Group Co. Ltd.
No. 8 , Xingyi Road.
Shanghai
China - 200336
Tianjin Electric Power Construction Company
The 26th floor, Harbor Centre ,No. 240
Zhangzizhong Road, Heping district, Tianjin
P.R.China p.c:300041
The heating treatment
manual of P91 after
welding
2×300 MW Rosa
Thermal Power Project
DOCUMENT CONTROL SHEET
PROJECT : 2×300 MW ROSA THERMAL POWER PROJECT
CLIENT : ROSA POWER SUPPLY COMPANY LIMITED
DOCUMENT TITLE :THE HEATING TREAMENT MANUAL OF P91 AFTER
WELDING
DOCUMENT NO. : 28/X-TEPC-HJZ011-2008
REV. NO. :
ENDORSEMENTS :
0
Rev
NoDate Description
Initials Sgn. Initials Sgn. Initials Sgn. Initials Sgn.
Prepared by Reviewed by Approved byIssue
Authorization
DOCUMENT NO. : 28/X-TEPC-HJZ011-2008 Page 1 of 14
The heating treatment
manual of P91 after
welding
2×300 MW Rosa
Thermal Power Project
CONTENTS
1.Work preparation:................................................................................................................3
1.1 Drawings and equipment instruction:...............................................................................3
1.2 main T & P and inspection instruments:...........................................................................3
1.3 the construction conditions...............................................................................................3
1.4 safety proceeding..............................................................................................................3
2. working procedure and methods.........................................................................................5
2.1 Construction art flow........................................................................................................5
3. Appendix...........................................................................................................................12
1.Work preparation:
1.1 Drawings and equipment instruction:
1.1.1 Drawing instruction
Drawing for main steam pipe
1.1.2 Equipment instruction and work quantity: main steam pipe ID368.3*41.275,
DOCUMENT NO. : 28/X-TEPC-HJZ011-2008 Page 2 of 14
The heating treatment
manual of P91 after
welding
2×300 MW Rosa
Thermal Power Project
ID273.05*30, ID368.3*47.04, HP bypass steam pipeφ241.3*27, material is SA335-P91.
1.2 main T & P and inspection instruments:
1.2.1 Main T & P and inspection instruments
SN. Description Model Num. Remarks
1
Heating treatment
temperature control
carbine
DLWK-12-360 2 PCS Acceptance
2 Crawler heater 60 SETS Acceptance
3 Line type heater 30m 10 pieces Acceptance
4 Infrared thermometer TI120EL 1 block Acceptance
5Leeb’s hardness
testerHT-2000A 1 block Acceptance
6 Thermocouple K type 6 pieces Acceptance
1.3 the construction conditions
1.3.1 the power shall be arranged and ensured that during heating treatment, the
power could not be cut off.
1.3.2 The operator shall have the certification.
1.4 safety proceeding
1.4.1 On the heating treatment area, the protection and alarm board shall be hanged.
1.4.2 There shall have two men on duty during electrical heating. Before remove the
heating device, ensure the power has been cut off. After the heating treatment, check
the site, leaving without the fire hidden danger.
1.4.3 Helmet and safety belt shall be worn correctly during working.
1.4.4 The scaffolds shall be fastened with adequate light.
DOCUMENT NO. : 28/X-TEPC-HJZ011-2008 Page 3 of 14
The heating treatment
manual of P91 after
welding
2×300 MW Rosa
Thermal Power Project
2. working procedure and methods
2.1 Construction art flow
DOCUMENT NO. : 28/X-TEPC-HJZ011-2008 Page 4 of 14
Operator shall have the certification
Receive the commission from construction team
The heating treatment
manual of P91 after
welding
2×300 MW Rosa
Thermal Power Project
DOCUMENT NO. : 28/X-TEPC-HJZ011-2008 Page 5 of 14
Check whether there has the work condition
Bind up the heater
Pre-heating
Heating treatment after welding
Hardness checking
Report
Data hand overwelding
The heating treatment manual of P91
after welding
2×300 MW Rosa Thermal Power
Project
Heating treatment construction methods
SN. Description Note Content and methods
Requirements Results
Witness Checking index
Quality standard
Checking instruments
and methods
Checking results
1
Operator shall have the certification
Heating operator shall have the certification as per the IBR requirements.
IBR Acceptance R
2
Receive the commission from construction team
The written commission shall be given to heating technician, and shall be signature by heating technician.
Legible Handwriting
R
3
Check whether the conditions have been prepared
The heating technician shall confirm the working conditions after receiving the commission, the technician shall contract the construction team immediately if the working conditions could not be met the requirements.
The scoffed shall be fastened
W
4Bind up the heater
The welding joint on the commission list shall be bound up, the cover area shall
The relative specialty T & P
23R
DOCUMENT NO. : 28/X-TEPC-HJZ011-2008 Page 6 of 14
The heating treatment manual of P91
after welding
2×300 MW Rosa Thermal Power
Project
be met the heating requirements during using crawler heater and line type heater. In any heating condition, the heater could not be cross and overlapped. And the material could not touch heating wire. The heater shall be close to the pipe without kink and uneven, the insulation material on heater shall be intact. From the center of welding joints, the heating width shall be not less than 3 times of the thickness of pipe wall and shall the minimum heating width is 60mm. if the outer diameter is more than 219mm or the thickness of pipe wall more than or equal to 20mm, the heating width shall be 3 times more than the thickness of pipe wall and meanwhile, the
DOCUMENT NO. : 28/X-TEPC-HJZ011-2008 Page 7 of 14
The heating treatment manual of P91
after welding
2×300 MW Rosa Thermal Power
Project
minimum heating width is 100mm.According to the temperature difference and conduction, it can be divided into two parts, from top to under part, from thin part to thick part with tightness and fastness bound up. For example: for Y-connection, on the straight pipe, the insulation was thin and short, on the leveling pipe, from top to under part, the thickness of the wall was increased. (Thin and thick is comparative)
5 Pre-heating
The temperature increasing speed = 250×25 ÷ wall
thickness ( ℃ /h ) , and
also, the temperature shall not be exceeded 300 /h. Before℃ welding, the pre-heating
“The heating treatment code for fire power plant”
DL/T 819-
R
DOCUMENT NO. : 28/X-TEPC-HJZ011-2008 Page 8 of 14
The heating treatment manual of P91
after welding
2×300 MW Rosa Thermal Power
Project
temperature is 100 - 150℃
before back welding, and the temperature between wall shall less than 300 , the pre-℃
heating temperature is 200-
300 while SMAW, and the℃ temperature between wall shall l less than 300 , and℃ the heating technician shall monitor in time, if the temperature between wall is more than 300 , and welder℃ shall stop welding till the
temperature down to 200 -
300 .℃During heating, the K type armoured thermo-couple as the temperature control element to monitor the temperature. While temperature reach to the pre-
2002
DOCUMENT NO. : 28/X-TEPC-HJZ011-2008 Page 9 of 14
The heating treatment manual of P91
after welding
2×300 MW Rosa Thermal Power
Project
heating temperature, the infrared thermometer shall be applied to measure the temperature of groove root, if it reaches to the pre-heating temperature, welding started, if not, the thermo insulation shall be adopted till the temperature reaches to the pre-heating temperature. 2pc thermo-couples and vertical pipe type (2G) thermo-couples were arranged at two side of groove. And leveling pipe type (5G) thermo-couple was arranged as per the photo 1. And between thermo-coupler and heater, there shall have the heating insulation device.
DOCUMENT NO. : 28/X-TEPC-HJZ011-2008 Page 10 of 14
The heating treatment manual of P91
after welding
2×300 MW Rosa Thermal Power
Project
6Heating treatment
Before heating treatment, check the appearance quality of welding joints, and then the welding joints shall be subjected to the heating treatment after acceptance.
After welding, while the temperature become 100-200 of welding seam, the℃ stabilize the temperature for 1 hour, and then improve the
temperature to 750 - 770℃
as the speed of 140 /h, and℃ then stabilize the temperature for 4 hours, and then low down the temperature to 300 as the speed of℃ 140 /h, after this, the℃ welding seam become cold on the nature condition without control.During heating treatment, the thermo-couple is moved to the
“The heating treatment code for fire power plant”DL/T 819-2002
R
DOCUMENT NO. : 28/X-TEPC-HJZ011-2008 Page 11 of 14
The heating treatment manual of P91
after welding
2×300 MW Rosa Thermal Power
Project
center of welding seam, and the arrangement method is the same as pre-heating.For the heating treatmen tcurve, please refer to appendix 3.
7Hardness checking
The welding seam shall be subjected to the 100% hardness test during heating treatment, after the treatment, the hardness of welding seam shall be not more than HB hardness of original material +100, and less than HB350. If the test result was not confirmed to the requirement, the heating treatment shall be redone.
R
8 ReportAfter the hardness accepted, the report shall be issued.
R
DOCUMENT NO. : 28/X-TEPC-HJZ011-2008 Page 12 of 14
The heating treatment manual of P91
after welding
2×300 MW Rosa Thermal Power
Project
9Data handover
Tidy up the heating treatment curve and hardness report etc.
R
R: Record the point (PETRON done)
W: witness (PETRON and REL)
H: Stop working to inspect (PETRON, REL and SEC)
3. Appendix
Appendix 1: The binding up method for straight pipe
DOCUMENT NO. : 28/X-TEPC-HJZ011-2008 Page 13 of 14
The heating treatment manual of P91
after welding
2×300 MW Rosa Thermal Power
Project
3-5 倍壁厚宽度: The width is 3-5 times of wall thickness
绳状加热器: Rope type heater
履带式加热器: Crawler type heater
DOCUMENT NO. : 28/X-TEPC-HJZ011-2008 Page 14 of 14
The heating treatment manual of P91
after welding
2×300 MW Rosa Thermal Power
Project
加热器中心线: Heater center line
焊缝中心线: Seam center line
Appendix 2: The binding up method for “T” type pipe
3-5 倍壁厚宽度: The width is 3-5 times of wall thickness
DOCUMENT NO. : 28/X-TEPC-HJZ011-2008 Page 15 of 14
The heating treatment manual of P91
after welding
2×300 MW Rosa Thermal Power
Project
NOTE: A) For A, the heating area shall be 3-5 times than welding seam thickness, and the insulation material shall be covered the
whole area.
B) For B, the heater 3 shall be used crawler heat, and for the other, any heater can be applied, and the insulation materials
shall be covered on the whole welding seam and other place affected by the heater.
Appendix 3: heating treatment curve
DOCUMENT NO. : 28/X-TEPC-HJZ011-2008 Page 16 of 14
The heating treatment manual of P91
after welding
2×300 MW Rosa Thermal Power
Project
DOCUMENT NO. : 28/X-TEPC-HJZ011-2008 Page 17 of 14