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GB/T 20801.2-2006 (GBT 20801.2-2006)

Chinese standards (related to): 'GB/T 20801.2-2006'
Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)See DetailStatusGoogle Book
GB/T 20801.1-2020English125 Add to Cart 0--3 minutes. Auto immediate delivery. Pressure piping code -- Industrial piping -- Part 1: General GB/T 20801.1-2020 Valid GBT 20801.1-2020
GB/T 20801.2-2020English1000 Add to Cart 0--3 minutes. Auto immediate delivery. Pressure piping code -- Industrial piping -- Part 2: Materials GB/T 20801.2-2020 Valid GBT 20801.2-2020
GB/T 20801.1-2006English70 Add to Cart 0--3 minutes. Auto immediate delivery. Pressure piping code -- Industrial piping -- Part 1: General GB/T 20801.1-2006 Obsolete GBT 20801.1-2006
GB/T 20801.2-2006English150 Add to Cart 0--3 minutes. Auto immediate delivery. Pressure piping code -- Industrial piping -- Part 2: Materials GB/T 20801.2-2006 Obsolete GBT 20801.2-2006


   
BASIC DATA
Standard ID GB/T 20801.2-2006 (GB/T20801.2-2006)
Description (Translated English) Pressure piping code. Industrial piping. Part 2: Materials [Quasi-Official / Academic version - scanned PDF, translated by Standard Committee / Research Institute in China]
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard J74
Classification of International Standard 23.040
Word Count Estimation 69,643
Date of Issue 2006-12-30
Date of Implementation 2007-06-01
Quoted Standard GB 150; GB/T 229-1994; GB/T 700-2006; GB 713-1997; GB/T 1220-1992; GB/T 1348-1988; GB/T 2054-2005; GB/T 2882-2005; GB/T 3077-1999; GB 3087-1999; GB/T 3091-2001; GB/T 3098.1-2000; GB/T 3098.6-2000; GB 3531-1996; GB/T 3621-1994; GB/T 3624 - 1995; GB/T 3880.2-2006; GB/T 4237-1992; GB/T 4437.1-2000; GB 5310-1995; GB 6479-2000; GB/T 6614-1994; GB 6654-1990; GB/T 6893 - 2000; GB/T 8163-1999; GB/T 9439-1988; GB/T 9440-1988; GB/T 9711.1-1997; GB 9948-2006; GB/T 12229-2005; GB/T 12230-2005; GB/T 12459-2005; GB/T 12771-2000; GB/T 12778-1991; GB/T 13401-2005; GB/T 14976-2002; GB/T 16253-1996; GB/T 16598-1996; GB/T 18984-2003; GB/T 20801.1-2006; GB/T 20801.3-2006; HG/T 3651-1999; HG/T 20537.3-1992; HG/T 20537.4-1992; JB 4726-2000; JB 4727-2000; JB 4738-2000; JB 4741-2000,
Drafting Organization National Chemical Equipment Design Technology Center
Administrative Organization National Standardization Technical Committee Boiler and Pressure Vessel
Regulation (derived from) China National Standard Approval Announcement 2006 No.13 (Total No.100)
Proposing organization National Standard Committee on Boiler and Pressure Vessel Pressure Pipeline Subcommittee (SAC/TC 262/SC 3)
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of PRC, China National Standardization Administration Committee
Summary This standard specifies the basic requirements for pressure pipeline construction materials. These basic requirements include material selection, use restrictions, prescribed inspection requirements and marking area.


GB/T 20801.2-2006: PDF in English (GBT 20801.2-2006)
ICS 23.040
J74
National Standard of the People's Republic of China
Pressure Piping Code-Industrial Piping
Part 2. Materials
ISSUED ON. DECEMBER 30, 2006
IMPLEMENTED ON. JUNE 1, 2007
Issued by General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China
Standardization Administration of the People's Republic of China
Contents
Scope . 1
2 Normative References . 1
3 Terminologies and Definition .. 3
4 General Rules .. 4
4.1 Selection of Materials .. 4
4.2 Material Brand and Allowable Stress .. 4
5 Basic Rules for Material Selection . 4
6 Limits of Material Application . 5
6.1 Ductile Iron, Grey Cast Iron and Malleable Cast Iron .. 5
6.2 Structural Steels . 6
6.3 Pipes and Fittings .. 6
6.4 Carbon Steel and Cr-Mo Alloy Steel... 6
6.5 Austenitic Stainless Steel... 7
6.6 Aluminum and Aluminum Alloy . 7
6. 7 Low-Melting Metal... 7
7 Materials Application Limits at High Temperature .. 8
7.1 Upper Temperature Limit to Material Application .. 8
7 .2 Principles for Selection of High Temperature Materials .. 8
8 Limitation to Material Used at Low Temperature . 9
8.1 Lowest Application Temperature and Impact Test Exemption .. 9
8.2 Impact Test .. 13
9 Material Identification and Quality Certificate . 16
9 .1 Material Identification .. 16
9.2 Quality Certificate . 16
Appendix A (Normative Appendix) Material Brand and Allowable Stress .. 18
Appendix B (Informative Appendix) Physical Properties of Materials . 55
Pressure Piping Code-Industrial Pipelines
Part 2. Materials
1 Scope
This part specifies basic requirements for pressure pipeline construction materials, which
include rules for material selection, application limits, inspection requirements and identification.
2 Normative References
Clauses contained in the following documents are referred by this part of GB/T 20801
and become clauses of this part. Any reference document with date indicated and their
subsequent modification sheets (excluding error corrections) or revised editions do not apply
to this part, however, all parties who enter into an agreement based on this part are
encouraged to probe into possibility of use of the latest editions of such documents. For any
reference document without date indicated, their latest editions are applicable to this part.
GB 150 Steel Pressure Vessels
GB/T 229-1994 Method for Metal Charpy Notch Impact Test (eqv ISO 148.1983)
GB/T 700-2006 Structural Carbon Steel
GB 713-1997 Boiler-Used Steel Plates (neq ISO 5832-4.1996)
GB/T 1220-1992 Stainless Steel Bars
GB/T 1348-1988 Ductile Iron Castings
GB/T 2054-2005 Nickel and Nickel Alloy Plates
GB/T 2882-2005 Nickel and Nickel Alloy Pipes
GB/T 3077-1999 Structural Alloy Steel
GB/T 3087-1999 Seamless Steel Pipes for Low and Middle Pressures (neq ISO
9329-1. 1989)
GB/T 3091-2001 Welded Steel Pipes for Low Pressure Fluid Transmission (neq ISO
559-1. 1991)
GB/T 3098.1-2000 Mechanical Properties of Fasteners. Bolts, Screws and Studs (idt
ISO 898-1. 1999)
GB/T 3098.6-2000 Mechanical Properties of Fasteners. Stainless Steel Bolts, Screws
and Studs (idt ISO 3506-1.1997)
GB353 l-1996 Low Alloy Steel Plates for Low-Temperature Pressure Vessels
GB/T 3621 -1994 Titanium and Titanium Alloy Plates
GB/T 3624-1995 Titanium and Titanium Alloy Pipes
GB/T 3880.2-2006 Aluminum and Aluminum Alloy Plates for General Industries.
Part 2. Mechanical Properties
GB/T 4237-1992 Hot Rolled Stainless Steel Plates
GB/T 4437.1-2000 Hot Extruded Aluminum and Aluminum Alloy Pipes. Part 1.
Seamless Round Pipes
GB 5310-1995 Seamless Steel Pipes for High-Pressure Boilers
GB 64 79-2000 Seamless Steel Pipes for High-Pressure Chemical Fertilizer Equipment
GB/T 6614-1994 Titanium and Titanium Alloy Castings
GB 6654-1996 Steel Plates for Pressure Vessels
GB/T 6893-2000 Drawn (Rolled) Seamless Aluminum and Aluminum Alloy Pipes
(neq ISO 559.1991)
GB/T 8163-1999 Seamless Steel Pipe for Fluid Transmission (neq ISO 559.1991)
GB/T 9439-1998 Gray Iron Castings
GB/T 9440-1988 Malleable iron castings (neq ISO 5922.1981)
GB/T 9711.1-1997 Technical Specification for Delivery of Steel Pipes for Transmission
oflndustrial Petroleum and Natural Gas. Part 1. Grade A Steel Pipe (eqv ISO 3183-1.1996)
GB 9948-2006 Seamless Steel Pipes for Petroleum Cracking
GB/T 12229-2005 General-Purpose Valves. Technical Specification for Carbon Steel
Castings
GB/T 12230-2005 General-Purpose Valves. Technical Specification for Stainless Steel
Castings
GB/T 12459-2005 Butt-Welded Seamless Steel Pipe Fittings
GB/T 12771-2000 Welded Stainless Steel Pipes for Fluid Transmission
GB/T 12778-1991 Method for Metal Charpy Impact Notch Determination
GB/T 13401-2005 Steel Plate Butt-Welded Pipe Fittings
GB/T 14976-2002 Seamless Stainless Steel Pipes for Fluid Transmission
GB/T 16253-1996 Pressure-Resistant Steel Castings (eqv ISO 4991.1994)
GB/T 16598-1996 Titanium and Titanium Alloy Cakes and Rings
GB/T 18984-2003 Seamless Steel Pipes for Low-Temperature Pipelines
GB/T 20801.1-2006 Pressure Piping Code-Industrial Pipelines. Part 1. General
GB/T 20801. 3 -2006 Pressure Piping Code-Industrial Pipelines. Part 3. Design and
transmit flammable substances.
7 Materials Application Limits at High Temperature
7.1 Upper Temperature Limit to Material Application
a) Upper temperature limits to material application under general conditions are
specified in Table A.1 and Table A.2 of Appendix A;
b) Upper temperature limits to material application shall be determined considering
corrosive media impact.
7.2 Principles for Selection of High Temperature Materials
7.2.1 General Requirements
a) For materials for long-term use at high temperature, effect on material application
reliability due to structure or property changes shall be taken into consideration.
b) For materials for long-term use at temperature higher than creep temperature, excess
deformation, excess displacement, material structure and performance degradation
and bolt stress relaxation due to creepage shall be taken into consideration;
c) For materials used at high temperature, material failure due to chemical corrosion
shall be taken into consideration.
d) For materials reinforced through hear treatment, if used at temperature close to or
higher than drawing temperature for long-term use, material strength factor shall be
taken into consideration.
7.2.2 Application of Carbon Steel and Cr-Mo alloy at High Temperature
a) By considering that carbide may possibly be changed into graphite, carbon steel,
manganese carbon steel and low-temperature nickel steel shall not be used for long
time at temperature higher than 425°C, Mo-C steel shall not be used for long time at
temperature higher than 470°C;
b) In view of potential temper brittleness, if Cr-Mo alloy steel is to be used at 444 °C
,.,550 °C for long time, proper measures shall be taken based on application
experience and Specific working conditions.
7.2.3 Usage of Stainless Steel at High Temperature
a) In view of material brittleness, ferritic stainless steel and martensite stainless steel
shall not be used at temperature higher than 3 7 0 °C;
b) Because of potential cr-phase brittleness caused when Cr-Ni austenitic stainless steel
is used at 540 °C ,.,900 °C for long time, ferrite content in martensite stainless steel
and excess cold deformation shall be controlled during use;
c) Because of 475°C brittleness and cr-phase brittleness, duplex stainless steel shall not
be used at temperature higher than 3 00 °C ;
d) Because of intercrystalline attack of austenitic stainless steel caused at high
temperature (higher than melting points of low-melting metals) by Al, Sb, Bi, Cd,
8.2.2 Impact Test of Welded Joint
a) Impact test of welded joint shall be performed in welding process assessment;
b) Preparation of Test piece, location and number of samples to be taken for impact
test shall conform to specification provided in Table 7;
c) Weld joint impact test of materials listed in Table 4 shall include weld metal and
heat affected area, but weld joint impact test of austenitic stainless steel includes
weld metal only.
8.2.3 Procedure for Impact Test
a) Procedure for impact test shall be in accordance with specifications stated in GB/T
229-1994 and GB/T 12778-1991;
b) Standard impact specimen shall be a Charpy notch impact specimen of 1 Ommx
10mmx55mm;
c) If standard specimen can not be prepared due to limited cross section dimensions, a
small specimen with thickness 7.5 mm or 5.0 mm or 2.5 mm or small specimen as
wide as possible may be used. Notch width of a small-sized specimen shall
generally be not be 80% less than material thickness;
d) Specimen notch shall be cut along thick direction. Three specimen constitute a
group.
8.2.4 Impact Test Temperature
a) Impact test temperature of standard specimen shall be no higher than the lowest
design temperature;
b) Reduction value of impact test temperature of small-sized specimen shall meet
specifica......