How many ways are galvanized steel pipes connected?

There are three connection methods for galvanized pipes:

<>1. Groove connection.

Cracking of the roller groove weld:

Grind the inner wall welding rib of the groove pressing part of the nozzle to reduce the resistance of the rolling groove;

Adjust the axis of the steel pipe and the rolling groove equipment, and require the steel pipe and the rolling groove equipment to be level;

Adjust the groove pressing speed, the groove forming time can not exceed the specified time, and apply force evenly and slowly.

Fracture of the rolling channel steel pipe:

Smooth the welded ribs on the inner wall of the groove pressing part of the steel pipe nozzle to reduce the resistance of the rolling groove;

Adjust the axis of the steel pipe and the rolling groove equipment, and require the steel pipe and the rolling groove equipment to be level;

Adjust the groove pressing speed, the groove pressing speed can not exceed the regulations, and apply force evenly and slowly;

Check the width and model of the support roller and the pressure roller of the groove rolling equipment, and whether there is any occlusion caused by the mismatch of the size of the two rollers;

Use vernier calipers to check whether the grooves of the steel pipe are specified.

The groove rolled by the groove rolling machine should meet the following requirements:

The surface from the end of the pipe to the groove section should be flat without concave and convex and no rolling marks;

The center of the groove circle should be concentric with the pipe wall, the width and depth of the groove should meet the requirements, and check whether the clamp model is correct;

Apply lubricant to the rubber seal and check whether the rubber seal is damaged, and the lubricant must not be oil lubricant.

2. Welded connection.

After the galvanized steel pipe nozzle is docked, it is not in a straight line and the steel pipe has the problem of beveling, it is recommended to cut off a short section of the steel pipe head before processing;

After the galvanized steel pipe nozzle is docked, the two nozzles are not tightly docked, resulting in uneven thickness of the weld, and the steel pipe is elliptical due to its own reasons or transportation bumps, so it is recommended to cut off a short section of the steel pipe head before processing;

After the galvanized steel pipe nozzle is docked, a sand hole appears at the nozzle, which is caused by technical reasons during welding;

Zinc tumors are present in the nozzles, causing welding difficulties and sand hole problems, and simple zinc tumor removal treatment is carried out for zinc tumors that are too large and too many tubes.

3. Wire connection.

Threaded buckles: The pipe hoop and the threaded buckle can not be completely contacted and loosened, cut off the chaotic buckle part, and re-install the wire;

If the steel pipe thread buckle and the pipe hoop thread buckle do not match and cannot be connected, the pipe hoop should be replaced or the equipment should be adjusted to re-wire;

Missing marks after wire turning of steel pipe: Measure whether the wall thickness of the steel pipe can meet the standard thickness requirements of the wire pipe.

There are three connection methods, namely welding connection and clamp groove connection.

There are three kinds of flange connections. 1. Welded connection.

Welding two galvanized steel pipes is a more commonly used connection method, which is more time-consuming, but it is the best for the overall quality, and it is not easy to leak water after welding. Second, the clamp groove connection mode.

Clamp groove connection is now more popular connection mode, construction is convenient, only need to process two steel pipes with grooves, and then connect with clamps, this mode needs to use better quality clamps, poor quality clamps are easy to leak, and there are hidden dangers left for users in the future. 3. Flange connection method.

Flange connections are generally used at the connection valve.

Answer: There are three connection methods for galvanized pipes: 1. Groove rolling method to connect the groove welding seam cracking: Smooth the inner wall welding rib of the groove pressing part of the nozzle to reduce the resistance of the groove; Adjust the axis of the steel pipe and the rolling groove equipment, and require the steel pipe and the rolling groove equipment to be level; Adjust the groove pressing speed, the groove forming time can not exceed the specified time, and apply force evenly and slowly.

Fracture of the steel pipe in the rolling channel: Grind the welded bar on the inner wall of the pressing groove part of the steel pipe nozzle to reduce the resistance of the rolling groove; Adjust the axis of the steel pipe and the rolling groove equipment, and require the steel pipe and the rolling groove equipment to be level; Adjust the groove pressing speed, the groove pressing speed can not exceed the regulations, and apply force evenly and slowly; Check the width and model of the support roller and the pressure roller of the groove rolling equipment, and whether there is any occlusion caused by the mismatch of the size of the two rollers; Use vernier calipers to check whether the grooves of the steel pipe are specified. The groove rolled by the groove rolling machine should meet the following requirements:

The surface from the end of the pipe to the groove section should be flat without concave and convex and no rolling marks; The center of the groove circle should be concentric with the pipe wall, the width and depth of the groove should meet the requirements, and check whether the clamp model is correct; Apply lubricant to the rubber seal and check whether the rubber seal is damaged, and the lubricant must not be oil lubricant. 2. Welded connection The galvanized steel pipe nozzle is not in a straight line after the docking and the steel pipe has the problem of oblique mouth, it is recommended to cut off the steel pipe head for a short period before processing; After the galvanized steel pipe nozzle is docked, the two nozzles are not tightly docked, resulting in uneven thickness of the weld, and the steel pipe is elliptical due to its own reasons or transportation bumps, so it is recommended to cut off a short section of the steel pipe head before processing; After the galvanized steel pipe nozzle is docked, a sand hole appears at the nozzle, which is caused by technical reasons during welding; Zinc tumors are present in the nozzles, causing welding difficulties and sand hole problems, and simple zinc tumor removal treatment is carried out for zinc tumors that are too large and too many tubes. 3. Wire connection thread buckle disorderly buckle:

If the pipe hoop and the thread buckle can not be completely contacted and loosened, the random buckle part should be cut off and the wire should be re-installed; If the steel pipe thread buckle and the pipe hoop thread buckle do not match and cannot be connected, the pipe hoop should be replaced or the equipment should be adjusted to re-wire; Missing marks after wire turning of steel pipe: Measure whether the wall thickness of the steel pipe can meet the standard thickness requirements of the wire pipe.

Welding, flange and the rest are gone.

The connection between PVC pipe fittings and steel pipes and cast iron pipes is generally connected by flange joints (specifications above medium diameter), valve joints (socket bonding and external thread transformers) can be used to connect small diameters, and the tooth ends are connected with the same diameter joints of metal pipes. For small diameters, it is also possible to use "socket bonding and internal thread adapters" (one end of the joint is a female thread).

The connection between PVC pipe and metal pipe, medium and large diameter can also use "slope ring", that is, PVC pipe with PVC slope ring to make a flat mouth (with metal flange), then it can be connected with the flange of the metal pipe with screws, and the number of screw holes and the position of the screw hole of the metal flange at the end of the PVC pipe can be matched with the metal pipe flange. It can also be combined with a looper (the outer diameter of the metal pipe should be turned to be consistent with the outer diameter of the PVC pipe).

Copper pipe has the advantages of corrosion resistance, sterilization, etc., is the best product in the water pipe, copper pipe interface has ferrules, welding and self-locking circlip and other connection methods. If the ferrule has been in existence for a long time, there is the problem of aging and water leakage, and the welding is to use the hot melt process to weld the two connectors to achieve the effect of connection. The connection strength is high, and the weld gas protection of the on-site weld is difficult to meet the standard, resulting in easy rusting of the weld and directly reducing the service life of the pipeline; The installation quality is highly dependent on the technology of the welder, and the quality is difficult to stabilize.

Because the cast iron pipe is connected by socket port, while the steel pipe is generally welded, and the outer diameter and inner diameter of the two pipes are inconsistent, a special method is required for connection operation. At present, there are two main methods commonly used: flange connection and socket connection.

1. Flange connection, this kind of hail method in front of the stool is a general connection method, and the principle of this method is that the cast iron pipe and the steel pipe are converted into flange interfaces, so as to achieve standard docking.

2. Socket connection, the method of socket connection is to ensure that the connection position is the socket for the ductile iron pipe (if not, the double socket sleeve is used to make the socket end converted into the socket end), and the steel pipe end is welded with an additional layer of steel plate in its outer diameter of the socket, so that the outer diameter of the steel pipe is guaranteed to be the same as the outer diameter of the ductile iron pipe. The steel pipe is then inserted into the socket of the ductile iron pipe for installation.

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How to connect galvanized steel pipe with stainless steel pipe? There are the following methods: 1) Connecting by indirect fusion methods such as blue, wire head, union joint, etc.

2) Adopt welding method to connect. Because galvanized pipes are actually carbon steel pipes, the welding of galvanized pipes and stainless steel pipes is actually the welding of carbon steel and stainless steel, which is the welding of dissimilar materials. Before welding, pay attention to the removal of the galvanized layer next to the groove.

After soldering, brush with silver powder. There is a lot of information about the welding of carbon steel and stainless steel, and you can check it online.