SECTION 11612- ALTERNATE - WELDING FUME EXHAUST SYSTEM PART 1 GENERAL 1.01

SUMMARY A.

1.02

Section Includes: 1. Welding fume exhaust system

WELDING FUME EXHAUST SYSTEM GENERAL DESIGN REQUIREMENTS A.

The following specifications are based on the Lincoln Electric Company Fume Extractions System. Equal products and systems that meet these specifications may be submitted.

Quantity

Product Number

Product Description

18

K1655-7

LTA 2.0-CW Wall mounted telescopic articulating fume extraction arm with 360 deg. Rotating hood. The working radius ranges from 3’ to 7’. Spring balance and counterweight allow arm to maintain position. Adjustable throttling valve is in hood.

18

S23385-41

MANUAL DAMPER, MD200MM The manual damper is used to balance the air flow at each fume extraction arm. It is located between the arm and the duct main. The damper is made from galvanized steel, and is 200mm in diameter with EPDM rubber seal.

1

M18464-10

SF20000RI, 22KW EXTRACTION FAN, RIGHT Mechanical Specifications: Fan housing Steel with alum. Profiles Dimensions WxLXH 1400X1400X1300mm Weight 400Kg Inlet/Outlet dims. 630mm/630mm Fan type Radial Fan speed 2850 rpm Sound absorbing case 10dBA sound reduction Frame type SF 20000 Performance 10,500 cfm @ 10” w.c. Electrical Specifications Motor Design Voltage Insulation class Protection class Power Nominal current

IEC 132 (WEG) 400-690V/3ph/50Hz F with PTC IP 55 22KW (30HP) 38.7 A @ 460V

1

AD1283-45

POWERFLEX 400, 30HP, 47 A, IP54VFD The variable frequency drive (VFD) regulates the fan input voltage based on either a differential pressure signal or a signal form the IP-15 control box. UL listed to UL508C, NEMA ICS 3.1, IEC 146. Electrical Specifications: Voltage Tolerance 200-240V+or- 10% 380-480V +or- 10% Frequency Tolerance 48-63 Hz Input phases 3 phase = full rating. Derate for single phase. Displacement pf 0.98 across entire speed range. Efficiency 97.5% @ rate amps, nominal line voltage. Environment: Altitude Air Temp Humidity

3300ft without de-rating IP20, NEMA/UL type open = -10 to 50 deg C. 0-95% non condensing

2

L10393-2

STATIFLEX 6000-MS W/INLET & CONTROLS Low vacuum/high volume filtration unit w/auto cleaning system powered by compressed air. This filter system houses (2) filters available win Merv 13 or Merv 16 efficiencies. Specifics: Compressed Air 6 SCFM @90-105 psi w/80 gal. tank, 24hrs CA quality ISO 8573-1 Class 6 Voltage Input 115V/1ph/50-60Hz Power 50W Current 2A Inlet Dim. 15 11/16”ID Outlet Dim. 15 11/16”OD Max. Op. Temp 140 deg F Max. Humidity 75% Dust Bin cap. 24.5 gal Filter area 2 x 807 ft2 Weight 550 lbs. Max airflow 6000 cfm

2

M18440-1

PRESEPARATOR FOR STATIFLEX 6000-MS Baffle system that separates large particles from air stream prior to air reaching the main filter. The inlet is 25” and the outlet is 16”. Pre-separator has is own dust bin to keep potential large hot embers from entering the main filter.

1

S23281-44

SILENCER, 90 DEG. ELBO, SAS 630 Dual walled, inline 90 deg. elbow duct silencer. O.D is 29”, I.D is 24”. The sound reduction is 12 dBA. Duct connection inserts included.

1

AD1389-2

ENV, PRESSURE DIFFERENTAIL KIT This system monitors the saturation level of the filter cartridges and adjusts the air volume rate based on a predetermined setpoint. As the filter cartridges become saturated, the controller adjusts the fan speed to maintain the required air volume determined by the air volume setpoint.

1

K1653-2

MOBIFLEX 200-M PORTABLE FILTRATION PKG.

The Mobiflex filtration package includes a 10’ LFA 3.1 extraction arm, that is spring balanced and counterweight to allow arm to maintain position. Includes disposable cellulose filter and 19ft input power cord Electrical Specifications Voltage input 115V/1ph/60Hz

A.

GALVANIZED STEEL DUCT WORK Furnish and install associated galvanized steel duct work to provide a completely engineered duct system with a balanced amount of airflow to each work station. The ductwork shall be designed in accordance with Industrial Ventilation A Manual of Recommended Practice For Design by ACGIH and designed and installed in accordance with Accepted Industry Practice for Industrial Duct Construction by SMACNA.

1.01

QUALITY ASSURANCE A.

Single source responsibility: Welding Fume Exhaust System equipment and accessories shall be manufactured and furnished by a single manufacturer.

B.

Manufacturer’s qualifications: Modern plant with proper tolls, dies, fixtures and skilled workmen to produce high quality equipment; and shall meet the following minimum requirements: 1. Five years or more experience in the manufacture of welding exhaust systems and equipment of type specific. 2. Ten installations of equal or larger size and requirements. Provide contact at each.

B.

Installer’s qualifications: Factory certified by the manufacturer. Provide outline of certification program

1.02

DELIVERY, STORAGE AND HANDLING A.

Schedule delivery of equipment so that spaces are sufficiently complete that equipment can be installed immediately following delivery.

B.

Protect finished surfaces from soiling or damage during handling and installation. Keep covered with protective coating. Unless written permission is obtained from manufacturer, equipment is to be stored “in-doors” until time of installation.

PART 2 2.01

MANUFACTURER A.

Design, materials, construction, and finish of welding extraction system specified, is the minimum acceptable standard of quality.

B.

Manufacturers, subject to comply with requirements for the welding extraction system, are approved for bidding, provided they meet the contract document specifications, include the following: 1. Lincoln Electric or equivalent

PART 3 3.01

3.02

PRODUCTS

EXECUTION

INSTALLATION A.

Installation: 1. Install welding fume extraction system and equipment in accordance with the manufacturer’s instructions. 2. Install equipment plumb, square, and straight with no distortion and securely anchored as required. 3. Secure equipment components with material and procedures recommended by the manufacturer. 4. Install ductwork in accordance with Accepted Industry Practice for Industrial Duct Construction by SMACNA.

B.

Accessory installation: Install all accessories and fittings in accordance with manufacturer’s recommendations.

FIELD QUALITY CONTROL TESTING OF WELDING FUME EXTRACTION SYSTEM A.

Field testing requirements: 1. Perform tests in field to verify proper operation of the system before they are put in use, using only qualified personnel. 2. Correct any unsafe conditions disclosed by these tests before request of test procedures. 3. Commissioning and balancing of the fan, VFD, and fume extraction arms shall be completed by a Lincoln Electric service technician.

3.03

3.04

ADJUSTING A.

Repair or remove and replace defective work, as directed by Architect (G.C., or entity in charge of the project) upon completion of installation.

B.

Adjust fixtures, accessories and other moving or operating parts to function smoothly.

CLEANING A.

3.05

Clean equipment, touch up as required.

PROTECTION OF FINISHED WORK A.

Provide all necessary protective measures to prevent exposure of equipment to other construction activity.

B.

Advise contractor, of procedures and precautions, for protections of material and installed system, from damage by work of other trades.

END OF SECTION