Shelf tube knowledge encyclopedia

Construction sites or construction sites have always been dangerous, so some tools to ensure construction workers or passers-by can often be seen on construction sites or construction sites, but most people don't know much about them. The following small series gives you a comprehensive explanation of the shelf pipes.

What is the shelf tube?

Shelf pipe is a special term used by people in the construction or construction industry; the shelf pipe can play different roles in construction sites and construction sites; in order to facilitate the decoration and construction of higher floors, it is impossible to directly construct the site; the shelf pipe can also Provide safety protection for construction workers and roadside pedestrians, maintenance of peripheral safety nets and installation of high-altitude installations.

Shelf type

According to the material of the rod

1 Shelf tube of single-size steel pipe: It is made of steel pipe of the same specification (for example: fastener-type scaffolding. For example: Ф48×3.5 electric welded steel pipe) Note: Ф In the field of mathematics, “the equation has no real solution (root)”.

2 A scaffold tube made up of steel pipes of various specifications: it is composed of two or more steel pipes of different specifications (for example: door scaffolding)

3 All steel-based scaffolding: its meaning can be understood as scaffolding which is mainly made of steel pipes and assisted by other types of steel bars (for example: scaffolding with base type or grooved steel roof) Supporting scaffolding and scaffolding with attached steel plates)

Distinguish between the vertical force of the pole and the crossbar

1 Relying on scaffolding to contact the ground friction force transmission: it can be understood as the form of the crossbar force of the scaffolding node after the frictional compression of the ground contact to support the crossbar load and then pass it to the pole (for example: fastener The effect is the friction generated by the positive pressure of the tightening bolt)

2 Relying on the weld force: It can be understood as the socket connection of the crossbar and the pole (with the socket joint). For example, the gantry is constructed in this way.

3 relying on direct pressure transmission: most of them are found in the scaffolding method that is very dry and placed on the top of the pole.

4 Relying on the pin-type anti-shear force transmission: that is, the rod is passed through the vertical connecting plate of the cross bar and the hole of the pole to complete and realize the connection, and the pin is subjected to the shearing force on both sides. This method of use is not very common in the connection of rails and poles.

Shelf tube material

The material of the shelf tube mainly includes: 15CrMo, 42CrMo, Cr5Mo, Cr9Mo, A335P11, A335P22, 12Cr1Mov, 10CrMo910, 321, 304, 304L, 316, 316L, Q195-Q345B, 10#, 20#, 45#, 16Mn-35Mn, Other materials such as 27SiMn.

Shelf tube structure

The shelf tube is mainly composed of: jacket, beam core and joint. The shelf tube is composed of a tube fastener and a steel tube, and the joint combination of the shelf tube and the fastener constitutes a steel tube type scaffold, which is an important component of the fastener type steel tube scaffold. In general, the number of scaffolds is 91 per bundle.

The above contents of the shelf tube will be introduced first. For more information, please pay attention to GO Jiaju.

Source: GO Jiaju

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Active Ingredient:     Quaternary ammonium salt cationic surfactant 
Chemical Name:       Formaldehyde-free Fixing Agent  
Chemical Family:     PolyDADMAC

CAS No.:                   26062-79-3  

1.Formaldehyde-free Fixing Agent 

2.Has no free formaldehyde,no peculiar smell,no irritation to skin, accord to eco request  

[Description]:

        Formaldehyde-free Fixative Color Fixing Agent is belongs to polymerization polyDADMAC, a cationic polymer. It can make up of macromolecular compound with dye, then achieve to improve soaping and rub fastness of fabrics. It can be used for color fixing for dyeing and printing of reactive dyed fabrics as cotton, linen, silk, and direct dyed fabrics.

[Specification]:

              Appearance:  Brownish yellow viscous liquid

              Ionic character:  Cationic

              PH Value:  5-8 (1% aqueous solution)

              Dissolution:  Dissolve in cold water easily.

              Composition: Special polymer compound

[Dilution Method]:

With 4-6 times the water and stir to dissolve dilution.

[Direction for Usage]:(To dilute finished product as an example)

A. Padding Process: 5-20g/L, temperature 40°C-60°C, PH Value:5-8, One-dip-one-nip or Double-dip-double-nip.

B. Dipping process: 1-4% (O.W.F), Room temperature 40°C-60°C, PH Value:5-8, bath ratio:1:8-12,Time: 20-30 min.

[Properties]:

1. Concentrated Formaldehyde-free Fixative Fixing Agent has good color fixing property, can obviously improve the dyeing or printing of fabric soaping, washing fastness and wet rubbing fastness.

2. Can be used for much of the association between dye fixation, anti fading property, does not affect the dyeing or printing of fabric vividness. No effect for the original feel, processing fabric has excellent hydrophilic.

3. Formaldehyde-free Fixative  widely used for dyeing or printing of the direct, active dye fixing finishing, good fixation effect, especially for the red dye and Cuilan dyes, particularly prominent, fixation is better than the general Formaldehyde-free Fixative.

4. The dye PH value for a wide range, acid, alkali resistance, resistance to hard water, high temperature resistance, an environment-friendly products, does not contain formaldehyde.

Textile Chemicals

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