TECHNICAL INFORMATION
Anasayfa / Technical Information / Steel Pipes (Tubes)STEEL PIPES (TUBES)
The production of weldless pipes can be done by two methods.
a-) Pipe production by extrusion
b-) Pipe production with special rolling methods
The production of these pipes is usually done by hot working but cold working in very soft metallic materials.
a-) Pipe Production by Extrusion:
Cylindrical metallic blocks (wedges) used in pipe extrusion can be solid or perforated. Pipes are produced from filled and perforated wedges in direct extrusion, and only from perforated wedges in indirect extrusion.
In pipe extrusion, a pipe section is obtained by attaching a mandrel to the end of the piston. As seen in the figure, the mandrel connected to the end of the piston is connected in three ways as fixed, movable and drilling mandrel.
b-) Weldless Pipe Production with Special Rolling Methods
In the production of weldless pipes with this method, the principle is to punch the cylindrical metal block by hot working. The next production steps vary depending on the pipe diameter and wall thickness. In the method known as the Mannesmann pipe production method, the hot cylindrical block is brought in the form of a thick walled pipe with two rollers whose axis is slightly inclined to each other and rotating in the same direction, and a punch that performs the drilling process.
- STANDARDS
- ABBREVIATIONS
- VALUES
Standard | Expansion Of Standards | Mean In Turkish |
ANSI | American National Standards Institute | Amerika Ulusal Standartlar Enstitüsü |
API | American Petroleum Institute | Amerikan Petrol Enstitüsü |
ASME | American Society of Mechanical Engineers | Amerikan Makine Mühendisleri Birliği |
ASTM | ASTM International | Amerikan Test ve Malzemeler Birliği |
BSI | British Standards Institution | İngiltere Standartları |
DIN | Deutsches Institut für Normung | Alman Standartlar Enstitüsü |
EN | European Standards | Avrupa Normu |
GOST | State Standards of Soviet | Rusya Standartlar Birliği |
JIS | Japanese Industrial Standards | Japonya Standartlar Enstitüsü |
NF | Norme Française | Fransa Standartları |
Old Definition | New Definition | Description |
+ BK | + C | Pipes that are not heat treated (hard shiny) after cold drawing |
+ NBK | + N | Pipes normalized under shielding gas after cold drawing |
+ GBK | + A | Pipes annealed under shielding gas after cold drawing |
+ BKM | + CR 1 | Pipes not heat treated but suitable for final annealing |
+ CR 2 | Pipes that are not heat treated after welding and gauge calibration | |
+ BKW | + LC | Pipes that have undergone a complementary cold drawn process (soft) with little deformation after heat treatment |
Old Definition | New Definition | Description |
+ BK | + C | Pipes that are not heat treated (hard shiny) after cold drawing |
+ NBK | + N | Pipes normalized under shielding gas after cold drawing |
+ GBK | + A | Pipes annealed under shielding gas after cold drawing |
+ BKM | + CR 1 | Pipes not heat treated but suitable for final annealing |
+ CR 2 | Pipes that are not heat treated after welding and gauge calibration | |
+ BKW | + LC | Pipes that have undergone a complementary cold drawn process (soft) with little deformation after heat treatment |
NOMİNAL DİAMETER | OUTER DIAMETER (INC) | OUTER DIAMETER (mm) | SCH 20 | SCH 30 | SCH 40 | SCH 60 | SCH 80 | SCH 100 | SCH 120 | SCH 140 | SCH 160 | XXS |
1/8 | 10,30 | 1,73 | 2,41 | |||||||||
1/4 | 13,70 | 2,24 | 3,02 | |||||||||
DN10 | 3/8 | 17,10 | 2,31 | 3,20 | ||||||||
DN15 | 1/2 | 21,30 | 2,77 | 3,73 | 4,78 | 7,47 | ||||||
DN20 | 3/4 | 26,70 | 2,87 | 3,91 | 5,56 | 7,82 | ||||||
DN25 | 1 | 33,40 | 3,38 | 4,55 | 6,35 | 9,09 | ||||||
DN32 | 11/4 | 42,20 | 3,56 | 4,85 | 6,35 | 9,70 | ||||||
DN40 | 11/2 | 48,30 | 3,68 | 5,08 | 7,14 | 10,16 | ||||||
DN50 | 2 | 60,30 | 3,91 | 5,54 | 8,74 | 11,07 | ||||||
DN65 | 21/2 | 73,00 | 5,16 | 7,01 | 9,52 | 14,02 | ||||||
DN80 | 3 | 88,90 | 5,49 | 7,62 | 11,13 | 15,24 | ||||||
DN90 | 31/2 | 101,60 | 5,74 | 8,08 | ||||||||
DN100 | 4 | 114,30 | 6,02 | 8,56 | 11,13 | 13,49 | 17,12 | |||||
DN125 | 5 | 141,30 | 6,55 | 9,52 | 12,70 | 15,88 | 19,05 | |||||
DN150 | 6 | 168,30 | 7,11 | 10,97 | 14,27 | 18,26 | 21,95 | |||||
DN200 | 8 | 219,10 | 6,35 | 7,04 | 8,18 | 10,31 | 12,70 | 15,09 | 18,26 | 20,62 | 23,01 | |
DN250 | 10 | 273,00 | 6,35 | 7,80 | 9,27 | 12,70 | 15,09 | 18,26 | 21,44 | 25,40 | 28,58 | |
DN300 | 12 | 323,90 | 6,35 | 8,38 | 10,31 | 14,27 | 17,47 | 21,44 | 25,40 | 28,58 | 33,34 | |
DN350 | 14 | 355,60 | 7,92 | 9,52 | 11,13 | 15,09 | 19,05 | 23,82 | 27,79 | 31,75 | 35,71 | |
DN400 | 16 | 406,40 | 7,92 | 9,52 | 12,70 | 16,64 | 21,44 | 26,19 | 30,96 | 36,52 | 40,49 | |
DN450 | 18 | 457,20 | 7,92 | 11,13 | 14,27 | 19,05 | 23,82 | 29,36 | 34,92 | 39,69 | 45,24 | |
DN500 | 20 | 508,00 | 9,52 | 12,70 | 15,09 | 20,62 | 26,19 | 32,54 | 38,10 | 44,45 | 50,01 | |
DN550 | 22 | 558,80 | 9,52 | 12,70 | 22,22 | 28,60 | 34,92 | 41,28 | 47,62 | 53,98 | ||
DN600 | 24 | 609,60 | 9,52 | 14,27 | 17,48 | 24,61 | 30,96 | 38,89 | 46,02 | 52,30 | 59,54 |