The door hinge is an important part of door, it can make open and close the door easily, can also make the door installation and removal easy. We have plated the surface of exterior and interior door hinges, it looks smooth and deepens the beauty of commercial building. Compared with single hinge, the door hinges hardware offers additional savings.

The general term for metal and non-metal products and accessories installed in buildings or structures. Generally, the utility model has double effects of utility and decoration. Door hardware refers to all kinds of metal and non-metal accessories installed on the building door. There are building lock, handle, support, hinge, door closer, handle, bolt, anti-theft chain, door closing device, etc.

The Door Accessories that complements your door—the Door Hinges, Locks, Lever Handles, Door Closers, Flush Bolts, Door stopper, faithfully perform their jobs. Should you choose the door hardware, it is important to account for budget, style and function. As a professional suppliers of door hardware, D&D offers a combination of architecture door hardwares to suite the individual building whatever it is exterior or interior, meeting not only the requirements for design and function, but also the desired budget.

These days , Chinese Factories are experiencing unexpected delays in productions and even closing theirs door for a couple of weeks. The reason is because Beijing is sending inspectors to make sure factories are complying with state environment rules in fighting the country’s war on pollution. The central government of China has sent an army of inspection teams into the financial hub of Shanghai and Guangdong to monitor and inspect air pollution in the regions, to make sure the environment stays clean and it’s safe for the people in the region. Most of the factories, especially in Jiangmen and Zhongshan areas, have temporary closed for 7-20 days, causing delays in finishing orders in this already super rushed and busy season.

In general, as long as there are doors, locks are needed, and locks are an integral part of any place. A door lock can protect the personal belongings are not violated, so to ensure the integrity of the lock is important. However, as the years accumulate, dust accumulation, wear or rust will occur on the locks, so do you know how to fix the locked door lock?

When it comes to the fire safety work in the buildings, it is inevitable to mention an important role: fire doors. The matching door hardware is the most important thing to make the fire door have the true fireproof function. Today, let’s talk about how the door hardware of D&D Hardware helps the building to solve fire safety problems.

It is commonly stated that “stainless steel is non-magnetic”. This is not strictly true and the real situation is rather more complicated. The degree of magnetic response or magnetic permeability is derived from the microstructure of the steel. A totally non-magnetic material has a relative magnetic permeability of 1. Austenitic structures are totally non-magnetic and so a 100% austenitic stainless steel would have a permeability of 1. In practice this is not achieved.

IntroductionAustenitic stainless steels are generally non-magnetic with magnetic permeabilities of around 1.0. Permeabilities above 1.0 are associated with the amount of either ferrite or martensite phases present in the 'austenitic' steel and so depend on:chemical composition cold work and heat tr

As a professional door lock manufacturer in China, we provide customers various exterior and interior door lock, like Euro Mortise Lock, Privacy Lock, Deadbolt Lock, Bathroom Door Lock, Narrow Stile Lock, etc. Our door locks are high-quality, durable, anti-rust and textured. The door locks we provide are suitable for wooden door, metal door, fire rated door, double door, single door, steel door of commercial or residential application.

When selecting stainless steel hardware, it is important to understand the differences between the variety of grades and finishes available so you can choose the products that will work most safely and effectively for your purposes. It's difficult to distinguish between these two types of steel visually, but significant differences between the two steel types do exist and are important to understand. Below is a basic guide to the similarities and differences of 304 grade and 316 grade stainless steel.

The D&D Hardware rang of architectural lock is manufactured to the highest engineering standards and designed to offer a high price/performance ratio. They have been successfully type tested to all the requirement of BS EN 12209.

The appropriate specification and correct selection of hinges is crucial to their performance and depends on the following factors; 1. Is it a fire, smoke or emergency escape door? 2. How heavy is the door and what are the door dimension (height, width and thickness)? 3. What is the door's construction and are there any unusal features that could affect the hinges? 4. Where is the door situated e.g internal or external; is it near the coast or in a swiming pool? 5. What level of use/abuse will the door be subject to e.g office, hospital or school corridor? 6. What other items of hardware are to be fitted, that may be affect the hinge performance, typically door closer or door stops? 7. Any other unusal features involved e.g. door has radius top or the door is a bifold.

The door closer is a hydraulic device similar to the spring on the door head. When the door is opened, it can be released after compression, and the door can be closed automatically. It has the function of spring door, which can ensure that the door can be closed to the initial position accurately and timely after being opened.

BS EN 1154:1997 -The European standard for the performance of controlled door closing devices. Providing details on product types, classification by use, test cycles, test cycles, door mass, corrosion resistance, as well as definations, product performance requirements, test apparatus, test methods and marking of products. BS EN 1154:1997 classifies door closers by using a 6 digit coding system.