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  • How to choose the fire rated door hardware?

    Fire has always been a hidden danger in our lives, so now many public places and families will be equipped with stainless steel fire doors, so that in the event of fire, we can better ensure the safety of our lives. Now let's get to know the characteristics of metal fire door and the selection guide

  • Architecture Hardware for Metal Door

    Metal doors, most commonly used in buildings, have changed from being used outdoors to being used indoors (instead of wooden doors). Hardware is the most important determinant of Metal Door Quality. Let's introduce the hardware commonly used for Metal Doors.

  • How Qualified D&D Team can assist customers find the Right Solution?-D&D Hardware

    In order to provide professional assistance to our customers to find the most suitable solution, we have product knowledge training every month. The trainer is a door hardware engineer with more than 12 years of work experience in the industry. ­­Through these trainings, our teams not only can bet

  • How to choose suitable door handles?

    hoose door handles according to local conditions

  • How to adjust a door hinge

    The door can be said to be very important furniture, every place needs to use the door, so, the door hinge is very important, if the door hinge damage or wear, the door will not be easy to open, next let me introduce you how to adjust a door hinge.Here is the content list:l How to adjust the pendan

  • Don't let inferior quality hardware hurt your door!

    Interior doors is anywhere in our daily life, they are used as building materials frequently, so the door hardware must strictly pass quality test. Consumers should pay more attention to the concept of green environmental protection, because there are many people choose and buy the aluminum alloy in

  • Interior wooden door hinge installation method

    Hinges, is an important part of the furniture, is related to function and service life of furniture. The specifications with function increasingly rich, the hinge is multifarious, but plus ca change or after installation to ensure that the products use safety and comfort. Let us know the butt door h

  • How To Choose The Right Metal Door Hardware Solution-D&D Hardware

    How do you choose Metal door hardware? Many people are confused with the choice of metal door ironmongery. Metal door hardware includes Door Hinges,Lever Handles, Mortise Locks, Pull plates,Door Closers,Panic Exit Devices, Flush Bolts, Door Stoppers, Sealing Strips and so on. The ironmongery for met


    D&D Hardware: ANSI Grade 1 Door Hinge ★ Tested to over 2,500,000 cycles = Durability ★UL Listed : 3 hours Fire Rated, Suitable for Fire/Smoke Resistant Doors ★ For Metal Doors, Fire rated Doors, Wooden Doors etc. ★ Suitable for Education, Healthcare, Hospitality and Commercial Applications.

  • Why Choose Stainless Steel 304 Door Locks?--D&D Hardware

    In front of the lock forms on the market, many consumers are confused; don't know how to choose the stainless steel door lock to be both safe and durable?From the material---Aluminum alloy door lock: The product material is mainly composed of a variety of metal elements, which is extremely easy to b

  • What are the Requirements for Fire Door Hinges?

    Fire doors are a very important safety feature of any building. Fire door require the use of high-quality fire protection hinge. So what are the requirements for high-quality fire-proof Hinges? 1.Heat ResistanceFire doors are generally heavy enough to provide the proper fire protection, and to ensur

  • The key to buying an indoor door lock - Pay attention to the lock cylinder, lock body!

    In modern home decoration, there are often some inconspicuous parts that play an important role. And we often overlook the importance of them, know that there is a problem, and everyone began to pay attention, then it was already late. Among them, there are indoor door locks that are often overlooke

  • 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-

  • 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

  • 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


    DATA SHEETSANSI/BHMA A156.1:2016AMERICAN NATIONAL STANDARD FORBUTTS AND HINGESModel: DDSS001- 4.5x4.5x4.6mm-4BBGrade: 1Hinge height: 4.5 InchesDoor Weight: 150 lbs DateCycle CountTech2018/06/280Fingal Zhang2018/07/10211,440Fingal Zhang2018/07/19460,147Fingal Zhang2018/07/30750,556Fingal

  • 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

  • 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

  • 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

  • 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 &ndash; in &ndash;Clduing people who are not acquainted with the environment and handing of such doors. DIN EN1125 &ndash; PANIC EXIT DEVICES (BAR) The standard defines the requirements wi

  • 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

  • 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.

  • BS EN 12209 Building Hardware –Mechanically Operated Locks, Latch and Locking Plates

    BS EN 12209 Building Hardware &ndash;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

  • 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

  • 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

  • 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.

  • 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.

  • 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

  • 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

  • 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

  • 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.

  • 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.

  • 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

  • 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

  • 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.

  • 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

  • How to install door coordinator?

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

  • 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

  • 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.

  • 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

  • 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

  • Architectural Hardware Installation Guide

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

  • How to install Door Bolt?

    Gather all the Things You'll Need.

  • 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.

  • 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

  • How to install a Door Handle?

    Step 1. Measure the height for the door handle

  • 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

  • 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

  • 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




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