Questions & Answers
Stainless steel grades for elbows
Stainless steel couplings are made from the following steel grades: 03Х17Н14М3, 10Х23Н18, 06ХН28МДТ, 10Х17Н13М2Т, 08Х18Н10Т, 12Х18Н10Т, 08Х18Н10.
Stainless Steel Nipple Standards
International Standards:
ISO 228-1 - Cylindrical Pipe Threads;
ISO 7-1 - Pipe Threads for Sealed Joints.
GOST Standards:
GOST 14192-96 - Packaging and Marking;
GOST 7566-2018 - Rules for Accepting Metal Products;
GOST 5632-2014 - Stainless Steel Grades;
GOST 8955-75 - Locknuts;
GOST 8954-75 - Transition Couplings;
GOST 8944-75 - Straight Couplings;
GOST 3262-75 - Water and Gas Pipes;
GOST 6211-81 - Tapered Pipe Threads;
GOST 6357-81 - Cylindrical Pipe Threads;
GOST 8969-75 - Steel threaded nipples.
Stainless Steel Coupling Weight Chart
| DN | Thread size | Length, mm | Weight of 1 piece, kg |
| DN15 | 1/2" | 110 | 0.1 |
| DN20 | 3/4" | 110 | 0.15 |
| DN25 | 1" | 130 | 0.25 |
| DN32 | 1 1/4" | 150 | 0.4 |
| DN40 | 1 1/2" | 150 | 0.55 |
| DN50 | 2" | 170 | 0.85 |
| DN65 | 2 1/2" | 200 | 1.4 |
| DN80 | 3" | 220 | 2.1 |
| DN100 | 4" | 250 | 3.5 |