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تنبيه هام حول قواعد المراسله في المدونه


بسم  الله  الرحمن  الرحيم  
mep,blogger,rules,قواعر  الاشتراك




اولا  احب  اشكر  كل  المهندسين الي بيثقوا في المدونه وبيتعاملوا  معاها  

من فتره بسيطه تم  اضافة  اداه للمراسلات  بحيث  ان اي  مهندس حابب  يراسلني   عن  طريقها  

((  موجوده   دايما اسفل الصفحه جهة  اليمين  )) 


يمكن استخدام  الاداه  لطلب  كتاب  او  دعم  فني  او  عرض  تصميم   

حتي  لو   في شغل محتاج مصمم  ليه ممكن   نعمله  

احنا مجموعه من المهندسين ان  شاء  الله نكون  علي قدر  الثقه دي 


لكن  في  الفتره  دي جت  لي  بعض  المراسلات الايميل  المرفق  فيها  به  خطأ فالبتالي   مقدرناش  نرد علي   الطلب  


برجاء  اي  حد محتاج اي  حاجه  يتأكد  من  الايميل  والبيانات   المرفقه  

شكرا   جزيلا 


فريق عمل  wiki mep 
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حمل اي كود من nfpa


بسم  الله  الرحمن  الرحيم 


nfpa,code,fore fighting ,مكافحة الحريق , mep


كتير  منا  بيحتاج  اكواد  الحريق   وفي  بعض الاكواد  صعب  لاقيها  علي الانترنت   طيب  nfpa   بتسمح   لينا  اننا   نقرأ  الاكواد  الي  احنا   محتاجينها  علي  الموقع   بتاعها :

طيب  السؤال   هل  في  طريقه   تقدر  تخلينا  نحمل  الكود  الي  احنا  محتاجينه   بدل  ما   بس  نقرا   اونلاين , ايوه  في طريقه  نتحايل بيها  علي  الموقع  نعالوا   نشوفها  سوا  

اولا  لازم  نستخدم  متصفح  google chrome    

ثانيا  ندخل  علي   موقع  nfpa    من  اللينك  ده  NFPA 

ثالثا  نختار  اي  كود احنا  عاوزينه  وليكن   nfpa  424   هنلاقي   لينك   فوق  في الصفحه   مكتوب  فيه  

nfpa,code,fore fighting ,مكافحة الحريق , mep
Free access to the 2018 edition of NFPA 424     وده  اخر  اصدار  من   الكود   2018
نضغط  عليه   هيفتح    لينا   صفحه  ممكن  نقرا   منها   الكود   ونتصفحه   زي  ما احنا  عاوزين  

طيب  انا  مش   عاوز  اقرا  انا  عاوز  انزله   اعمل  ايه   اولا  اظبط  ابعاد   الصفحه   الي  بقرا  منها  دي  اشدها   لتحت   علشان  اكبر  مساحة  القرايه  

nfpa,code,fore fighting ,مكافحة الحريق , mep

ثانيا   علي  الهيدر  الي  مكتوب  فيه  اسم  الكود   اعمل  right  click    هلاقي  كلمة    inspect
لما   اضغط عليها  google chrome  هيفتح  لي  صفحة  البرمجه  بتاعة  الصفحه   

ابحث  عن  كلمة   source   واضغط   عليها   بعد  كده  من  القايمه  علي الجانب  الايسر   اضغط علي  nfpa custom pages   هلاقي  الصفحات  الي  اتفحت  كلها   بمجرد   ما  اضغط  علي  الصفحه  هاتظهر  في  الجانب  الايمن
  
nfpa,code,fore fighting ,مكافحة الحريق , mep


اضغط   right  click    علي  الصوره   واعمل  save
nfpa,code,fore fighting ,مكافحة الحريق , mep



بعد  ما   اعمل save    لكل  الصفح     يجي  دور  اني  اجمع   الصفح   دي  في  كتاب  واحد  

وهنا  هانسنخدم   برنامج   acrobat  pro      

ممكن  تنزله   من  هنا   acrobat pro    

لما  افتح  البرنامج  هلاقي  combine  file   into pdf       اضغط عليها  واروح   علي  الفولدر  الي   save   قبل  كده   واختار  كل  الملفات   واعمل  combine     بكده   يجمع  كل  الملفات  في  فايل  واحد  
nfpa,code,fore fighting ,مكافحة الحريق , mep

nfpa,code,fore fighting ,مكافحة الحريق , mep


وبكده   اكون   نزلت  الكود   الي  انا   عاوزه  

مع   تحياتي   احمد  الجزار

لماشاهدة  الفيديو  حمل  اي  كود  من  nfpa  






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ASHRAE Standard 126-2016 Method of Testing HVAC Air Ducts

بسم الله  الرحمن الرحيم 

ASHRAE  Standard 126-2016


من اهم  الاعمال المسئول عنها مهندس الموقع في مجال  HVAC   هي الاختبارات  علي  دكتات الهواء  ومن اهم الاكواد  الي بتتكلم عن النقطه دي  SMACNA    و ASHRAE
ASHRAE,DUCT,FITTING,SMACNA,HVAC,MEP,STANDARD126







INTRODUCTION TO STANDARD 

First published in 2000, Standard 126 is a joint project of ASHRAE and the Sheet Metal and Air Conditioning Contractors’ National Association (SMACNA). It was created to provide

methods of testing to determine the strength and durability characteristics of HVAC ducts under various loading and environmental conditions. The intent of Standard 126 is to address all duct shapes and materials. To the project committee’s knowledge, no other publication addresses all of
the structural and durability tests as comprehensively as this standard, although individual tests are covered under other standards.
A standardized set of comprehensive tests is used to ensure that products meet minimum structural requirements, and to allow products to be compared to one another. Such tests should simulate structural stresses that the duct will experience in service and facilitate the application of safety
factors. These tests include pressurizing the ductwork, applying superimposed loads, dropping weighted implements for impact or puncture, applying tension to the duct, bending
flexible duct 180 degrees, subjecting the ductwork to temperature and humidity changes, and bursting or collapsing the duc twork under pressure. After an individual test or a series
of tests, leakage tests may be conducted to determine the effect of a structural or durability test on a specimen. During a test or series of tests, the ductwork is observed to determine
if there is degradation and permanent damage. Pass/fail criteria are determined by the sponsoring
agency, code officials, or other users of this standard. Recommended acceptance criteria are provided in Informative Annex C.


1. PURPOSE
This standard provides laboratory test procedures for the evaluation of HVAC air ducts.

2. SCOPE


2.1 This standard shall be used to determine the structural strength, dimensional stability, durability, and leakage characteristics of HVAC air ducts.

2.2 This standard does not address the following:
a. Fittings
b. Effects of aerosols, solid particulates, corrosive environments, or combustibility
c. Long-term effects of extended service
d. Seismic qualifications
e. Underground ducts
f. Plenums and equipment casings



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2016 ASHRAE Handbook—HVAC Systems and Equipment


بسم  الله  الرحمن الرحيم


ASHRAE,HVAC,SYSTEM,EQUIPMENT,HANDBOOK

مع  الاصدار  الاحدث   من

2016 ASHRAE Handbook—HVAC Systems and Equipment





مقدمة  الكتاب  

The 2016 ASHRAE Handbook—HVAC Systems and Equipment

discusses various systems and the equipment (components or

assemblies) they comprise, and describes features and differences.

This information helps system designers and operators in selecting

and using equipment. ASHRAE Technical Committees in each subject

area have reviewed all chapters and revised them as needed for

current technology and practice. An accompanying CD-ROM contains

all the volume’s chapters in both I-P and SI units.

Some of the volume’s revisions and additions are as follows:

Chapter 7, Combined Heat and Power Systems, has a new section

on economic evaluation and includes an update on EU Directive

2004/8/EC.

Chapter 9, Applied Heat Pump and Heat Recovery Systems, has

new content on waste heat recovery, district applications, and industrial

process heat pumps.

Chapter 12, District Heating and Cooling, has new content from

ASHRAE research project RP-1267 (the new District Heating

Guide and District Cooling Guide).

Chapter 18, Variable Refrigerant Flow, has new sections on modeling

and system commissioning, and an updated system design

example.

Chapter 19, Duct Construction, has extensive revisions on system

leakage and air dispersion systems.

Chapter 20, Room Air Distribution Equipment, has updates for

current technology, with new information on specialized components

and air curtains.

Chapter 21, Fans, has new sections on series fan operation and

field performance testing plus added content on fan and motor

efficiency grades and parallel multiple-fan operation.

Chapter 24, Desiccant Dehumidification and Pressure-Drying

Equipment, has expanded content on applications, air filters, and

liquid strainers, plus recommendations from ASHRAE research

project RP-1339 on rating equipment at altitude.

Chapter 25, Mechanical Dehumidifiers and Related Components,

has new content on psychrometrics, outdoor air, controls, and

industrial dehumidifiers.

Chapter 26, Air-to-Air Energy Recovery Equipment, has new information

on heat pipes and desiccant and heat wheel systems.

Chapter 28, Unit Ventilators, Unit Heaters, and Makeup Air

Units, has revisions on standards, controls, and fan selection for

makeup air units.

Chapter 29, Air Cleaners for Particulate Contaminants, has updates

on standards and performance testing.

Chapter 31, Automatic Fuel-Burning Systems, has added content

on pneumatically and electronically linked gas/air ratio burner

systems.

Chapter 33, Furnaces, has updates for current technology and efficiency

requirements.

Chapter 37, Solar Energy Equipment, has new data on worldwide

solar technology use, plus an expanded section on photovoltaic

equipment.

Chapter 38, Compressors, has revisions on general theory; screw

and scroll compressors; and bearings, including oil-free technologies.

Chapter 44, Centrifugal Pumps, has new content on vertical,

inline, split-coupled pumps; hydronic system pump selection; and

differential pressure control.

Chapter 45, Motors, Motor Controls, and Variable-Frequency

Drives, has new content on standards, bearing currents, and

permanent-magnet motors.

Chapter 47, Valves, has new content on control valve sizing; electronic

actuators; and ball, butterfly, flow-limiting, and pressureindependent

control valves.

Chapter 49, Unitary Air Conditioners and Heat Pumps, has a new

map of U.S. regional appliance efficiency standards.

Chapter 50, Room Air Conditioners and Packaged Terminal Air

Conditioners, has updates for efficiency standards.

Chapter 51, Thermal Storage, has new content on grid reliability,

renewable power integration, heat storage, emergency cooling,

water treatment, and commissioning.

This volume is published, as a bound print volume and in electronic

format on CD-ROM and online, in two editions: one using

inch-pound (I-P) units of measurement, the other using the International

System of Units (SI).



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كتاب Automatic Sprinkler Systems Handbook



بسم  الله  الرحمن  الرحيم


Automatic Sprinkler Systems Handbook



Automatic Sprinkler Systems Handbook

من اهم   انظمة  مكافحة الحريق   نظام  الاطفاء  بواسطة  الرشاشات  Sprinkler   والنظام  ده  بيتقسم  تقسيمات  كتير  حسب  التطبيق   يعني  بنلاقي

1-  النظام الرطب
2- النظام  الجاف
3- نظام الغمر  الكلي
4- النظام  سابق  التفعيل

ويمكن  اننا  نقسمه  حسب  نوع شبكة المواسير  فنلاقي

1- نظام  الشجره
2- نظام  grid
3- نظام  loop

ومن  اهم  مكونات  النظام  ده
1- مضخة الحريق
2-  محبس  الكنترول
3- شبكة المواسير
4- الرشاشات
5- مجموعة المحابس

من افضل  الكتب  الي بتشرح النظام  هو  الكتاب الي معانا النهارده  وهو  كتاب





Automatic Sprinkler Systems Handbook


Preface


The first automatic fire extinguishing system on record was
patented in England in 1723 and consisted of a cask of
water, a chamber of gunpowder, and a system of fuses. In
about 1852, the perforated pipe system represented the first
form of a sprinkler system used in the United States. In
1874, Henry S. Parmelee of New Haven, Connecticut,
patented the first practical automatic sprinkler.
C. J. H. Woodbury of the Boston Manufacturers Mutual
Fire Insurance Company and F. E. Cabot of the Boston
Board of Fire Underwriters completed a study on the performance
of sprinklers for the Factory Mutual Fire Insurance
Company in 1884. This study was the basis for the first
set of rules for the installation of automatic sprinkler systems
that were developed by John Wormald of the Mutual
Fire Insurance Corporation of Manchester, England, in
1885. In 1887, similar rules were prepared in the United
States by the Factory Improvement Committee of the New
England Insurance Exchange.
By 1895, the commercial growth and development of
sprinkler systems were so rapid that a number of different
installation rules had been adopted by various insurance organizations.
Within a few hundred miles of Boston, Massachusetts,
nine radically different standards for the size of
piping and sprinkler spacing were being used. This problem
led to the creation of NFPA 13 and the formation of the National
Fire Protection Association in 1896.
In many respects, the issues that led to the development
of the first edition of NFPA 13 are relevant today. The unprecedented
development of sprinkler system products, design
techniques, and installation practices over the past
several years is offering numerous options for effective system
design. While this increased flexibility provides numerous
advantages, it also requires more diligence by those
designing, installing, and approving sprinkler systems as the
rules for various system components become less uniform.
As has been the case for more than 100 years, the intent
of NFPA 13 is to provide a means for analyzing sprinkler
system information and presenting it in a form that will lead
to effective system designs and installations. This task continues
to become increasingly demanding as scientific and
other discoveries generate information at an increasingly accelerated
rate. In response to these challenges, in 1997
NFPA expanded the scope of NFPA 13 so that it became the
most comprehensive document addressing sprinkler systems.
NFPA 13 addresses sprinkler system installations for all
types of facilities regardless of the type of fire hazards present.
NFPA 13 contains sprinkler system design and installation
information from more than 40 NFPA codes and
standards.
As the scope of NFPA 13 has expanded, so has that of
the Automatic Sprinkler Systems Handbook. This 11th edition
includes new and updated commentary on the protection
of three new special storage arrangements in Chapter 20
and new shelf storage arrangements.
Other major changes in the 11th edition include revisions
to the density/area curves for the protection of storage
occupancies and the combining of large drop sprinkler and
the specific application control mode sprinkler information
and revising the terminology to now identify them as control
mode specific application sprinklers (CMSA).
In Chapter 9, a number of changes occurred regarding
sway bracing of sprinkler systems, including the introduction
of new zone of influence tables for Schedule 5 steel
pipe, CPVC, and Type M copper tube. The basis of the values
in these tables is described in a new Annex E.
To continue to correlate with SEI/ASCE 7-05, Minimum
Design Loads for Buildings and Other Structures,
NFPA 13 has adopted the SEI/ASCE approach to converting
strength design to allowable stress design, which is further
detailed in Chapter 9, Annex E, and the related commentary.
Other significant changes include those for calculating
the rack shelf area. In addition, the handbook includes updated
commentary on those portions of NFPA 13 that have
been revised. Also, there are three new supplements intended
to provide up-to-date information on sprinkler statistics,
new and on-going sprinkler system research, as well as
an international perspective on fire sprinkler technology and
installation experience. Another new supplement included in
this edition highlights the major code changes in NFPA 13

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Selecting Centrifugal Pumps



بسم  الله  الرحمن  الرحيم  Centrifugal Pumps,pump,ksb,npsh,flow rate,head



المضخات  الطاره المركزيه

تقربا مفيش  مهندس في اي مجال من  المجالات  الا وبيتعامل  معاها  فالبتالي  لازم  نعرف كل حاجه  عنها  سواء  اختيارها  ازاي

تركيبها   حسابات السيستم  الخاص  بيها

من  احسن الكتب  في المجال  ده   والي عاملها  شركه محترمه من  الشركات  العامله في  تصنيع المضخات  KSB

الكتاب بيتناول  شرح  مبسط  عن  المضخات  وانواعها  في  الاول  
بعد كده بيفصل في الشرح عن  المضخات الطارده المركزيه
بيشرح  طرق  التوصيل  التوالي  والتوازي  وبينبه علي  بعض  الاخطاء الشائعه في  التوصيل
بيشرح حساب  فقط الضغط في  السيستم

حسابات npsh
حسابات  base  force
وغيرها  كتير  من المواضيع
intro of book  


Typical selection criteria for centrifugal pumps are their design data (flow rate or capacity Q, discharge head H, speed of rotation n and NPSH), the properties of the fluid pumped, the application, the place of installation and the applicable regulations, specifications, laws and codes. KSB offers a broad range of pump types to meet the most varied requirements. Main design features for
classification are: – the number of stages (singlestage / multistage),
– the position of the shaft (horizontal/ vertical),
– the pump casing (radial, e. g.volute casing / axial, e. g.tubular casing),
– the number of impeller entries(single entry / double entry),
– the type of motor (dry motor/ dry rotor motor, e. g. submerged motor / wet rotormotor, e. g. canned motor,submersible motor).
These features usually determine what a pump type or series looks like


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Selecting Centrifugal Pumps

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