GB/T 17185-2012 PDF English (GB/T 17185-1997: Older version)
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GB/T 17185-2012: PDF in English (GBT 17185-2012) GB/T 17185-2012
GB
ICS 23.040.60
J 15
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
Replacing GB/T 17185-1997
Steel Flanged Fittings
ISSUED ON. DECEMBER 31, 2012
IMPLEMENTED ON. OCTOBER 01, 2013
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.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Expression method of designation ... 4
4 Dimensions and tolerance ... 5
5 Technical Requirements ... 11
6 Hydraulic Test ... 12
7 Inspection... 13
Foreword
This Standard was drafted according to the rules specified in GB/T 1.1-2009.
This Standard replaces GB/T 17185-1997, "Steel Pipe Fittings for Flanged Joint".
Compared with GB/T 17185-1979, this Standard has the main technical changes as
follows.
- ADJUST the standard structure dimension; DELETE the dimension data of
PN11.0, PN15.0 and PN26.0 according to ASME B16.5.2009;
- REVISE the nominal pressures of PN2.0 and PN5.0 TO Class 150 and Class
300, and ADJUST the specific dimension values such as the distance between
end surfaces of the reducing joint etc.;
- MODIFY the categories and designations of steel flanged fittings;
- ADD the related technical specifications of reducing fittings;
- ADD the materials of steel flanged fittings;
- MODIFY the mark and its contents.
This Standard is modified in relation to flanged fittings in ASME B16.5.2009 "Pipe
Flanges and Flanged Fittings", and the types, dimensions and technical requirements
are basically consistent with those specified in ASME B16.5.2009.
This Standard is proposed by China Machinery Industry Federation.
This Standard is under the jurisdiction of China State Technical Committee for
Standardization of Pipe Fittings (SAC/TC 237).
Drafting organizations of this Standard. China Productivity Center for Machinery, East
China Design Branch of China Petroleum Engineering Construction Corporation,
China Tianchen Engineering Corporation, Jintong Petrochemical Pipe Fittings Co.,
Ltd. (Jiang Yin), Huzhou Jiuli Pipe Fittings Co., Ltd., Yangzhou Pipe Fitting Factory
Co., Ltd.
Main drafters of this Standard. Feng Feng, Liu Hongfu, Liu Jianxin, Yang Lijian, Yao
Minghua, Zhou Jiafeng, Li Junying.
The previous edition of the standard replaced by this standard is as.
- GB/T 17185-1997.
Steel Flanged Fittings
1 Scope
This Standard specifies the category and designation, dimensions and tolerances,
technical requirements, hydrostatic test, inspection mark and package of the
class-designated steel flanged fittings.
This Standard is applicable to the steel flanged fittings with the nominal pressures of
Class 150 and Class 300.
2 Normative references
The following documents are essential to the application of this document. For the
dated documents, only the versions with the dates indicated are applicable to this
document; for the undated documents, only the latest version (including all the
amendments) are applicable to this document.
GB/T 9113-2010 Integral Steel Pipe Flanges
GB/T 9124-2010 Specification for Steel Pipe Flanges
3 Expression method of designation
The categories and designations of steel flanged fittings are as those specified in
Table 1.
Table 1 Categories and Designations of Steel Flanged Fittings
Variety Category Designation
45° elbow Straight F45ES Reducing F45ER
90° elbow
Straight F90ES
Reducing F90ER
Straight long radius F90ELS
Reducing long radius F90ELR
Tee Straight FTS Reducing FTR
Cross Straight FCRS
Table 2 Dimensions of Class 150 Steel Flanged Fittings In mm
Nominal
dimensions
Minimum
wall
thickness
tma
Inner
diameter
Raised face Ring joint face
NPS DN
Distance between the center and joint face
of the elbow, tee and cross A
Distance between the center and joint face
of the long radius elbow B
Distance between the center and joint face
of 45° elbow C
Distance between the long center and joint
face of the lateral tee E
Distance between the short center and
joint face of the lateral tee F
Distance between joint faces of the
reducing joint G
Distance between the center and end of
the elbow, tee and cross A
Distance between the center and end of
the long radius elbow B
Distance between the center to end face of
45° elbow C
Distance between the long center and end
face of the lateral tee E
Distance between the short center and end
face of the lateral tee F
Distance between end faces of a reducing
joint G
1 25 4.0 25 89 127 44 146 44 114 95 133 51 152 51 127
1 1/4 32 4.8 32 95 140 51 159 44 114 102 146 57 165 51 127
1 1/2 40 4.8 38 102 152 57 178 51 114 108 159 64 184 57 127
2 50 5.6 51 114 165 64 203 64 127 121 171 70 210 70 140
2 1/2 65 5.6 64 127 178 76 241 64 140 133 184 83 248 70 153
3 80 5.6 76 140 197 76 254 76 152 146 203 83 260 70 165
4 100 6.4 102 165 229 102 305 76 178 171 235 108 311 83 191
5 125 7.1 127 190 260 114 343 89 203 197 267 121 349 95 216
6 150 7.1 152 203 292 127 368 89 229 210 398 133 375 95 242
8 200 7.9 203 229 356 140 444 114 279 235 362 146 451 121 292
12 300 14.3 305 330 483 203 698 152 356 338 491 211 706 160 372
14 350 15.9 337 381 546 216 787 165 406 389 554 224 795 173 422
16 400 17.5 387 419 610 241 876 190 457 427 618 249 884 198 473
18 450 19.0 432 457 673 254 952 203 483 465 681 262 960 211 499
20 500 20.6 483 495 737 267 1029 216 508 505 746 276 1038 225 527
24 600 23.8 584 572 864 305 1206 254 610 583 875 316 1218 285 632
a The thicknesses are those specified in the standard for the outside diameter and wall thickness of pipe, GB/T 9124-2010, corresponding to STD.
If the user doses not have special ordering requirements, the pipes with such wall thicknesses are to be supplied. The additional wall thicknesses
needed to be added due to the stress, non-round shape and stress concentration generated by the fastening bolt during assembly shall be
determined by the manufacturer.
Partial wall thickness is allowed to be less than the minimum wall thickness provided that the following conditions are met.
- The part with smaller wall thickness is closed within the range of circumference whose diameter does not exceed mdt ;
- The measured thickness ≥ 0.75tm;
- The interval between close circles in which the part with smaller wall thickness locates > 1.75 mdt .
mechanical property and heat treating system shall meet the corresponding standard
provisions specified in Table 2 of GB/T 9124-2010. For other requirements, refer to
those specified in Chapter 3 in GB/T 9124-2010.
5.1.3 All the raw materials of flanged fittings must be provided with the material
manufacturer's quality certification or other copies, and acceptance is carried out for
steels in accordance with the certificate. If necessary, re-inspection shall also be
carried out for steels and only those pass such inspection may be used.
5.2 Surface quality
All the finished fittings surfaces shall be free from defects such as crack, interlayer,
slag inclusion and oxide skin; the casting fittings surfaces shall be free from defects
such as crack, pore, cold shut and sand burning which have no effect on the using.
5.3 Surface treatment
5.3.1 De-rusting shall be carried out for internal and external surfaces of carbon steel
alloy-steel pipe fittings, and antirust paint is coated. As for the casting fittings, shot
peening shall be carried out, if necessary.
5.3.2 Acid cleaning and passivation shall be conducted for fittings made of austenitic
stainless steel.
5.4 Pressure/temperature ratings
The pressure/temperature ratings of steel flanged fittings shall meet the requirements
for flanges in 4.2 of GB/T 9124-2010. If the pressure/temperature rating of flanges for
a reducing fitting differs, it shall be determined by the flange with lowest rating among
them.
5.5 Mark
The 45° straight elbow with the nominal dimension of NPS4 (DN 100), the nominal
pressure of Class 150 and made of WCB is marked as.
F45ES NPS4 (or DN100)-Class150 WCB GB/T 17185-2012
The concentric reducing joint with the nominal dimension of NPS4x2 (DN100x50), the
nominal pressure of Class 300 and made of ZG12Cr2Mo1G is marked as.
FRC NPS4x2 (or DN100x50)-Class300 ZG12Cr2Mo1G GB/T 17185-2012
6 Hydraulic Test
6.1 The hydraulic test shall be conducted for the enclosure of each steel flanged
testing or other inspection items may be added according to the user requirements
and during order. However, the inspection items shall be noted in the contract through
negotiation between the supplier and the purchaser.
As for the finished fittings, other inspection items such as chemical composition,
mechanical performance, hydraulic test and intergranular corrosion test may be
added according to the user requirements and during order. But the inspection items
must be noted in the contract based on the agreement of both the supplier and the
purchaser.
8 Mark
The finished flanged fittings made of steels shall be sprayed ...
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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