TU 1361-023-00212179-2005
| OKP 136100 | Group B62 I APPROVE Deputy General Director FSUE "TsNIITMASH" A.S. Zubchenko "20" 05 2005 |
SEAMLESS COLD-FORMED PIPES
AND HEAT-DEFORMED FROM STEEL GRADES
08Х14МФ and 08Х14МФ-Ш
Technical conditions
TU 1361-023-00212179-2005
(for the first time)
Holder of the original: FSUE "TsNIITMASH"
Date of introduction: 14.10. 2005
No expiration date
AGREED Chief Engineer of PNTZ OJSC D.V. Markov "28" June 2005 Chief Engineer of JSC "Podolsky" Machine-building plant "Zio-Podolsk" Yu.B. Nikanorov « 20 » 05 2005 Deputy General Director- Executive Director JSC "IK ZiOMAR" V.P. Belousov « 20 » 05 2005 Technical Director - First Deputy Managing Director of JSC SinTZ Yu.V. Bodrov « 20 » 05 2005 Chief Engineer JSC "NTPZ" I.I. Volberg « 20 » 05 2005 APPROVED Deputy Head of the Regulatory Department Federal Nuclear Power Plant Safety environmental services, technological and nuclear supervision letter 06-07/1148 V.A. Grivizirsky "13" 10 2005 |
Head of work V.P. Borisov "15" 06 2005 |
Content
1. Technical requirements 4
1.1 General requirements 4
1.2 Assortment 4
1.3 Dimensions and curvature 6
1.4 Chemical composition 8
1.5 Heat treatment and mechanical properties 8
1.6 Surface requirements 8
1.7 Continuity of metal 9
1.8 Technological properties 11
1.9 Non-metallic inclusions 11
2. Acceptance rules and control methods 12
2.1 General rules 12
2.2 Sampling 12
2.3 Control of dimensions and curvature 13
2.4 Chemical composition 14
2.5 Mechanical properties 14
2.6 Surface 14
2.7 Continuity of metal 15
2.8 Technological tests 15
2.9 Non-metallic inclusions 15
3. Safety requirements 15
4. Marking, packaging, transportation and storage 15
5. Referenced regulatory documents 16
| TU 1361-023-00212179-2005 | ||||||||
| Change | Sheet | Doc. No. | Subp. | Date | ||||
| Developer. | Shchenkova | Seamless cold-formed pipes ated and heat-deformed bathtubs made of steel grades 08Х14МФ and 08Х14МФ-Ш |
Lit. | Sheet | Sheets | |||
| Checked | Mikheeva | 2 | 18 | |||||
| N. counter. | Mitina | |||||||
| Approved. | Mazaev | |||||||
These technical conditions apply to seamless cold-formed and heat-deformed pipes made of steel grades 08Kh14MF and 08Kh14MF-Sh, intended for nuclear (NPP) and thermal (TPP) power engineering and other branches of mechanical engineering.
The technical level indicators established by these technical conditions are provided for increased (A) and normal (B) quality categories.
The pipes are made from a pipe blank supplied according to technical specifications TU 14-1-1529, bored and turned after hot processing.
Examples of symbols:
Cold and heat-deformed pipes (X), category B, normal manufacturing accuracy, outer diameter 16 mm with wall thickness 2 mm, non-dimensional length, made of steel grade 08X14MF:
Pipe BH 16×2 - 08Х14МФ, TU 1361-023-00212179-2005
The same, category A, high manufacturing precision (p) by outer diameter and wall thickness:
Pipe AX 16 p ×2 p - 08X14MF, TU 1361-023-00212179-2005
The same, category A, normal manufacturing accuracy by outer diameter, increased manufacturing accuracy by wall thickness:
Pipe AX 16×2 p - 08X14MF, TU 1361-023-00212179-2005
The same, category A, normal manufacturing accuracy of measured length, made of steel grade 08X14MF-SH:
Pipe AX 16×2×5000 - 08Х14МФ-Ш, TU 1361-023-00212179-2005
The same, category A, high manufacturing precision according to wall thickness of measured length, made of steel grade 08X14MF-SH:
Pipe AX 16×2 p ×5000 - 08Х14МФ-Ш, TU 1361-023-00212179-2005
The same, category B, of normal manufacturing precision of multiple length (k p ) 2000 mm from 08Kh14MF steel:
Pipe BH 16×2×2000 kr - 08Х14МФ, TU 1361-023-00212179-2005
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1. Technical requirements
1.1 General requirements
1.1.1 Pipes in the delivered condition must comply with the requirements of these technical conditions.
1.1.2 Pipes must be supplied in quality categories A and B with mandatory and additional tests in accordance with Table 1. The quality category is specified in the order.
Table 1 - Types of tests by quality categories
| Test characteristics | Types of tests | Quality category | Item number | |
| A | B | |||
| Mandatory tests | Control of chemical composition | 1.4; 2.4 | ||
| Control of pipe sizes | + | + | 1.3.1; 1.3.2; 1.3.3; 1.3.4; 2.3.1; 2.3.2; 2.3.4 | |
| Visual inspection of surface quality | + | + | 1.6; 2.6.1; 2.6.2 | |
| Quality control of the internal surface with an endoscope or periscope | + | + | 2.6.1 | |
| Curvature control | + | - | 1.3.5; 2.3.5 | |
| Hydraulic pressure test | + | + | 1.7.1; 2.7.1 | |
| Ultrasonic testing for detection of longitudinal defects | + | + | 2.7.2 | |
| Control of non-metallic inclusions content | + | + | 1.9.1; 2.9 | |
| Tensile test at room temperature | + | + | 1.5.2; 2.5 | |
| Technological tests | + | + | 1.8; 2.8.1; 2.8.2; 2.8.3 | |
| Additional tests | Tensile test at temperatures of 350 or 400° C with determination of σ t | + | - | 1.5.2; 2.5 |
| Electromagnetic testing for detection of surface and through defects | + | - | 1.7.3; 2.7.3 | |
1.2 Assortment
1.2.1 Pipes shall be supplied according to outside diameter and wall thickness. Pipe dimensions shall correspond to those specified in Table 2.
By agreement between the manufacturer and the customer, pipes of other sizes may be supplied, but within the specified range.
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Table 2 - Dimensions and maximum length of cold-formed and heat-formed pipes
| Outer diameter, mm | Maximum length of measuring pipes, m, with wall thickness, mm | ||||||||||||||||||||||||
| 1.0 | 1,2 | 1.4 | 1.5 | 1.8 | 2.0 | 2,2 | 2.5 | 2.8 | 3.0 | 3.2 | 3.5 | 4.0 | 4.5 | 5.0 | 5.5 | 6.0 | 6.5 | 7.0 | 7.5 | 8.0 | 8.5 | 9.0 | 9.5 | 10 | |
| 6 | 7 | 7 | 7 | 7 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 7 | 7 | 7 | 7 | 7 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 8 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 9 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 10 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 11 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 12 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 13 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 14 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 15 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 16 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 17 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 18 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 19 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 20 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - | - | - | - | - | - | - | - |
| 21 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - | - | - | - | - | - | - | - |
| 22 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - | - | - | - | - | - | - | - |
| 23 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - | - | - | - | - | - | - | - |
| 24 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - | - | - | - | - | - | - | - |
| 25 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - | - | - | - | - | - | - |
| 27 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - | - | - | - | - | - | - |
| 28 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - | - | - | - | - | - | - |
| 30 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - | - | - | - | - |
| 32 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - | - | - | - | - |
| 34 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - | - | - | - | - |
| 35 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - | - | - | - | - |
| 36 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - | - | - | - | - |
| 38 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - | - | - | - |
| 40 | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - | - | - | - |
| 42 | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - | - | - | - |
| 45 | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - | - | - | - |
| 48 | - | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - |
| 50 | - | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - |
| 51 | - | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - |
| 53 | - | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - |
| 54 | - | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - |
| 56 | - | - | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - |
| 57 | - | - | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - |
| 60 | - | - | - | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - |
| 63 | - | - | - | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - |
| 65 | - | - | - | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - |
| 68 | - | - | - | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - |
| 70 | - | - | - | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - |
| 73 | - | - | - | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - |
| 75 | - | - | - | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - |
| 76 | - | - | - | - | - | - | - | - | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - |
| 80 | - | - | - | - | - | - | - | - | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - |
| 83 | - | - | - | - | - | - | - | - | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - |
| 85 | - | - | - | - | - | - | - | - | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - |
| 89 | - | - | - | - | - | - | - | - | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - |
| 90 | - | - | - | - | - | - | - | - | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - |
| 95 | - | - | - | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - |
| 100 | - | - | - | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - |
| 102 | - | - | - | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - |
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continuation of table 2
| Outer diameter, mm | Maximum length of measuring pipes, m, with wall thickness, mm | ||||||||||||||||||||||||
| 1.0 | 1,2 | 1.4 | 1.5 | 1.8 | 2.0 | 2,2 | 2.5 | 2.8 | 3.0 | 3.2 | 3.5 | 4.0 | 4.5 | 5.0 | 5.5 | 6.0 | 6.5 | 7.0 | 7.5 | 8.0 | 8.5 | 9.0 | 9.5 | 10 | |
| 108 | - | - | - | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - |
| 110 | - | - | - | - | - | - | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - |
| 114 | - | - | - | - | - | - | - | - | - | - | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - |
| 120 | - | - | - | - | - | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - |
| 121 | - | - | - | - | - | - | - | - | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - | - | - | - | - |
| 127 | - | - | - | - | - | - | - | - | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - | - | - | - | - |
| 130 | - | - | - | - | - | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 6.5 | 6.5 | - | - | - |
| 133 | - | - | - | - | - | - | - | - | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - | - | - | - | - |
| 140 | - | - | - | - | - | - | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 6.5 | 6.5 | - | - | - |
| 146 | - | - | - | - | - | - | - | - | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - | - | - | - | - |
| 150 | - | - | - | - | - | - | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 6.5 | 6 | 4.5 | 4 |
| 152 | - | - | - | - | - | - | - | - | - | - | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 6.5 | 6 | 4.5 | 4 |
| 159 | - | - | - | - | - | - | - | - | - | 7 | 7 | 7 | 7 | 7 | 7 | 7 | - | - | - | - | - | - | - | - | - |
1.2.2 The theoretical mass of 1 meter of pipes is calculated using formula (1).
M = 
(D n - S) S ρ, kg (1),
where π = 3.14;
D n - nominal outer diameter, mm;
S - nominal wall thickness, mm;
ρ is the density of the metal, equal to 7.8 g/ cm3
1.3 Size and curvature
1.3.1 The following must be supplied along the length of the pipe:
- non-dimensional length from 3.0 to 12.5 m;
- measured length from 3.0 to 7.0 m;
- multiple length within the measured length with an allowance of 5 mm for each cut, minimum multiple length - 300 mm.
By agreement between the contractor and the customer, pipes of measured length exceeding the specified length may be supplied. JSC "PNTZ" manufactures pipes measuring 16x1.4 mm and 16x2.0 mm up to 16 m long.
In each batch of pipes of measured and multiple length, no more than 10% of pipes of non-measured length are allowed, but not shorter than 3.0 m.
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1.3.2 The maximum deviations for the outside diameter and wall thickness must correspond to those given in Tables 3 and 4.
Table 3 - Limit deviations of the outer diameter
| Outer diameter, mm | Limit deviations | |
Normal accuracy, quality category B |
High precision, quality category A | |
| From 6 to 15 | ±0.2 mm | ±0.2 mm |
| From 16 to 30 | ±0.3 mm | ±0.25 mm |
| From 31 to 50 | ±0.45 mm | ±0.4 mm |
| From 51 to 69 | ±1% | ±0.8% |
| From 70 to 145 | ±1.25% | ±1.25% |
| From 146 to 159 inclusive | ±1.25% | ±1.25% |
Table 4 - Limit deviations of wall thickness
| Wall thickness, mm | Limit deviations, % | |
Normal accuracy, quality category B |
High precision, quality category A | |
| From 1 to 2 inclusive | ±15% | ±12.5% |
Over 2 to 5 inclusive for diameters up to and including 50 |
+12.5% / -10% | ±10% |
Over 2 to 5 inclusive for diameters over 50 |
±12.5% | ±10% |
| Over 5 | ±12.5% | ±10% |
1.3.3 The ovality of the pipes should not take the outer diameter of the pipes beyond the permissible deviations, Table 3.
The variation in wall thickness of the pipes should not take the wall thickness of the pipes beyond the permissible deviations, table 4.
1.3.4 Maximum deviations in the length of pipes of measured and multiple lengths must not exceed +15 mm.
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1.3.5 The curvature of pipes in any section 1 m long must not exceed 1.5 mm.
1.3.6 The ends of the pipes must be cut at right angles and cleared of burrs.
1.4 Chemical composition
1.4.1 Pipes are made of steel grades 08X14MF and 08X14MF-SH.
The chemical composition of steel (according to ladle sample) and permissible deviations from the chemical composition must comply with the standards of TU 14-1-1529.
1.5 Heat treatment and mechanical properties
1.5.1 Pipes must be supplied in a heat-treated condition. The type of heat treatment is indicated in the pipe quality document.
1.5.2 The mechanical properties of the pipe metal must correspond to those specified in Table 5.
By agreement with the Customer, when delivering pipes of quality category A, it is permitted to deliver all pipe sizes with a yield strength of no more than 490 N/mm² (50 kgf/mm²), in an amount of no more than 25% of the delivery volume. In this case, the ultimate strength must exceed the yield strength by at least 49.0 N/mm² (5.0 kgf/mm²).
At the customer's request, for quality category A, the yield strength must be determined at one of the temperatures (350 or 400)°C, which is specified in the order.
Table 5 - Mechanical properties of pipe metal
| Quality category | At room temperature, °C | At elevated temperatures, °C | |||
| 350 | 400 | ||||
Tensile strength, σ in , N/ mm2 (kgf/ mm2 ), not less than |
Yield strength, σ t , N/ mm2 (kgf/ mm2 ) |
Relative elongation, δ 5 , %, not less than |
Yield strength, σт, N/mm 2 (kgf/mm 2 ), not less than | ||
| A | 441 (45) | 245-392 (25-40) |
25 | 196 (20) | 176 (18) |
| B | 441 (45) | 245-490 (25-50) |
25 | - | - |
1.6 Surface requirements
1.6.1 Depending on the customer's requirements specified in the order, pipes can be supplied:
- with light-etched outer and inner surfaces;
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- with polished outer and light-etched inner surfaces. In this case, the polished outer surface can be from matte to shiny.
1.6.2 Films, cracks, folds, tears, scale, deep scratches and rough ripples are not allowed on the outer and inner surfaces of pipes of quality category A. Such defects must be completely removed by local gentle cleaning, continuous or local grinding, boring and turning, while the thickness of the pipe wall in the places of defect removal must not exceed the minimum permissible values.
1.6.3 On the outer and inner surfaces of cold-formed and heat-deformed pipes of quality category A, dents from scale or rolling tools, small longitudinal marks without sharp corners, individual scratches, small ripples, traces of cleaning and other small defects caused by the production method may be left without repair, provided that they do not take the wall thickness beyond the minimum tolerances.
The quality of the external and internal surfaces of pipes of quality category A must correspond to the samples of the external appearance and permissible defects of pipes, agreed upon in the established manner.
1.6.4 The surface quality of pipes of quality category B must comply with the requirements of GOST 9941.
1.7 Continuity of metal
1.7.1 Each pipe must withstand, without detecting a leak, a test with internal hydraulic pressure (P) in accordance with the requirements of GOST 3845 at a permissible stress equal to 80% of the yield strength.
The manufacturer guarantees that the pipes supplied by him will withstand the hydraulic pressure test without testing, provided that 100% non-destructive testing is carried out.
1.7.2 Each pipe must be subjected to ultrasonic testing (UT) of the metal continuity to detect longitudinal defects when adjusting the sensitivity of the ultrasonic equipment to artificial reflectors such as marks applied to the outer and inner surfaces of standard samples, for quality category A with a depth of h=(5 ± 0.5)% S, length l= (25 ± 2.5) mm, width m ≤ 1.5 mm; for quality category B with a depth of h=(10 ± 1)% Ѕ, length
l=(25 ± 2.5) mm, width m ≤ 1.5 mm, where Ѕ is the nominal wall thickness.
- To control pipes with a diameter of 10 mm or less with a ratio of D/S≥5, a SOP with a mark depth of (10 ± 1)%S is used.
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- For pipes of any diameter with a ratio D/S<5, it is permitted to carry out testing on process pipes of the closest size that satisfy the ratio D/S≥5 with a mark depth of (10 ± 1)%S for quality category B or (5 ± 0.5)%S for quality category A.
- For pipes with an internal diameter of 5 mm or less, testing is permitted only with an external mark.
- To control pipes with a nominal wall thickness of less than 2 mm, a test strip with a triangular mark of length l=(10 ± 1.0) mm is used.
1.7.3. At the customer's request, each pipe of quality category A must be subjected to electromagnetic (EMC) testing to detect surface and through defects when adjusting the sensitivity of the equipment to artificial reflectors of the "longitudinal rectangular mark" type on the outer and inner surfaces or the "radial through cylindrical hole" type with the dimensions specified in Tables 6 and 7.
Table 6 - Dimensions of artificial risk
dimensions in mm
| Pipe sizes | Dimensions of artificial risk |
Diameter from 6 to 32 inclusive Wall thickness from 1.0 to 4.0 inclusive |
Depth h = (0.2 ± 0.02) Length l = (25 ± 2.5) width m ≤ 1.5 |
Diameter over 32 up to and including 159 Wall thickness over 4.0 up to and including 18 |
Depth h = (5 ± 0.5)%S Length l = (25 ± 2.5) width m ≤ 1.5 |
Table 7 - Diameter of artificial opening
dimensions in mm
| Pipe diameter | Diameter of artificial defect, d |
| Up to 12 mm inclusive | 1.0±0.1 |
| Over 12 up to and including 32 | 1.4±0.1 |
| Over 32 to 50 | 1.8±0.1 |
| From 50 to 127 inclusive | 2.2±0.1 |
| Over 127 up to and including 159 | 2.7±0.1 |
Each SOP (standard sample of the enterprise) with an artificial reflector of the type "radial through cylindrical hole" must have three holes located along the perimeter at 120° and along the length of the standard sample (along the axis of the pipe) at a distance of at least 150 mm between adjacent holes.
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1.8 Technological properties
1.8.1 Pipes must withstand one or more technological tests, which must be specified in the order:
- diameter up to 60 mm - bending tests around a mandrel or expansion tests;
- diameter from 60 to 108 mm - expansion or flattening tests;
- diameter from 108 to 159 mm inclusive - strip flattening or bending tests
1.8.2 Pipes with an outside diameter of up to 108 mm with a wall thickness of no more than 9.0 mm must withstand expansion tests. Expansion tests are carried out using a mandrel with a taper angle of 30° until the outside diameter of the pipes increases by an expansion value of 15%.
1.8.3 Pipes with an outside diameter of up to 60 mm must withstand a test for bending around a mandrel up to an angle of 90°. Pipes with an outside diameter from 108 to 159 mm inclusive with any wall thickness must withstand a test for bending a strip around a mandrel up to an angle of 90°.
1.8.4 Pipes with an outside diameter from 60 to 159 mm inclusive must withstand a flattening test until the distance between the flattening surfaces is H mm, calculated using formula (2):
H = 
, (2),
where S is the nominal wall thickness, mm;
D n - nominal outer diameter, mm;
a is the coefficient of deformation per unit length, equal to 0.09.
1.9 Non-metallic inclusions
1.9.1 The contamination of pipe metal with non-metallic inclusions by the maximum score should not exceed, according to GOST 1778:
-for open-cast steel:
- for sulfides - 4.0 points;
- for oxides and silicates - 5.0 points;
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-for steel produced using electroslag remelting:
- for sulfides - 3.0 points;
- for oxides and silicates - 3.0 points.
Contamination of metal with non-metallic inclusions may not be monitored and may be transferred from the document on the quality of the pipe blank to the document on the quality of the pipes.
2. Acceptance rules and control methods
2.1 General rules
2.1.1 To check the quality of pipes, the manufacturer carries out control and necessary tests, the methods and scope of which are specified in these technical conditions.
The customer has the right to conduct incoming quality control of pipes, applying the acceptance rules, control and testing methods and quality assessment standards specified in these technical conditions.
2.1.2 Pipes are presented for acceptance in batches. A batch must consist of pipes of the same size in diameter and wall thickness, the same steel grade, the same melt, the same heat treatment mode and be accompanied by a quality document in accordance with GOST 10692 with additional information on heat treatment.
The number of pipes in a batch should not exceed 300 pieces.
2.1.3 If unsatisfactory results are obtained for at least one type of test, repeat tests are carried out on a double number of pipes selected from the same batch, excluding pipes that did not pass the tests. The results of the repeat tests are extended to the entire batch.
If unsatisfactory retest results are obtained, pipes of a given batch may be subjected to individual, 100%, control according to the type of test for which unsatisfactory results were obtained, or to repeated heat treatment.
The reprocessed batch is accepted as new.
The number of repeated heat treatments should not exceed 3.
2.2 Sampling
2.2.1 The selection of pipes and samples for control and testing is carried out in accordance with the standards specified in Table 8.
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Table 8 - Standards for selection of pipes and samples for various types of control
| Types of control and testing of pipes | Pipe selection standards | Standard for sampling from a pipe | |
| Group A | Group B | ||
| Styloscopy | 100% | - | |
| Inspection of the outer surface | 100% | - | |
| Inspection of the inner surface | 100% | - | |
Inner surface inspection endoscope or periscope |
5%, but not less than 2 |
- | |
| Outside diameter control | 100% | - | |
| Wall thickness control | 100% | - | |
| Measuring length | 100% | - | |
| Curvature control | 100% | - | |
| Ultrasonic testing | 100% | - | |
Electromagnetic control on detection of surface and through defects |
100% | - | |
| Hydraulic pressure test | 100% | - | |
Tensile test at room temperature temperature |
2% of the lot, but not less than 2 | 1 | |
| Tensile test at 350°C or 400°C | 2% of the batch, but not less than 2 |
1 | |
| Distribution test | 2% of the lot, but not less than 2 | 1 | |
| Bending test | 2% of the lot, but not less than 2 | 1 | |
| Flattening test | 2% of the lot, but not less than 2 | 1 | |
Control of non-metallic content inclusions |
2 pipes from the smelter | 3 | |
2.2.2 When delivering pipes of measured length, samples are taken from the original pipe before cutting into measured lengths, with the test results being extended to each measured length.
2.3 Control of dimensions and curvature
2.3.1 The outer diameter is checked using a smooth micrometer type MK according to GOST 6507, 2nd accuracy class, or a rigid gauge - a clamp according to GOST 18360.
2.3.2 The pipe wall thickness is checked from both ends of the pipe using a pipe micrometer type MT according to GOST 6507, 2nd accuracy class, or using a thickness gauge, GOST 11358, in places where defects are removed.
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2.3.3. When checking the outside diameter and wall thickness, special devices may be used that are no worse in accuracy than those specified in paragraphs 2.3.1 and 2.3.2 and certified in accordance with the established procedure.
2.3.4. The length of the pipes is controlled with a measuring tape according to GOST 7502, 2nd accuracy class.
2.3.5 The curvature of the pipes is measured with a 1000 mm long straightedge type ШД according to GOST 8026 and a feeler gauge according to TU 2-034-225.
2.4. Chemical composition
2.4.1 The chemical composition of the pipe steel is accepted in accordance with the document on the quality of the pipe blank.
In case of disagreement regarding the quality of the metal, the chemical composition is determined according to GOST 12344, GOST 12345, GOST 12346, GOST 12347, GOST 12348, GOST 12350, GOST 12351, GOST 12354, GOST 12364 or other methods that ensure the required accuracy of determination established by the standards. Samples are taken according to GOST 7565 or according to the manufacturer's method.
The only arbitration method for determining the chemical composition of steel is chemical analysis methods according to the mentioned standards.
2.4.2 The pipes are tested with a steeloscope for the presence of alloying elements.
2.5 Mechanical properties
Tensile tests at room temperature are carried out according to GOST 10006, at elevated temperatures (350 or 400)°C - according to GOST 19040. The speed of movement of the movable grip before the yield point is no more than 10 mm/min, after reaching the yield point - no more than 40 mm/min.
2.6 Surface
2.6.1 Inspection of the outer surface of the pipes is carried out visually without the use of magnifying devices. Inspection of the inner surface of the pipes - "with a light bulb" from both sides.
For pipes of quality category A, the internal surface is checked using an endoscope or periscope.
2.6.2 Determination of the type of defect on the outer and inner surfaces is carried out in accordance with OST 14-82.
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2.7 Continuity of metal
2.7.1. Hydraulic testing of pipes is carried out in accordance with GOST 3845, with the pipes being kept under pressure for at least 10 s.
2.7.2. Ultrasonic testing is carried out according to the technological instructions of the manufacturer, developed in accordance with the requirements of GOST 17410 and agreed with FSUE TsNIITMASH.
2.7.3 Electromagnetic testing is carried out according to the technological instructions of the manufacturer, agreed with FSUE TsNIITMASH, GOST 24289.
2.8. Technological tests
2.8.1. Distribution tests are carried out in accordance with GOST 8694.
2.8.2 Bending tests are carried out in accordance with GOST 3728 and GOST 14019. Tests are carried out on samples in the form of a pipe section or a strip.
2.8.3 The flattening test is carried out in accordance with GOST 8695.
If tiny tears or other small defects are found on flattened samples, which are a consequence of the disclosure of permissible external defects caused by the production method, one repeat test of another sample from the same pipe may be carried out, with preliminary removal of the surface outer layer of the sample to a depth of no more than 0.2 mm.
2.9. Non-metallic inclusions
The contamination of metal pipes with non-metallic inclusions is checked according to GOST 1778 using method Ш, option Ш6 over the entire area of sections with longitudinal direction of fibers with an assessment based on the maximum score of six samples.
3. Safety requirements
Seamless steel pipes are explosion-proof, non-toxic, electrically safe and radiation-safe.
4. Marking, packaging, transportation and storage
4.1 Marking, packaging, transportation and storage must comply with the requirements of GOST 10692. When preparing technical documentation, a brief designation of technical conditions TU 1361-023-2005 is allowed.
4.2 If necessary, it is permissible to place several packages of pipes of the same or different sizes in one box, provided that they are separated.
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5. Referenced regulatory documents
| Designation of the document to which references are given | Section number, sub- section, developed my document, in which the link is given | ||||||||
| 1 | 2 | ||||||||
| GOST 1778-70 Steel. Metallographic methods for determining non-metallic inclusions | 1.9.1; 2.9 | ||||||||
| GOST 3728-78 Pipes. Bending test methods | 2.8.2 | ||||||||
| GOST 3845-75 Metal pipes. Hydraulic pressure testing method | 1.7.1; 2.7.1 | ||||||||
| GOST 6507-90 Micrometers. Specifications | 2.3.1; 2.3.2 | ||||||||
| GOST 7502-98 Measuring metal tapes. Specifications | 2.3.4 | ||||||||
| GOST 7565-81 Cast iron, steel and alloys. Method of sampling for determination of chemical composition | 2.4.1 | ||||||||
| GOST 8026-92 Verification rulers. Technical conditions | 2.3.5 | ||||||||
| GOST 8694-75 Pipes. Expansion test method | 2.8.1 | ||||||||
| GOST 8695-75 Pipes. Flattening test method | 2.8.3 | ||||||||
| GOST 9941-81 Seamless cold- and heat-deformed pipes made of corrosion-resistant steel | 2.3.2 | ||||||||
| GOST 10006-80 Metal pipes. Tensile testing method | 2.5 | ||||||||
| GOST 10692-80 Steel, cast iron pipes and connecting parts to them. Acceptance, marking, packaging, transportation and storage | 2.1.2; 4.1 | ||||||||
| GOST 11358-89 Thickness gauges and wall thickness gauges with a division value of 0.01 and 0.1 mm. Technical conditions | 2.3.2 | ||||||||
| GOST 12344-2003 Alloyed and high-alloy steels. Methods for determining carbon | 2.4.1 | ||||||||
| GOST 12345-2001 Alloyed and high-alloy steels. Methods for determining sulfur | 2.4.1 | ||||||||
| GOST 12346-78 Alloyed and high-alloy steels. Methods for determining silicon | 2.4.1 | ||||||||
| GOST 12347-77 Alloyed and high-alloy steels. Methods for determining phosphorus | 2.4.1 | ||||||||
| GOST 12348-78 Alloyed and high-alloy steels. Method for determination of manganese | 2.4.1 | ||||||||
| GOST 12350-78 Alloyed and high-alloy steels. Methods for determining chromium | 2.4.1 | ||||||||
| GOST 12351-2003 Alloyed and high-alloy steels. Methods for determining vanadium | 2.4.1 | ||||||||
| GOST 12354-81 Alloyed and high-alloyed steels. Methods for determining molybdenum | 2.4.1 | ||||||||
| GOST 12364-84 Alloyed and high-alloy steels. Methods for determining cerium | 2.4.1 | ||||||||
| GOST 14019-2003 Metals. Bending test methods | 2.8.2 | ||||||||
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| GOST 17410-78 Non-destructive testing. Seamless cylindrical metal pipes. Ultrasonic flaw detection methods. | 2.7.2 |
| GOST 18360-93 Sheet gauges for diameters from 23 to 260 mm. Dimensions. | 2.3.1 |
| GOST 19040-81 Metal pipes. Methods of tensile testing at elevated temperatures. | 2.5 |
| GOST 24289-80 Non-destructive eddy current testing. Terms and definitions. | 2.7.3 |
| TU 14-1-1529-2003 Rolled and forged tubular blanks for boiler tubes. | 1.4.1 |
| TU 2-034-225-87 Probes. Models 82002, 82105, 82302. | 2.3.5 |
| OST 14-82-82 Industry quality management system for ferrous metallurgy products. Departmental quality control of products. Seamless rolled steel pipes. Surface defects. Terms and definitions. | 2.6.2 |
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