flanged pipe fittings

The national standard bend is the bend that the national standard produces. GB12459 steel welded seamless pipe fittings, GB/T14383 "forged steel socket welding fittings", GB/T14626 "forged steel threaded pipe fittings", GB/T13401 "steel plate butt welding fittings".

National standard elbow and other performance comparison:

1. Long-term pressure resistance performance, only from the design stress, the pressure resistance of the national standard stamping elbow is better. However, due to various factors, the actual wall thickness of the floor heating tube is usually 2mm. In this wall, all kinds of pipes can meet the requirements of floor heating.

2. Thermal conductivity: the pipe needed for floor heating needs good thermal conductivity.

3. Thermal shock resistance of low temperature: PE- RT and PEX have good low-temperature impact performance. During the winter construction, the pipe material is not easy to be impacted and ruptured, which increases the flexibility of construction arrangement.

4. Environmental protection: PE-RT can be recycled and not pollute the environment. And PEX cannot be recycled to produce secondary pollution;

5. Stability of processing performance: PEX has the problems of controlling crosslinking degree and crosslinking uniformity, and processing complex and processing directly affects the performance of pipe material.

Gb elbow in the industrial production equipment life are the main pipe, elbow in using and maintaining a lot of matters need to pay attention to when, need to users according to certain methods to use, according to the accurate method to use and maintenance.

Some simple things to note while using the installation:

1. The long storage elbow should be regularly checked, and the surface of the processed surface should be kept clean and kept in a clean and dry place, which is strictly prohibited to be placed or stored in the open air. Always keep the stainless steel elbow dry and ventilated, keep the device clean and tidy, and keep it in proper storage.

2. When installing, the stainless steel elbow can be directly connected to the pipe on the tube, and installed according to the location used. In general, can be installed on the pipeline at any position, but need to test for easy manipulation, should pay attention to the flow direction of medium by the stainless steel elbow is high, the longitudinal disc below stainless steel elbow can only be installed horizontally. The stainless steel elbow should be attentive to the seal during installation to prevent the leakage and affect the normal operation of the pipe.

Bolts should be tightened evenly and should not be deflected to prevent damage to stem movement or leakage.

4, bend the ball valve, cut-off valve, gate valve, when used only for full open or full close, does not allow for regulating flow, lest sealing surface erosion, accelerated wear. On the gate and thread globe valve with sealing device, the handwheel back to the top position and tighten, prevent leakage of media from the packing.

5. Hand wheel for elbow, do not use lever or other tools to avoid damage valve parts. The handwheel turns clockwise to close, and vice versa, to ensure proper use of methods and means.

Bolts should be tightened on average and should not be deflected to prevent damage to stem movement or leakage.

7. In the process of use, the elbow should always be kept clean, and the transmission thread must be lubricated in time. When the fault is found, it should be stopped and used immediately to find out the reason for the failure.