Hardware knowledge: how to connect valves to pipes
Common valve connections include: flange connection, clip connection, butt weld connection, threaded connection, ferrule connection, clamp connection, self-sealing connection, etc.
First, the flange connection:
The valve body has flanges at both ends, corresponding to the flange on the pipe, and is installed in the pipe through the bolt fixing flange. Flange connections are the most used form of connection in valves. The flange has a face (RF), a plane (FF), a convex and concave surface (MF), and the like. According to the shape of the joint surface, it can be divided into the following types:
1. Smooth type: It is used for valves with low pressure and is convenient to process.
2, concave and convex type: high working pressure, can use medium and hard washers.
3. Gutter type: It can be used with gaskets with large plastic deformation. It is widely used in corrosive media and has good sealing effect.
4, trapezoidal trough type: use oval metal ring as a gasket, used for valves with working pressure ≥ 64 kg / cm 2 , or high temperature valves.
5, lens type: the gasket is a lens shape, made of metal. For high pressure valves with working pressure ≥100 kg/cm 2 or high temperature valves.
6. O-ring type: This is a newer type of flange connection. It has been developed with the appearance of various rubber O-rings. It is more reliable in sealing effect than ordinary flat washers.
Second, the clip connection
The valve is installed in the middle of two flanges. The valve body usually has a positioning hole to facilitate the installation and positioning, and the connection form of the valve and the two pipes directly clamped together by bolts.
Welded connection
1. Butt welding connection: Both ends of the valve body are processed into butt welding groove according to the requirements of butt welding, corresponding to the pipe welding groove, and fixed on the pipe by welding.
2. Socket welding connection: Both ends of the valve body are processed according to the requirements of socket welding, and the pipe is connected by socket welding.
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Type: Ducts for Post Tenisoning
Colour:black and galvanized Color
Thickness:0.3-0.5mm
Diameter.:35mm-120mm;
HS Code:
Shape: Round, Flat;
Raw material: Q195 steel strip(Galvanized or Non-galvanized).
Min Order:100 Meter
Delivery Time: Goods in stock: within 3 days, Goods out of stock(7 days), Goods need to be customized(10-15 days).
Features: Less friction loss during tension course, perfect sealed, no rusty
Origin: Zhejiang Province,China
Certificate: SGS and ISO9001:2008.ISO14001:2004
Length:2.2M/PCS,5.8M/PCS,6M/PCS,or Customize
Application :
It has been widely adopted by modern construction, especially used in pre-tension or post-tension for concrete constructions as building materials, such as bridge construction, railway and highway construction, underground structures,buildings and channel
Galvanized Ducts Thickness: 0.28mm, 0.3mm, 0.35mm, etc
Steel Strip Thickness: 0.25mm, 0.28mm, 0.3mm, 0.35mm
Technical Data of Round Metal Ducts:
|
Inner Diameter |
35 |
40 |
45 |
50 |
55 |
60 |
65 |
70 |
75 |
80 |
85 |
90 |
95 |
100 |
105 |
110 |
115 |
120 |
125 |
130 |
|
allowable deviation |
0.5 |
1 |
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|
Standard steel broadband |
0.25±0.01 |
0.3±0.02 |
0.35±0.02 |
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Technical Data of Flat Metal Ducts:
|
Mini Axis |
Length(Diameter) |
19 |
19 |
19 |
19 |
22 |
22 |
22 |
22 |
25 |
25 |
25 |
25 |
|
Allowable Deviation |
±3 |
±3 |
±3 |
||||||||||
|
0 |
0 |
0 |
|||||||||||
|
Long Axis |
Length(Diameter) |
47 |
52 |
67 |
76 |
|
|
|
|
1 |
|||
|
Allowable Deviation |
±1 |
±2 |
±2 |
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Pre-stressed Metal Corrugated Pipe
Oblate Pre-Stressed Metal Corrugated Pipe,Circular Pre-Stressed Metal,Sewage Pipe
ZHEJIANG BOYA COMTECH CO.,LTD , https://www.zjbytx.com