This standard includes the dimensional and marking requirements for threads and thread gauges that conform to this standard, thread measurement methods, thread gauge specifications and identification regulations, and instruments and methods for inspecting thread connections for line pipe, round thread casing and tubing, trapezoidal thread casing and straight-connect casing. This standard applies to products produced in accordance with standards such as GB/T 9711.1 and SY/T 6194. The measurement methods for thread taper, pitch, thread height, thread angle and flank angle are applicable to threads with no more than 111/2 threads per 25.4 mm. The listed thread sizes without deviation are only used as a basis for connection design and do not require measurement to determine product acceptance or rejection. GB/T 9253.2-1999 Processing, measurement and inspection of casing, tubing and line pipe threads for the petroleum and natural gas industry GB/T9253.2-1999 Standard download decompression password: www.bzxz.net

CB/T9253.2—1999
This standard is based on the API SPHC5B "Inspection of Pipe, Processing, Measurement and Inspection of Pipe Threads in American Customary Units" (1995, 12th edition), and is equivalent to the standard in terms of technical content and writing format. This standard deletes the parts related to the subject content and scope of application of the standard, including: the bottom page of the standard, special statement, Appendix A "Shipping Instructions for Calibration Gauges", Appendix B "Instructions for API Applicants to Use Marks", Appendix C "Requirements for AP1 Gauge Certification Organizations", Appendix D "API Publications--List, Application for the Right to Use the AP1 Monogram (Including Documents A and B)", as well as 1.4 Meter Conversion and 2.3 Equivalent Standards, and revised the questions and chart formats that do not meet the requirements of national standards. The main difference between this standard and API SPEC 5B is that it is basically in accordance with the provisions of GB/T 1.11993. It is used to explain and annotate. For the convenience of use, the technical standard adds an appendix "Approved by relevant national departments!" to provide detailed information about the current appraisal institutions.
According to the provisions of 4.2.3.2 in GB/T 1.11993 Standard Catalytic Work Guide Unit 1: Standard Drafting and Presentation Planning Part 1: Basic Provisions for Standardization Writing, this standard retains the foreword of the original API standard and adds the "current market" part; according to 5.8.2, this standard adopts all the statutory basic units promulgated by the state. Appendix A of this standard is a reminder.
From the date of implementation, this standard will replace GB/T 925J.2--3253.71988. This standard is issued by the National Stone Method The Technical Committee for Standardization of Equipment and Tools is responsible for the proposal and interpretation. The drafting unit of this standard: China National Petroleum Corporation Oil Pipe Research Institute. Standardization Institute. The main drafters of this standard: Ma Zhaoli, Shang Shengping, Jia Liren, Li Pingquan, Yang Xi. GB/T9253.2-1999
API Foreword
This standard is under the jurisdiction of the API General Materials Standardization Subcommittee. This version includes the content approved by letter voting during 1394. The standard was published in 1939 as Std5Bt Pipe Internal and External Thread Inspection Specifications. The 4th edition was published in 1962. In addition to thread inspection, its content also adds The AP [Standards 5A, 5AC, 5AX and 5I] include the size requirements for the threads and thread gauges of casing, tubing, line pipe and couplings, the measurement operation regulations, gauge specifications and gauge case regulations. S1.d5R 4th edition was renamed as the processing, measurement and inspection specifications for casing, tubing and line pipe threads. Many of them are here. We would like to express our gratitude to the American Iron Company for dedicating its patent for the trapezoidal casing and the Armco Steel Company Armco Division for dedicating its patent for the straight-connected casing to the public.
AF1 Exploration and development publications usually have a bold mark on the back of the page to indicate that the previous version of the material has been modified compared to the previous version. This publication has been completely revised. All chapters and paragraphs have been revised. Users are advised to read the new version carefully. This standard is effective from the date printed on the cover: it shall also be considered as the date of issue. Suggestions for revisions shall be submitted directly to the American Petroleum Institute Exploration and Development Division. Address: 120 T. Strect, NW Ashington. Dc 20 ocs. 1 Scope 1.1 Content National Standard of the People's Republic of China Petroleum and Natural Gas Industry Processing, Measurement and Inspection of Casing, Tubing and Line Pipe Threads Petroleum This standard covers the requirements for the dimensions and marking of threads and thread gauges that meet this standard, thread measurement methods, thread gauge specifications and identification regulations, and instrument methods for inspecting the threads of pipelines, threaded casings and tubing, threaded casings and straight-connected casings. This standard is applicable to products produced in accordance with GB/T 711.1 and SY/T 6191. The measurement methods for thread taper, pitch, thread height, thread angle and flank angle are applicable to threads with no more than 11 threads per 25.4 mm. The listed thread effective dimensions without deviation are only used as the basis for connection design. Individuals shall not be measured to determine whether the product should be modified or rejected. 1.2 Inspection
The vibration inspection is applicable to the inspection before shipment at the manufacturing site, the inspection conducted at any location, the inspection conducted after delivery at the place of delivery, and the inspection conducted by the inspection personnel on behalf of the buyer or the party. The manufacturer may choose other instruments or methods to control production work at will. However, product acceptance can only be determined by the inspection results conducted in accordance with the requirements of this standard. 1.3 Other requirements
For any requirements not listed in this standard, the applicable product standards should be consulted. 2 Reference standards:
2. 1 General
The provisions contained in the following standards have become non-standard through the use of this standard. At the time of publication of this standard, the versions shown are valid. All standards are subject to revision, so each member of this standard should explore the possibility of using the latest version of the following standards. GB/T9711.11097 Petroleum and natural gas industry - Technical delivery conditions for steel for transportation Part 1: Grade A steel (e<:Y150 3183·1:1996)
GB/1774-1999 Natural gas industry - Protection and use of casing and pipe (d15010105:1993 SY/T 51991997 Thread grease for casing, oil pipe and line pipe SY/T61941996 Casing and oil joint
Adoption instructions:
The standards introduced by the department have all been converted into the standards applicable to my country. National Quality and Technical Supervision Bureau T999 0517 approved 199912 01 Anshi
2.2 Luo Qiu
GB/T 9253. 2—1999
The technical requirements of other standards cited in this standard are necessary for the safety and interoperability of the product. 3 Definitions
This standard applies to the following definitions.
3.1 Shall (shal1): used to indicate that the provisions are mandatory. 3.2 Should (should): used to indicate that the provisions are not mandatory but are a good practice. 3.3 May (mmy): used to indicate that the provisions are optional. 3.4 RequiredFor every 25.1m screw station, the limit deviation layer is (1.-)≤the degree of any deviation, and the size is shown in Table 2]. The best design is to allow the full deviation (more than 1") over the entire length. For internal thread, the measurement range of the distance is the length range from the boring hole T surface to the plane of +1 tooth from the center of the grip. 2) In the following case, L is the distance from the center end to the vanishing point plane (located at the maximum outer diameter of the pipe) within the above negative density range: if the distance from the pipe end to the vanishing point plane (located at the center of the outer diameter of the pipe) is within the above negative density range, the deviations listed are applicable to internal and external inspection systems unless otherwise specified. The following specifications are not applicable to pipes with a size less than 1.
GB/T 9253. 2 1999
Pipeline thread size
Column 1, and 13, the remaining dimensions are in um. 4
88.50101.6C
101. $3 114: 30
127. 03 141. 30
152, 10 168.28
203. 20 219.08
254, 00 273.415
304. 80 323. 86
355.66355.60
406.4C 406. 40
257.20457.20
509.00 508.00
Tube end to
Dry kidney surface
Tube end to
Vanishing point
Total length
25, m1
43- 50
See Figure 1.
After machine setting
Joint surface
Joint center
Length
269,772
Neck hole spacing
11. 89 1.33
33. 0 5. 69
13. 76 5. 79
45. 855. 20
62. 71 6. (64
75. 41 12. 48
91. 29 11. 96
103, 99 11, 84
116. 69 12. 50
143. 69 12.82
170. 66 14. 83
221,46 17,20
275. 44 18, 7
326. 24 20.00
358. 00 3R.13
40E. 79 16. 91
455. 59 17. 20
23. 08 510. 39 19. 02
The thread diameter of all specifications of pipes is 62.5tm/m Note
Hand-tight is the basic machine tightening of the joint. See 1,1) L=(14—16. 56) mm, for 11-thread pipe thread, L=23.8G) mm, for 8-thread pipe thread, use instructions:
Complete thread
Minimum length
1 This table has been revised accordingly. Table 6, Table 7, Table 12~Table 9, Table 21~Table 26, Table 32 and 7.1.8 have similar revisions. Reading chain center plane
Bypass plane
GB/T9253-2-1999
Hand limit time
Effective thread length plane
Handle plane
—vanishing point
Corner mark history. Note
"Ge Zeng
Student derivative
For steel grades H, J, K. Specifications 1e.18 and 2C, an equilateral triangle mark of 5.53mm should be made at the distance (L+1.59) Bm from one end:
2 pairs and the exhaustion pattern on the tool, the vanishing chain can be selected. 3 pairs of basic machines are tightened, and the coupling or internal thread scales are advanced to the vanishing point surface. The vanishing angle is applicable to the report part made by multiple knives or knives or the incomplete meal, 1|| tt||TFC1 thread parameter control length is - measured size (actual media effect total head 12.?0mm), not a basic design trace E
Figure 3 casing round thread on the base car size S.
For the convenience of the following reasoning
The dimension trend shown is slightly larger
The diameter is assumed to be 62.5mm/m
Figure 4 sleeve back round thread cloud type
(size 4)
Table 1 casing thread tooth type height gauge small
The part will be in mm Units. See Figure 3. Number of threads
FH·0.866p
Yuan, h,- 0. 626,--0. 178
S.. - $.. = 0. 120 p+c. 051
S-..=h. 120p0. 127
8 teeth/25. 4 mm
+ - 3. 17E
Note: H, points, and n are calculated based on the symmetrical cylindrical thread rather than the symmetrical chain thread formula, including the result deviation for the pitch of 3.175mm, the increment of 62.5mm/ml or less The screw twist is negligible.77
Thread parameters
Chain degree:
c2.3 um/l
Metric diameter deviation
CB/T 9253. 2—1999
Casing thread size limit error:
Every 25. 1 Tm Series diameter deviation
Every 25-4mm
Tooth height:
Tooth angle:
Full length of longitudinal thread:
Distance distance A:
Check the pipe connection box basket specific diameter Q and hole depth... Limit deviation
1 5. 208 nr!
--2. c0o nr.
+:. 132 mr
+$, e nrt
.te. 13* ma
+oom
See 6. 1. 4
1 The maximum deviation of the pitch per -1m is the maximum permissible deviation of the length of the pipe, see Table 21. The maximum permissible deviation of the pitch is the maximum permissible deviation over the entire length of the pipe. For internal threads, the pitch measurement range is the distance from the hole plane to the center of the connection surface: the length range of the pipe surface is 2) in the warehouse, it is qualified: if the distance from the pipe end to the pipe end to the maximum outer diameter is within the positive deviation. If the distance from the pipe end to the head thread plane is within the positive deviation mentioned above. 3] Unless otherwise specified, the listed deviations apply to both internal and external threads. 6
Casing thread size
Except for the above 1, 1 and 13, the dimensions are in mm. See Figure 3, 1
Code specification
Nominal weight
With thread outer diameter
and ferrule)
1h/fr)
Pipe end to effective pipe end to
Big 25. 2 nam Hand-tight surface Thread vanishing point length Total length
9. 50.114. 30 j14. 3G
4% Remaining weight 11.30114.3℃
11.60 187. 0 127.
Remaining weight 127. 01 127.3c
5% Total weight 119.70139.7℃
6 Total weight 168. 28 168. 28
17.00177.80 177,8C
Remaining weight 177.8F177.BD
7%, total weight 193. 68 193.68
For instructions:
After the machine is started
To||tight end to
coupling end
tight face length of the center of the joint
23. 29 4:3.6 50.6 111. 843
39.21 59.44 66.68 111.843
36. t9 56. 26 33. 40 124.54342. 44 62.61 39. 85 124. 54315.62 55.79 73.03 137.243
51. $7 72.11 79. 38 165. 82133. $2 53.419 50, 34 175. 1-531. 97 72. 14 79. 38 175. 34553. 44 75. 3: 32. 55 191.11128.35 | 12. 70
17. 68 116. 38 12, 70
17. 86 129. 38 12. 70
17. 88 129. 38 12. 70
142. 08 12. 70
17.85 170. 96 12. 70
17. 68180. 18 12. 70
17. 88±180. 18 12. 70
18.03196.36 11.003
From Yucha||tt| |小长楼
11 For casing short thread with size smaller than 7%, the values ​​listed in API SPEC 5H 1st edition may be different. This standard is analyzed and compared with the 2nd edition. Revise.
Code specification
Nominal weight
(screw outer diameter
and connection)
GB/T9253.2
Clothing 6)
Effective end chamber of tube end
25. mm Hand surface inspection pattern vanishing point
24. 60 319. 08 210. 05
8 H series 219 . n8 219. 05
9 Quanyinsheng 244.48 244.48
9 series all weight or 244. 48 244. 48
132.75 273.C5 273.05
10% rest weight Plate 273. t 273. 05
10% total weight 273. C5273. 05
114 total weight 298.45 298.45
11 total weight 8.45248.45
13% total weight 339.73339.73| |tt||13 total quantity 339.73739.73
16 total mutual quantity 406.40 406-40
1887. 50 473.08 473.58
20 total mutual quantity 508. 00 E08. 00
20 full postage 508.00508.0K
length total length
after tightening
Yu Duan to
digging monkey porridge
noodles To F
Press the heart of the hoop purple length
47. 00 68. (16 76. 20 216. 51±55, 62 73. 49 85. 72 216. 51455. 62 73. 10 85 . 75 2:1. 91154.91 75. 49 85.72 214. 808
43.74 62. 61 69.83 270. 480
59, 79 81. E6 88. 60 270. 18955 19 81. 66 88. 50 270. 38359. 79 81.66 88. 50 295. 58958 c9 81.e6 88.90 235.783
59. 79 81. 66 88.S 337.164
58 69 31.66 88. 90 337. 058
72. 45 01. 56 101. 59 133. 83472. 49 94. 56 101. 53 17C. 5.472. 41 04. 36 101. 5: 315. 23370, 79 94. 36 101, 59 335. 33329.23
Start pet whole
Dry ritual snail whole Asia
Painting war
221. 46 11. t:0www.bzxz.net
221. 46 11. Cm
18. 01 246. 86 11. Co
18. 11 246. 86 11. cc||tt ||IR.01 275. 43 11. t(:
18. 01 2'b. 43 11. CC
275.43 11. t
18. 01 300, 83 11. CC
18. 11 360, 83 11. CC
1K. 0T 342. 11 11. CC
18. L 342.1I It.to
18. 01 408.78 9.30
18. 01 475.46 9. 30
510.38 9.30
18. 11 510. 38 9. 30| |tt||The taper of the thread diameter of all specifications of pipes is 62.5mm/m. The basic allowance for hand-tightening is shown in Figure 3. 1) L—(L,—29 . 58) m1, for 8-thread round thread, 21 is applicable to couplings of grade P110 below:
for couplings of grade III and above,
1 is applicable to couplings of grade P110 below 155 and K5: Steel Grade Joints, 5> Applicable to 155: 55 and higher steel grades. Table 7 Casing Length Due to Thread Size || tt || Except H 1, 1 and Except for 13, all other dimensions are in rm. See Figure 3:
"Big Wing
114.30 114.30
127.00 127.09
139. 70 125. 73
168.28 168. 29||tt| |177.80 177.89
193. 68 153. 68
8%8 215. 08 210 05
Hand-tightened surface
Pipe end to
Vanishing point
Total length
Machine-tightened coupling end face by box
Pipe end to
Golden Hand Purple
Connection center plane length
Top 65.521
F5.10107. 0h 121.30
.7. 88
116 . 68 12. 70
129, 33 12. 7(
122. 08 12. 70
170,5512.70
180. 1K 11. 00||tt ||196. 36 11. c
82-.4611.to
From the common end
Complete thread
Spot length
Pipe end to
6 % 244.48 214.48
214.4E 214.46
508. c0 508. 60
20 563.00 508.00
GB/T 9253.2... 1999
Table 7 (End)
Tube end to
vanishing point
Total density
1.3, 41120. 65
113. 41 120. 65||tt| |164. 24 [25. 11 133. $5
End face connection after machine tightening
Connection ten center length
102. 54 -26. 11 133. 35||tt ||Drilling case close spacing complete photography effect
246. 86 -1. ot:
16.21 526.28 6.36
18. 11 5JC. 33 5. 34
The thread efficiency of the new right specification pipe is 65.5.111/1. ... ,-(L—28.E8) m,For 8-inch casing, 2) for couplings below 110 steel grade. 9) for couplings of P110 steel grade and above. -) for couplings of TJ55 and K55 steel grade, 3) for couplings of F55 and K55 steel grade and above 31
The first tooth after entering the bottom of the first corner mark, the center plane
basic machine egg: buckle method
.I.1 end coated
25×102#
complete effect
for the minimum machine; left to the first corner mark blood point measurement machine forbidden
lost point plane
and the second corner mark first contact surface
[> specification will be ≤13 pieces for 7. 62
Specification ≥16 if it is 5. 03
Common external control
Basic operation plan, 1: Buckle quantity
Now ≤,4 is 10.5
Specification 3~-13% is: 2.70
Specification ≥16 is 9.53
Use mark
Now the end of the scale
25×610 belt
Stepped sleeve thread is tight three-beat Jiang's original size drawing 5
Explosion thread detail drawing and ruler are not damaged 6, 18
Small length
Thread parameters
iR/T 9253.21999
2.51. H.
non, parallel thread and thread type
t..575±o.0252
way
total multiple&
one medium light evening
cattle diameter area
i,T6R_
c,7:R-0..5
red grid two sex or>62.5mm/m
Figure 5 eccentric sleeve thread type and size
(specification 1～13
student, learning machine thread skin in ten recovery lines auxiliary
blood mark on female> B3. 3mm,m
3.202-0.0
i. t5mm single
1.575±0.02
5 2531
Two-sided trapezoidal casing thread profile and size
(not less than [6?
Table 6 Trapezoidal casing thread size lower limit deviation" each relative diameter deviation......
%.5 certificate m/m (specification 4 average ~13%)
Every 25.=mm length to upper straight light deviation
83.mm/m standard not less than 16)
2, 1 TTIL length diameter deviation
2. 54 & rh
raise standard 8% of
2. 51 1.1
n, 26k -g
Number limit deviation
1. 5c mm
-2. 5c mm
.... 64 mr
1 0. 1* :1 3
-0. (164 mm
Thread parameters
Pipe (within the complete thread length):
Diameter deviation on length of meter
62.5mt=s/1nSpecification 1%-15%)
Every 25. 4 mtl Diameter deviation on length 83.3 mm/mSpecification not less than 16)
Every 26i. 2 tnn Straight deviation on length {within the incomplete thread length):
Diameter deviation on length of meter·
62.5mm/m (Specification 4%~~3 beats)
CB/T 9253. 2 1999
Table S complete)
Every 25. 4 1mrn length diameter deviation....
83.3 mm/m (grid not less than 16)
Every 2i. 4 mm length diameter deviation
Every 25.4mm:
Specification not more than 13%
Specification not less than 16
Tooth type:
Tooth angle:
Total length of external thread 1 Due to the difference in thread type, the effective length is irregular 4
Example angle: On the outside of the threaded pipe and at the joint, the close distance A:
1) The diameter of the bottom diameter surface of the thread (i.e. the small diameter surface); the length at the intersection with the outer edge of the pipe shall not exceed the maximum deviation. Limit deviation
.(58 mml
..0.089 n
I 4. h mms
-1.50 mm
I .11+ nm
-3,038 nim
t639n:rr
±u.051 tt.m
(.076 nm
25+0.026>mm
5.6.1, 4
2) The limit deviation of each 25.4 mm screw thread is the maximum permissible deviation of any 25-4 mm length within the complete thread length. The maximum permissible deviation is the maximum permissible deviation over the entire length of the complete thread. The complete thread length (external thread and internal thread effect) is specified in 5.1.1.3) Unless otherwise specified, the listed limit deviations apply to both internal and external threads. Table 9
Trapezoidal casing thread dimensions
Except for columns 1.4 and 13, all other dimensions are in mm. See Figure 5. 1
4/2111.30:34.71
5127. 00 127. 11
552 139. 70 140. 11
6% 168. 28 168. 68
7177.83178.21
Incomplete
From pipe end to
Clearance point
Total length
Mid-diameter"
51.521CJ.94
56.25 106. 63 176. 632
Machine tightening piece
Tube end to
Hand tightening
Replacement end to
Tube end oxygen
Triangle hand tightening
End face to
Recognition end
Marking close distance boring
Thread minimum
Diameter minimum length
1/2 11.86 31.84
42. 85 100.01
45. 31 103. 15
45. 31 104. 7R
15. 31 109. 34
45. 3: 114. 3
130.56 35.0
143. 26 36.60
171. 43 21. 35
181.36 46.13m
3.202-0.0
i. t5mm single
1.575±0.02
5 2531
Two-shaped casing thread profile and size
(size not less than [6?
Table 6 Trapezoidal casing thread size lower limit deviation" each relative diameter deviation......
%.5 certificate m/m (specification 4 average ~13%)
Every 25.=mm length to upper straight light deviation
83.mm/m standard not less than 16)
2, 1 TTIL length diameter deviation
2. 54 & rh
raised 8% of the standard
2. 51 1.1
n, 26k -g
Numerical limit deviation
1. 5c mm
-2. 5c mm
.... 64 mr
1 0. 1* :1 3
-0. (164 mm
Thread parameters
Pipe (within the complete thread length):
Diameter deviation on meter length
62.5mt=s/1nSpecification 1%-15%)
Diameter deviation on every 25. 4 mtl length 83.3 mm/mSpecification not less than 16)
Every 26i. 2 tnn The diameter deviation on the length is 62.5mm/m (specification 4%~~3 beats) CB/T 9253.2 1999) Table S is complete) Every 25.41mrn The diameter deviation on the length is 83.3 mm/m (dynamic grid is not less than 16) Every 2i.4 mm Diameter deviation in length
Every 25.4mm:
Specification not more than 13%
Specification not less than 16
Tooth type:
Tooth angle:
Total length of external thread 1 Due to the difference in thread type, the effective length is irregular 4
Example angle: On the external thread of the threaded pipe and the joint, the close distance A:
1) The thread bottom diameter surface dimension (i.e. the small diameter surface chain; the chain length at the intersection with the external light of the pipe shall not exceed the maximum code deviation. Limit deviation
.(58 mml
..0. 089 n
I 4. h mms
-1. 50 mm
I . 11+ nm
-3,038 nim
t639n:rr
±u. 051 tt.m
(. 076 nm
25+0.026>mm
5. 6. 1, 4
2) The limit deviation of each 25.4mm thread is the maximum permissible deviation of any 25-4mm length within the complete thread length. The maximum permissible deviation is the maximum permissible deviation over the entire length of the complete thread. The complete thread length (external thread and internal thread effect) is specified in 5.1.1. 3) Unless otherwise specified, the listed limit deviations apply to both internal and external threads. Table 9
Trapezoidal casing thread dimensions
Except for columns 1.4 and 13, the remaining dimensions are in mm. See Figure 5. 1
4/2111.30:34.71
5127. 00 127. 11
552 139. 70 140. 11
6% 168. 28 168. 68
7177.83178.21
Incomplete
From pipe end to
Clearance point
Total length
Mid-diameter"
51.521CJ.94
56.25 106. 63 176. 632
Machine tightening piece
Tube end to
Hand tightening
Replacement end to
Tube end oxygen
Triangle hand tightening
End face to
Recognition end
Marking close distance boring
Thread minimum
Diameter minimum length
1/2 11.86 31.84
42. 85 100.01
45. 31 103. 15
45. 31 104. 7R
15. 31 109. 34
45. 3: 114. 3
130.56 35.0
143. 26 36.60
171. 43 21. 35
181.36 46.13m
3.202-0.0
i. t5mm single
1.575±0.02
5 2531
Two-shaped casing thread profile and size
(size not less than [6?
Table 6 Trapezoidal casing thread size lower limit deviation" each relative diameter deviation......
%.5 certificate m/m (specification 4 average ~13%)
Every 25.=mm length to upper straight light deviation
83.mm/m standard not less than 16)
2, 1 TTIL length diameter deviation
2. 54 & rh
raised 8% of the standard
2. 51 1.1
n, 26k -g
Numerical limit deviation
1. 5c mm
-2. 5c mm
.... 64 mr
1 0. 1* :1 3
-0. (164 mm
Thread parameters
Pipe (within the complete thread length):
Diameter deviation on meter length
62.5mt=s/1nSpecification 1%-15%)
Diameter deviation on every 25. 4 mtl length 83.3 mm/mSpecification not less than 16)
Every 26i. 2 tnn The diameter deviation on the length is 62.5mm/m (specification 4%~~3 beats) CB/T 9253.2 1999) Table S is complete) Every 25.41mrn The diameter deviation on the length is 83.3 mm/m (dynamic grid is not less than 16) Every 2i.4 mm Diameter deviation in length
Every 25.4mm:
Specification not more than 13%
Specification not less than 16
Tooth type:
Tooth angle:
Total length of external thread 1 Due to the difference in thread type, the effective length is irregular 4
Example angle: On the external thread of the threaded pipe and the joint, the close distance A:
1) The thread bottom diameter surface dimension (i.e. the small diameter surface chain; the chain length at the intersection with the external light of the pipe shall not exceed the maximum code deviation. Limit deviation
.(58 mml
..0. 089 n
I 4. h mms
-1. 50 mm
I . 11+ nm
-3,038 nim
t639n:rr
±u. 051 tt.m
(. 076 nm
25+0.026>mm
5. 6. 1, 4
2) The limit deviation of each 25.4mm thread is the maximum permissible deviation of any 25-4mm length within the complete thread length. The maximum permissible deviation is the maximum permissible deviation over the entire length of the complete thread. The complete thread length (external thread and internal thread effect) is specified in 5.1.1. 3) Unless otherwise specified, the listed limit deviations apply to both internal and external threads. Table 9
Trapezoidal casing thread dimensions
Except for columns 1.4 and 13, the remaining dimensions are in mm. See Figure 5. 1
4/2111.30:34.71
5127. 00 127. 11
552 139. 70 140. 11
6% 168. 28 168. 68
7177.83178.21
Incomplete
From pipe end to
Clearance point
Total length
Mid-diameter"
51.521CJ.94
56.25 106. 63 176. 632
Machine tightening piece
Tube end to
Hand tightening
Replacement end to
Tube end oxygen
Triangle hand tightening
End face to
Recognition end
Marking close distance boring
Thread minimum
Diameter minimum length
1/2 11.86 31.84
42. 85 100.01
45. 31 103. 15
45. 31 104. 7R
15. 31 109. 34
45. 3: 114. 3
130.56 35.0
143. 26 36.60
171. 43 21. 35
181.36 46.1321
Incomplete
Pipe end to
Clearance point
Total length
Medium diameter"
51.521CJ.94
56.25 106. 63 176. 632
Machine tightening piece
Pipe end to
Hand tightened
Replacement end to
Pipe end oxygen
Triangular hand tightening
End face to
Recognition end
Marking close distance boring
Thread minimum
Diameter length
1/2 11.86 31.84
42. 85 100.01
45. 31 103. 15
45. 31 104. 7R
15. 31 109. 34
45. 3: 114. 3
130.56 35.0
143. 26 36.60
171. 43 21. 35
181.36 46.1321
Incomplete
Pipe end to
Clearance point
Total length
Medium diameter"
51.521CJ.94
56.25 106. 63 176. 632
Machine tightening piece
Pipe end to
Hand tightened
Replacement end to
Pipe end oxygen
Triangular hand tightening
End face to
Recognition end
Marking close distance boring
Thread minimum
Diameter length
1/2 11.86 31.84
42. 85 100.01
45. 31 103. 15
45. 31 104. 7R
15. 31 109. 34
45. 3: 114. 3
130.56 35.0
143. 26 36.60
171. 43 21. 35
181.36 46.13
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