General: As rainwater pipes are generally fitted externally, joints between each spigot and socket length do not need to be sealed. However offset fittings are sized to allow for push fit or solvent weld jointing. Gutter outlets are normally positioned directly above drain connections but on occasions it may be necessary to rotate the offset to avoid obstructions below. However when using the square downpipe system, the gutter outlet should be positioned directly above the rainwater drain connection, as square offsets cannot be rotated. Where a RH25 hopper head is used, the RLE3 outlet adaptor with a pipe socket are required to provide the necessary transition from circular to square.

downpipes 237x300 - Downpipes

1. Offset assembly

Offsets can be easily constructed on site from a range of bends depending on the roof overhang at the eaves. Where offsets exceed 600mm it is recommended that bends are solvent welded to gutter outlet spigots to ensure a positive connection. When two 87½° bends are used to construct an offset the horizontal section of pipe should be supported with a pipe clip from the soffit.

2. Location of pipe clips

Every rainwater pipe should have a clip located round the top socket to support the downpipe system. Intermediate clips should then be located at a maximum of 1.8m centres or in the middle of each length to maintain alignment. A gap of 10mm should be left between the end of each pipe and the bottom of the socket to allow for thermal movement. Two different pipe clip fixing methods are available. A one piece clip for flush fixing or a two piece clip to fit both the downpipe and pipe socket. These are used with backplate RCB300 and allow for adjustment. Each should be secured with two 32 x 6.5mm non-ferrous round head screws. An extension backplate RT200 can also be used for greater adjustment of the downpipe from the wall.

3. Drain connections

External rainwater pipes usually connect direct to the surface water drain. Where a direct connection is made a reducer and a short section of pipe is used to provide the transition between different pipe sizes. A gully trap will be required to both arrangements where the drain connects to a combined foul and surface water drainage system.

Differences between hot galvanizing and cold-galvanizing processes

The galvanizing process of building materials is very versatile, so today we will understand the difference between the two common galvanizing methods, hot galvanizing and cold-galvanizing. These two ways we define them in terms of definition, process.

galvanizing process - Differences between hot galvanizing and cold-galvanizing processes

Definition difference

Hot galvanizing is an effective metal anti-corrosion method, mainly used in metal structure facilities of various industries. The rust-removed steel is immersed in a zinc solution melted at about 500 ° C to adhere the zinc layer to the surface of the steel member, thereby preserving the corrosion. Galvanizing is for steel grid plates, which are chemically treated and are electrochemical reactions. Cold galvanizing is a physical treatment, except that a layer of zinc is applied to the surface, so the zinc layer is easy to fall off. Hot-dip galvanizing is often used in construction.

Cold galvanizing: It is electro-galvanized. The amount of zinc on the surface is small, only 10-50g/m2, which is a process of attaching a metal film to the surface of metal or other materials by electrolysis. The process of forming a uniform, dense, and good bonding metal layer can prevent corrosion, improve wear resistance, electrical conductivity, light reflectivity, and enhance aesthetics. Hot-dip galvanizing is the galvanization of the surface of the steel body under hot-dip conditions. Its adhesion is very strong and it is not easy to fall off. Although the hot-dip galvanized pipe also has rust phenomenon, it can meet the technology and hygiene in a long period. Claim.

Process difference

Hot galvanizing: It is a time when the workpiece is degreased, pickled, dipped, dried and immersed in molten zinc for a certain period of time.

Cold galvanizing: also called electro-galvanizing, is the use of electrolysis equipment to remove the oil, pickling and put into the solution of zinc salt y_toitt, and connect the negative electrode of the electrolysis equipment; place the zinc plate on the opposite side of the workpiece to connect to the electrolysis The positive pole of the device, when the power is turned on, and the current is moved from the positive electrode to the negative electrode, a layer of zinc is deposited on the workpiece.

If you want to know more details about the galvanizing process, please feel free to contact with us at any time.

Steel sheet roll forming machine for corrugated roof

Metal corrugated roof is widely used for commercial metal buildings, associated with residential and commercial. Corrugated steel sheet roll forming machine is special designed for its production. To make sure the finished product perfect, our machines has high precision and accuracy. I will show you more details about the steel sheet roll forming machine for corrugated roof.

Check some profiles of corrugated roof

corrugated roof profile 300x244 - Steel sheet roll forming machine for corrugated roof


  • Light weight
  • Low cost
  • Easy to install

Parameters of steel sheet roll forming machine for corrugated roof

Rolled material 0.3-0.8mm thickness, aluminum sheet, galvanized sheet, colored steel sheet and various steel plates
Effective width 1100mm(can be customized)
Feeding width 1250mm(can be customized)
Forming steps

14 stations

Roller 45# forged steel, hard chrome plating within 0.05mm
Diameter of shaft 70mm
Main motor power 4 kw
Pump power 3 kw
Sprocket chain 1 inch
Drive type by chain
Cutting Blade Cr12, heat treatment 60-62°C
Frequency Converter It has the advantage of slowing down before cutting, to ensure the length accuracy (±1mm, far better than industrial standard ±3mm).
component 1 set of manual decoiler,1 set of main roll forming machine,1 set of computer control,1 set of hydraulic System,

1 set of cutting mechanism,1 set of counter,1 set of output table

Payment terms cash,T/T,L/C.
Delivery time 40 working days

corruagted roofing sheet making machine 副本 300x182 - Steel sheet roll forming machine for corrugated roofCorrugated machine  300x300 - Steel sheet roll forming machine for corrugated roof

Color steel plate roll forming machine

The color steel plate not only has the mechanical strength of the steel material, the performance of easy forming, but also the good decorative and corrosion resistance of the coating material. It is become larger and larger for the color steel plate requirements. To meet the different requirements from the different countries, we contributes our energy to make our color steel plate roll forming machine become more and more advanced.

Take some profiles of the finished product and color steel plate roll forming machine

trapezoidal shape metal roofing sheet 300x161 - Color steel plate roll forming machineroof tile roll forming machine 300x300 - Color steel plate roll forming machine

More usages about the color steel plate

Color steel plates are emerging materials that are highly respected in the world today. With the advancement of science and technology, the enhancement of environmental awareness, and the improvement of people’s living standards, color steel plate activity rooms are showing more and more vitality and broad market prospects, and are subject to construction, home appliances, electromechanical, transportation, interior decoration, and office equipment. And the favor of other industries.
The color steel plate movable room has the advantages of light weight, high strength, heat insulation, beautiful appearance and durability, and is a high-speed building installation which is integrated with architecture and decoration. Color steel plate movable room construction is clean, widely used in large-span factory buildings, warehouses, office buildings, villas, roof tops, air purification rooms, cold storage, shops, kiosks and temporary houses. Light color steel sandwich panel square weight less than 14KG can fully reduce the structural load and reduce the cost of the movable room structure

color steel plate activity room 300x172 - Color steel plate roll forming machine

Roll forming machine

The roll forming machine adopts high-level automatic control software to realize production information management. The entire unit automation control system uses a highly integrated network to make the automation system perform better. Color steel tile equipment also has the advantages of operation, maintenance, maintenance, mechanical debugging, and easy mold replacement.

Some types of roll forming machine

metal tile effect roofing sheets roll forming machine 300x169 - Roll forming machinedouble layer machine 300x300 - Roll forming machine

Components of roll forming machine

The roll forming machine is mainly composed of a left and right body, a bottom connecting rod, a top chassis cover, a pulley, a gear mechanism, a sheave mechanism, a cam mechanism, a lubrication pump, an oil circuit system, and an electric control department. Equipment should be wiped frequently, kept clean, and no muddy water.

Other information:

The roll forming machine will be equipped with a set of lubrication system. When the machine is running, it will automatically lubricate all the bearings, transmission gear mechanism and moving guides.

We can design and build customized forming machines, for example, some customers may prefer a separate forming stands structure trapezoidal sheet roll forming machine, and some customers needs safety guard on the roll forming machine body etc, the detailed specifications will vary from the above list and all quotation sheets will be made exactly as per the technical drawings customers supply.

If you have requirements about the machine, please feel free to contact with us at any time. We will provide the suitable solution to you according to your profile. And we provide the customers 24/7 services, so if you have any questions, we can give you the professional answer. If you have free time, welcome to visit our factory so that we can show you more details about our machine.

High quality trapezoidal roof sheet making equipment

A regular roof sheet making equipment can be technically available to produce the sheets which are applied as roof panels or wall cladding sheets. There are innumerable sheet profiles used as roof panels or wall cladding sheets or metal facade panels in each corner of the world, and each profile will required one roll forming machine at least one roll forming unit. I will show you detail information about the high quality trapezoidal roof sheet making equipment.

Some profiles of trapezoidal roof sheet

300x153 - High quality trapezoidal roof sheet making equipment

Components of trapezoidal roof sheet making equipment

Un-coiler System

Usage: It is used to supoort the steel coil and uncoil it in a turnable way.

Passive uncoil pulled by roll forming system

Loading capacity Uncoiling width Inner diameter
5 T 1250 mm 450-550 mm

5T manual decoiler 副本 300x232 - High quality trapezoidal roof sheet making equipment

Coil feeding part

Usage: put the raw material through the beach to manufacture and process, it can guarantee that the products are neat, parallel and everything is uniformity. please refer to the equipment regulation to know the function of locate broad.

roof panel roll forming machine 300x188 - High quality trapezoidal roof sheet making equipment

Forming device

Usage: In order to keep the product shape and precision, adopts welded sheet structure, motor reducer drive, chain transmission, roller was chromed which can keep the molding plate surface smooth and not easy to be marked when it is working

Feature: Ensure stability , precision and lifetime.

No.                    Main parameter
1  Length of the main part  8500 * 1650 * 1450 mm
2  Weight of main part  5.5 t
3  Voltage  380 V/ 50 HZ 3 Phase (as customer’s request)
4  Roller fixer  Middle plate welded
5  Frame  350 H steel welded
6  Frame thickness  20 mm
7  Drive mode  Chain
8  Material of rollers  45# steel, surface hard chromium plating.
9  Material of shafts  45# steel
10  Diameter of shafts  Φ 70 mm
11  Number of rollers  14 rollers
12  Main power 4 kw
13  Hydraulic power  3 kw
14  Cutting type  Hydraulic cutting(without waste)

roof and wall cladding roll forming machine 300x300 - High quality trapezoidal roof sheet making equipment

Cutting device

Advanced hydraulic drive, automatic punching and cutting after forming, no distorting or wasting, high level safety factor.

(Include cutting tools, hydraulic tank, cutter machine)


Blade Material Cutting system
Cr12 quenched Full automatic

1080 glazed tile roofing sheet machine

The glazed tile roofing sheet formed by the glazed tile roofing sheet machine has the characteristics of beautiful appearance, simple and elegant, exquisite shape and noble taste. It can be widely used in villas, resorts, garden factories, tourist scenic spots, pavilions, hotels, exhibitions. Buildings and other buildings. I will introduce detailed about the 1080 glazed tile roofing sheet  machine.

Check the profile

1080 glazed tile roofing sheet machine 300x134 - 1080 glazed tile roofing sheet machine

Features of glazed tile roofing sheet:

  • Used for commercial and residential applications.
  • Solid structure.
  • Eco-friendly material.
  • Durable.
  • Easy to install and dismantle.

More detail information about the 1080 glazed tile roofing sheet machine

The glazed tile roofing sheet equipment mainly consists of the uncoiler, the feeding coil platform, the main roll forming machine, the die pressing device, the forming shearing device, the hydraulic station, the computer control system, and the finished product stacker.
The optional equipment includes a common uncoiler, a hydraulic unciler, and an automatic stacker.

1 Machine size:9000mm × 1700mm × 1600mm
2 number of rollers: 16
3 roller material: 45# steel
4 roller plating thickness: 0.05mm
5 cutter material: Cr12
6 molding speed: 3-5 m / min.
7 electronic control system: industrial computer PLC frequency conversion control
8 host power: 4KW
9 hydraulic station power: 4KW
10 sheet thickness: 0.4-0.6mm
11 plate expansion width: 1250mm (other widths can be customized)

color steel glazed roofing tile making machine 300x300 - 1080 glazed tile roofing sheet machine

Automatic sandwich panel production line

The automatic sandwich panel production line is the most ideal equipment for producing color steel foam and rock wool composite sandwich panels. It is a special mechanical equipment for processing color steel thermal insulation composite board with gas, electricity and machinery as one. The working speed is variable frequency stepless speed regulation, and it can be used for one-time composite city corrugated composite board.

rock wool sandwich panel roll forming machine 300x300 - Automatic sandwich panel production line
The automatic sandwich panel production line adopts the highly integrated network of the whole unit automation control system to realize the information management of production and make the automation system more superior, with the advantages of manipulation, maintenance, maintenance, mechanical debugging and mold replacement.

sandwich panel machine 300x300 - Automatic sandwich panel production line

The automatic sandwich prodcution line consists of a single board machine and a composite board machine. It combines two production processes into one. It can be composited into a corrugated composite board at one time, which overcomes the shortcomings of the traditional corrugated type and the manual combination. The machine and the compound machine can each be produced independently. The whole machine adopts advanced production technology and mechanical and electrical integration.

The equipment is widely used in the top and wall of light steel structure buildings, such as: industrial plants, movable board houses, large supermarkets and warehouses, large-span roofs and walls, assembly of various cold storage, purification rooms, air-conditioned rooms, etc. An indispensable device in the construction industry.

Advertising plate roll forming machine

The advertising plate is an advertising decorative material mainly used for outdoor. It is a decorative material named after the decoration construction process, installed on the ceiling, renting the door and the wall. They can be installed and used directly, no need to carry out any processing and production, only need to fix the special keel on the billboard frame, and then snap into the advertising plate. As a rich experience roll forming machine manufacture, we design the advertising plate roll forming machine to satisfy the customer requirements.

Check some profiles of the advertising plate

advertising plate 265x300 - Advertising plate roll forming machine

The advantages of advertising plate

1, rich in color, bright and not fade
2, due to high cost performance, will become a trend
3, strong, suitable for all types of fonts
4, production and installation is convenient and fast

Parameters of advertising plate roll forming machine

Size: 5500*1200*1400

Weight t: 4.8 tons

Voltage:380V/50HZ3Phase(as customer’s request)

Roller fixer : Guide column

Frame : middle plate welded

Memorial arch frame type

Frame thickness:25mm

Drive mode: gear

Material of rollers: GCr12MoV

Material of shafts: 45# steel with tempering

Diameter of shafts:50mm

Number of rollers :9 rollers

Main power: 7.5kw

advertising plate roll forming machine 300x271 - Advertising plate roll forming machine

The advertising plate is mainly composed of iron plate, steel plate, aluminum alloy, stainless steel, zinc, and commonly used thermoplastic polyvinyl chloride (PVC). Due to its rich color, strong decoration and good weather resistance, the advertising plate is widely used in outdoor curtain wall decoration and indoor high-end home decoration, advertising decoration and so on.

Classic tile roofing sheet making machine

If you are looking for an attractive yet economical roof material for your property, choose the classic tile roofing sheet.  Suitable for roofs with a pitch above 10 degrees and even useable on vertical surfaces, classic roofing sheets are a highly versatile roofing option that will bring many, many years of reliable service. To making this kind of roofing sheets, we design the classic tile roofing sheet making machine.

Take some finish products of classic tile roofing sheet

classic tile roofing sheet 300x156 - Classic tile roofing sheet making machine

Classic roof tiles have a highly innovative design. Each roof tile has a downturned front edge to aid the filtration of rain water, while the upper edge is upturned, preventing any chance of water entering the internal roof structure. The tiles are designed to form a strong overlap and interlock, creating extremely weathertight and water resistant roofing sheets.The roof tiles are proven to withstand 160mph winds.

Introduction of classic tile roofing sheet making machine

The classic tile roofing sheet automatic production line is a special equipment for metal color stone tile independently researched and developed by our company’s technicians using advanced production technology with gas, electricity and machinery. The working process adopts frequency conversion stepless speed regulation, spray glue, sand covering and drying in one time. The equipment has been tested and improved on the basis of long-term operation, and it is characterized by high efficiency, energy saving, stability, and easy operation. Our company is guided by technological progress, a superb craftsmanship, aiming at quality equipment, constantly pursuing innovation, and keeping our equipment and all kinds of molds to perfection. All the equipment and molds produced by our company provide planning solutions for customers. Technical services to your company, providing one-stop service to customers.

classic tile roofing sheet making machine 300x127 - Classic tile roofing sheet making machine