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  • Application Technique of Door Hardware

    Door hardware has a very important position in the modern complex function construction project.Standardized and professional hardware plays an important role in ensuring the operation, safe escape, security, environmental comfort and aesthetic of a building.8 considerations of configuration (Core a

    2018-07-13
  • Emergency Exit Doors Constructed According to The EN 1125

    Emergency exit doors constructed according to the EN 1125 Should provide a means of escape in panic situations – in –Clduing people who are not acquainted with the environment and handing of such doors. DIN EN1125 – PANIC EXIT DEVICES (BAR) The standard defines the requirements wi

    2015-12-09
  • BS EN1154-Door Closer

    DIN EN1154-DOOR CLOSER Door closers need to be tested /certified according to DIN EN1154 code system ,The standard classifies door closers by Menans of a 6 dirit coding system .The digits relate to a particularFeature of the product measured against the standard performance requirements Digit 1 &nd

    2015-12-09
  • BS EN 1906 Lever Handles and Knob Furniture

    BS EN 1906 Lever handles and knob furnitureBS EN 1906 classifies door furniture by using an 8 digit coding system .A similar classification applies to all building hardware productStandards so that complementary items of hardware can be specified to , for instance , a common level of corrosion resi

    2015-12-04
  • BS EN 1935 Single axis hinges

    1. Category of useOne category is identified. Grade 1For use by people with a high incentive to exercise care and with a small chance of mis-use.2. DurabilityThree grades are identified according to the number of test cycles achieved Grade 425 000 CyclesGrade 550 000 CyclesGrade 6100000 Cycles 3. Do

    2017-11-28
  • How to choose Door Scheduling (2) ?

    From the last article (How to choose Door Scheduling (1) ?), we learn about the factors, steps and Successive sequence of door scheduling. Now we continue to learn to choose Door Scheduling.

    2018-01-18
  • How to choose Door Scheduling (1) ?

    The door scheduling is suitable to the design which is belong to designer. The designers must have concept of design, and then find the door hardwares which meet the design's requirement of designers.

    2018-01-18
  • How to install door cylinder?

    Unlock and open the door.Locate on the edge of the door the screw securing the cylinder, (usually this will be a large headed screw in line with the lower end of the cylinder) - remove this screw.Next insert the key in the lock and turn it so that the cam lines up with the body of the cylinder which

    2018-04-11
  • Cylinders and Input Devices for Locks with ANSI/BHMA A156.5

    1. SCOPE1.1 ANSI/BHMA A156.5 establishes requirements for mechanical cylinders, electrified input devices, and push button mechanisms, which include operational and strength tests.1.2 Related products are covered in additional BHMA Publications: A156.25 ANSI/BHMA A156.28 for Master Keying Systems, a

    2017-12-20
  • How to Clean Brass Hinges

    Keeping brass hinges shiny and clean is very important. But over time, they might acquire a bit of grime or tarnish. Do you want to clean brass hinges by yourself? Now there are six ways which can help you clean them. 1. Wipe the brass hinge with soapy water.Mix hot water with a few drops of liquid

    2017-11-09
  • How Fire Rated Door Hardware protect Human Safety?

    we know that there is not a door hardware products are working alone, only the cooperation of each product to make the fire door work smoothly, and make comprehensive fire safety solutions for construction of buildings to prevent the happening of the tragedy at the most extent.

    2017-08-22
  • How to install door hinges on an interior door?

    Door hinges play an important role in door, making the door open or close easily. When you buy the hinges, maybe you have trouble in installing the door hinge. Now, there has easy way to let you know how to install door hinges.

    2017-12-21
  • ANSI and EN Hinge Comparison

    Hinges Standard: ANSI & EN American National Standard Institute (ANSI) ANSI 156.1ItemANSI 156.1 Cycle-testGrade 1-2,500,000Grade 2-1,500,000Grade 3-350,000Fire TestPass UL 10 C 3 hours fire testAnti-corrosionSalt Spray Test 200 hoursEuropean (EN) EN1935-2002ItemIndexDescriptionCategory of use1-

    2015-09-23
  • How to choose the right hinges for your door & project?

    When it comes to doors, hinges is very important. Their style and functionality have a huge effect on the performance of your doors. The good news is that a wide range of hinge options are available, so there's an excellent chance there's a hinge out there that's right for your application. SELECT T

    2018-04-19
  • Butts and Hinges with ANSI/BHMA A156.1

    1.S1.1 This Standard establishes requirements for lightweight, standard weight, heavy weight and detention hinges. Cycle tests, lateral and vertical wear tests, friction tests, strength tests, finish tests, and material and dimensional requirements are included.1.2 Tests described in this Standard a

    2017-12-20
  • How to Install a Closet Door Ball Catch?

    To allow your handle-less closet door to remain shut, you will want to install a closet door ball catch. Closet door ball catches come in many sizes and finishes. Choose the one that matches the style of your home.

    2018-05-04
  • EURO Mortise Locks- CE Certificate-BS EN 12209

    EURO Mortice locks- CE CertificateThe D&D 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.Features Stainless steel forend and strike pl

    2016-07-01
  • EURO Mortise Locks- CE Certificate

    BS EN12209 Building Hardware-mechanically operated locks, latches and locking plates. CE Certificate-BS EN 12209,240 Minutes Fire rated200 000 cycles Test D&D Manufacturer of CE Door Locks, 10 Years Guaranteed.

    2017-06-23
  • Panic Exit Devices BS EN 1125

    BS EN 1125 Panic Exit DevicesIt is desirable that the doors at final exits in public buildings,places of entertainment ,shops etc should be fitted with panic devices operated by a horizontal bar or touch bar .The emphasis for products covered by this standard is on safe exit rather than security . p

    2015-12-04
  • BS EN1303 Cylinders for locks

    1. Category of useOne category is identified. Grade 1For use by people with a high incentive to exercise care and with a small chance of mis-use.2. DurabilityThree grades are identified according to the number of test cycles achieved Grade 425 000 CyclesGrade 550 000 CyclesGrade 6100000 Cycles 3. Do

    2017-11-28
  • BS EN 12209 Building Hardware –Mechanically Operated Locks, Latch and Locking Plates

    BS EN 12209 Building Hardware –mechanically operated locks ,latchs and locking plates Digit 1-Category of use -grade 1:low frequency of use by people with a high incentive to exercise care and a small chance of misuse ,e.g.internal residential doors -grade 2:medium fre

    2015-12-04
  • Door Closer CE EN 1154

    Door Closers CE EN 1154Power Size Door Closer Power Size Recommended MaxDoor Width(mm) MaxTestDoor Mass kg 1 <750 20 2 850 40 3 950 60 4 1100 80 5 1250 100 6 1400 120 7 1600 160The power of

    2015-12-04
  • How to install door coordinator?

    1.Position the coordinator on outside of the top frame.

    2018-04-26
  • How to install a Peephole in door?

    Adding a viewer or peephole to your front door is a simple project. There are many styles and brands of door viewers to choose from, including models with up to a 200-degree viewing range, allowing you to see almost everything on the other side of the door. This guide provides step-by-step instructi

    2018-04-18
  • How to install door chain?

    Installing a door chain on your front door is a very easy and quick way to boost your home security. It will give you the peace of mind knowing if you’re home alone and someone calls to the door, you can safely open the door enough to check who it is.

    2018-03-28
  • How to install panic bar?

    A panic bar is a type of door hardware used to allow occupants to exit a building quickly during an emergency. This device features a horizontal bar or push pad that releases the door's locking mechanisms with a single action. Rather than twisting levers to struggling with thumb turns or knobs, occu

    2018-03-14
  • How to install glass door hinge?

    D&D Hardware Manufacture of high quality hardware for Wooden Doors, Metal Doors, Escape Doors,Fire Rated Doors,Single Fire Rated Flush Doors, Double Doors,Security Doors, Louver Steel Doors etc.Our products which include Panic Exit Device, Lever Handles, Mortise Locks, Lock Cylinder, Door Hinges, Do

    2018-03-22
  • Architectural Hardware Installation Guide

    Recommended hardware locations for hollow metal doors , Door Hardware location and floor conditions

    2017-09-22
  • How to install Door Bolt?

    Gather all the Things You'll Need.

    2018-02-28
  • How to install a mortise lock?

    It is quite straightforward to install a mortice lock to a wooden door but it does require accurate measurements and cutting so that the mortice lock and striker plate install correctly.

    2018-02-09
  • How to install Door Stopper?

    Step 1. Choose the location for your door stopYou can work out where to install your wall mounted door stop by holding the door stop against the wall and bringing the door close to it. Make sure that the door stop isn’t set too high or low. Also choose a position that isn’t too far away or close to

    2018-01-16
  • How to install a Door Handle?

    Step 1. Measure the height for the door handle

    2018-01-08
  • How to Install a Door Closer?

    If you're installing a new door or replacing a broken door knob, you may not know how to insert a door knob. But, while the parts of a door knob may seem complex at first, installing a new door knob can be a simple DIY project. You don't need to hire a home repairman to change or add a door knob. As

    2018-01-03
  • Composition Effects on The Magnetic Permeability of Austenitic Stainless Steels

    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

    2017-08-22
  • Is stainless steel 304 non-magnetic?

    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

    2017-08-22
  • CODE LIST SURFACE TREATMENT / FINISHES

    CODE LIST FOR SURFACE

    2017-12-15
  • Acceptable Quality Limit(AQL) Standard

    Quality StandardsWe use the internationally recognized Acceptable Quality Limit (AQL) standard for all product inspections. For each inspection, this allows the client to set their acceptable quality tolerance levels.Acceptable Quality Limit (AQL)D&D Inspectors exclusively use ISO 2859 tables to mea

    2017-12-20
  • Stainless Steel Materials

    The principle material used in D&D Hardware products is Stainless Steel. Other material such as brass, zinc alloy or other material are also used for specific site requirements or aesthetic reasons.D&D products are manufactured from a high corrosion resistant Chrome-Nickel Stainless Steel combinatio

    2017-12-15
  • ACCESS CONTROL SYSTEMS

    ACCESS CONTROL SYSTEMS Are classified under the same classifications as the doorhardware in/on which they are integrated .This means thatthe access control systems supplied by GBM Solutions isclassified according to EN1303 –cylinder for locks ,DINEN 18252 –locking cylinder for door locks

    2015-12-09
  • How to identify Stainless Steel 304 Grade or 316 Grade?

    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.1. CompositionThe first key difference between 304 grade stainless steel and 316 grade stainless steel relates to composition. Steels are classified in part based on chromium and alloy content and crystalline structure. Austenitic steel – also known as 300 series steel – contains 18% chromium and 8% nickel. This type of steel is incredibly common; about 70% of stainless steel products are composed of austenitic steel. 304 grade stainless steel is considered to be austenitic, while 316 grade

    2016-08-13
  • How to choose door hardware for wooden door?

    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.

    2017-09-13
  • Do you know the type of door hinges?

    In daily life, door hinges can be seen everywhere. There are many types of hinges. Do you know how to name it? Please follow us to see the main types. 1. Spring hingesA spring-loaded hinge made to provide assistance in the closing or opening of the hinge leaves. A spring is a component of a hinge, t

    2017-10-31
  • Auxiliary Hardware with ANSI/BHMA A156.16

    American National Standard Institute (ANSI) ANSI 156.16ItemANSI 156.16 Cycle-testGrade 1-500,000Grade 2-250,000Grade 3-100,000Fire TestPass UL 10 C 3 hours fire testAnti-corrosionSalt Spray Test 200 hours

    2017-12-22
  • How to install floor spring?

    Floor spring installation is not a simple job.It should be done by the skilled persons.Wrongly installation may cause noice,oil leaking or speed problems.The steps are as below:Preparation work: Choose the suitable floor spring according to the door weight and width.A: Decide the ground digging hole

    2018-03-10
  • Architecture Hardware for Metal Door

    Do you know metal door hardware? Maybe you know, but it is not incomplete. Now let us introduce the complete metal door hardware.

    2018-01-17
  • The Components of Steel Door

    The passage mainly tells you the components of steel door from four aspects. There are infill, door leaf, door frame and finish. Hoping you can get knowledge about steel door in here.

    2018-01-16
  • The Types of Steel Door

    When you buy Door Hardware, you should know your door. Here is different types of steel door.

    2018-01-16
  • The Structure Classification of Steel Door

    There are four structures classification of steel door in the article. We can learn about the form welding, paper card honeycomb, stiffened door and solid core.

    2018-01-17
  • What Is a Flag Hinge?

    A flag hinge is a piece of hardware used to allow movement of two pieces of material. They are commonly used on various types of doors to facilitate directional movement; the flag hinge itself is usually mounted on a vertical plane, thereby allowing horizontal movement of a door or other piece of ma

    2017-12-15
  • Different Product Rang of the Pinning Center

    The D&D pinning Center is staffed by factory trained technicians and isequipped with the latest computerized software and key cutting machinery FeaturesBS EN 1303-2005 performance testedQuality solid brass body and plug30 degree offset cam inhibits knock throughAnti pick key profile Large rang of k

    2015-12-04
  • Introduction Grade 3 Lever Handle

    Introduction Grade 3 Lever HandleD&D grade 3 level handle are suitable for high frequency of use by public or others with little incentive to exercise care and with a high chance of misuse , e.g.public office doors ,common area doors etc. FeaturesGrade 304 stainless Steel .Distinctive “Snap

    2015-12-04
  • Frequency of Door Usage and Standard for Lock

    Guidelines for frequency of door usage and standard for lock Build type Daily usage Yearly usageStandard for lock High frequency & Heavy weight door Large department store entrance 5,000 1,825,000 ANSI standard Lock Hospital corridor and surgical

    2015-09-04
  • Door Locks Standard

    Door Locks Standard ·American National Standard Institute(ANSI)·European(EN)·Australian Standard(AS)·CNACL China Local Fire Test Beauer Certificate CANCL to be satisfiedHardware-Cycle Test Product EN ANSILockset

    2015-09-03
  • Mortise Lock Components

    D&D Hardware Mortise Locks are meet EN12209,according to DIN 18250, 18251, suitable for commercial, industrial and prestigious residential projects and provide different functions to meet various applications.

    2015-07-20
  • How to fix blocked door locks?

    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.

    2017-08-28
  • How to choose Hinge for Door?

    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, t

    2017-10-11
  • How to choose Door Closer?

    Seven door mass /size grades and related door closer power sizes are identified according to BESEN 1154. Where a door closer provides a range size, both the minimum and the maximum sizes should be identified.

    2016-07-01
  • How to choose the Hinge?

    How to Choose the Hinge? 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)?

    2016-07-01
  • How to select correct Door Closer for Interior door?

    Choosing a door closer changes depending on many different factors including customer preference, manufacturer options, and building specifications. Other factors to consider include:

    2017-12-20
  • What should i consider when buying an Exterior Door Handle?

    When buying door handle, you need to pay attention to essential elements. The essential elements will help you to choose the right exterior door handle to fit your needs. As the most important feature of a door it can be the showpiece of the front of a home. It is a functional and beautiful for any door; however, the perfect front door handle can be difficult to locate. All in all, the right exterior door handle needs to be durable and elegant and needs to fit all of your home's needs.

    2017-12-07
  • Do you know how to choose your door handle?

    Choosing your door handles there are 4 things to consider. At the same time ,this might seem a little daunting, it isn’t if you follow the steps below. The important things you will need to consider are:1.The styleFirstly,consider what your overall theme is in the building you are choosing the handl

    2017-11-17
  • Global Door Closer Market 2017-2021

    The door closer market has been witnessing growth across regions due to the increasing awareness of high-tech security systems among various end-users and easy operations of such equipment. Also, there has been an impact in the market due to the deployment of smart solutions in the developed and dev

    2017-12-25
  • Mortise Locks with ANSI/BHMA A156.13

    1.SCOPE1.1 This Standard establishes performance requirements for Mortise Locks and Latches and includes operational, cycle, strength, material evaluation, security, and finish tests, and dimensional criteria. 1.2 Tests described in this Standard are performed under laboratory conditions. In actual

    2017-12-22
  • Global Door Hinge Market Report 2017

    Door Hinge MarketReport provides complete information about manufacturers, suppliers, distributors, traders, customers, investors and major types as well as applications. Door Hinge Market is segmented based on type, application, and region. The Door Hinge Market report provides an in-depth overview

    2017-12-21
  • Exit Devices with ANSI/BHMA A156.3

    1. SCOPE1.1 This standard establishes requirements for exit devices and trim, automatic and self-latching flush bolts, removable mullions, coordinators, and carry-open bars. Performance criteria include cycle, operational, strength, material evaluation, and finish tests. Functions and types are desc

    2017-12-20
  • Bored and Preassembled Locks and Latches with ANSI/BHMA A156.2

    ProductPerformance comparisonItemANSIEN LockCycle-testGrade 1-1,000,000200,000Grade 2-400,000Grade 3-200,000StandardANSI A156.13 Grade 1EN12209Function30-40 chosed5-7 chosedFire testPass UL 10 C 3 hours fire testChina fire test 1.5 hoursPass EN 1634 1 hour fire testChina fire test 1.5 hoursAnti

    2017-12-20
  • Door Controls-Closers with ANSI/BHMA A156.4

    1. SCOPE1.1 This Standard contains requirements for door closers surface mounted, concealed in the door, overhead concealed and concealed in the floor. Also included are pivots for floor closers. Criteria for conformance include cycle, operational, closing force and finish tests. Optional tests whic

    2017-12-20
  • Why Chinese New Year Affect your Business?

    Chinese New Year”, Also called the “Spring Festival”, is the most important festival in Mainland China , Hong Kong , Macao , Taiwan and Singapore . It’s the Christmas or Ramadan or Diwali of China only on a bigger bigger scale. The date is decided based on the lunar calendar , So the exact date vari

    2017-12-20
  • How to identify Factory or Trading Company?

    Trading Company or Factory?

    2015-03-26
  • Global Door Handle Market

    The report is mainly discussed the Global Door Handle Market for taking the export and import data as well as the present industry chain & growth and development of supply and demand of Door Handle into consideration. It estimates the manufacture capacity, properties of demand and supply, detail ana

    2017-11-24
  • Why your products could face shipping delays in China?

    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.

    2017-08-29

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:+86-139 2903 7292   David Jian

: +86-750- 3856396

 : sales@dndhardware.com 

:  No.4 Bldg, Street 33, West Gaoxin Rd, High-tech Zone, Jianghai Dist. Jiangmen City, Guangdong, China 

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