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Technical Resources


Which factors need to consider when choose Hinges


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.


                                                                                                                                                                                                    


CE EN12209 Mortice Locks
 

D&D DIN architectural range of Locks and latches designed to support the entire D&D range of levers, knobs and other unsprung furniture.The range is suitable for general commercial and heavy industrial use.

 

Offering complementary build quality, design integrity, and choice of external finishes, D&D gurantees the perfect match between form and function whenever you specify D&D architectural ironmongery. With fire safety and security in mind, D&D have design this series.Solid stainless steel latchbolts, deadbolts, followers, forend and strike plates provide enhanced durability and security.

 

Rebate conversion are available to allow locks to be fitted in most rebated door sections.

 

●Stainless steel forend and strike plate.
 

●Reversible latchbolt.
 

●Solid stainless steel spindle follower.
 

●Flush fitting case rivets and screws.
 

●Solid stainless steel deadbolt.



D&D door lock


BS EN12209 Building Hardware-mechanically operated locks, latches and locking plates.
 




EN standard lockcase
European standard for door lock products technology and its corresponding specification EN12209 for reference
 
All the European standard door lock technical parameters by the following 11 digital display
1 2 3 4 5
Category of use Durability and load
On latch bolt
Door mass and closing force Suitability for use on fire doors Safety
 
6 7 8 9 10 11
Corrosion resistance and temperature Security and drill resistance Field of door application Type of key operation and locking Type of spindle operation Key identification
 
2 H 5 1 0 E 5 A F 2 C


This indicates a mechanically operated lock and locking plate for use in an application where people have an incentive to exercise care, able to withstand a durability of 200000 cycles with a 10 N load on the latch bolt, on a door with a mass of up to 200kg and a max. closing force of 25N, suitable for use on a fire resisting door assembly, no safety requirement, moderate corrosion resistance in temperatures ranging from -20 to 80,with high security and drill resistance for use in any mortise application, with a manual locking lever lock or latch, unspring lever handle operation, a minimum of five deadlocking elements and an extended number of effective differs.




Guidelines for frequency of door usage and standard for lock
 
Build type Daily usage Yearly usage Standard for lock
High frequency & Heavy weight door
Large department store entrance 5,000 1,825,000  
 
 
ANSI standard
Hospital corridor and surgical doors 5,000 1,825,000
Large office building entrance 4,000 1,426,000
School entrance 1,250 456,250
School toilet door 1,250 456,250
Office stairwell 500 182,500
Office building toilet door 400 146,000
Medium frequency & Medium weight door
School corridor door 100 36,500  
 
EN standard
Hospital consultation room 100 36,500
Office building corridor door 80 29,200
Store toilet door 60 21,900
Storage room 50 18,250

                                                                                                                                                                                                                         


Acceptable Quality Limit(AQL) Standard

Quality Standards
We 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 measure AQL. These tables are a United States standard with equivalents in all national  and  international standardization organizations (ANSI/ASQC Z1.4, NF06-022, BS 6001, DIN 40080).
The Acceptable Quality Limit, commonly referred to as AQL, is a method widely used to measure a production order sample to find whether or not the entire product order has met the client's specifications. The customer then has the data to make an informed decision to accept or reject the goods.
Your inspection report will clearly state if your production has passed or failed your selected AQL.

How do I determine the right sample size and acceptance number?
Our trained account managers will be available to ensure you choose the inspection and AQL that is correct for your needs.
For a hypothetical inspection of a production with 4,000 units, with an Acceptable Quality Limit of II, Table A indicates a general inspection level of "L".
Referring to Table B row L. For a sample size of 200, with an AQL of 2.5, no more than 10 units may fail for a passed report.
 


 

Contact Info

:+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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