Metal door and window acceptance method
Metal doors and windows, including various series of aluminum alloy doors and windows, metal soundproof doors, stainless steel and titanium plated doors and metal package door installation projects, acceptance should pay attention to the following aspects.
(1) Guarantee items
The varieties, specifications, and quality of metal doors and windows, soundproof doors, and their accessories and glass must meet the design requirements and the current national standards.
The position of the metal doors and windows, the position of the soundproof door, the direction of the opening and the soundproof door must meet the design requirements.
Inspection methods: observation, test and inspection.
Metal window frames must be securely installed. The number, location, method of embedment, and corrosion protection of pre-embedded parts must meet design requirements.
Corrosion prevention shall be done between the aluminum alloy doors and windows and the non-stainless steel fastener contact surface. The soundproof door seal is installed in the correct position and the fan frame is tightly closed.
Inspection methods: Observe and inspect the hidden project records.
(2) Basic items
Metal window sash installation should meet the following requirements.
Swing door and window sash:
Qualified: Closely closed, substantially uniform gap, and flexible switching.
Excellent: Closely closed, uniform gap, and flexible switch.
Sliding doors and windows:
Qualified: closed and tight, the gap is basically uniform, the amount of overlap between the fan and the box is not less than 80% of the design requirement, and the pushing and pulling is flexible.
Excellent: Closely closed, evenly spaced, the amount of overlap between the fan and the box meets the design requirements, pushing and pulling is flexible.
Spring door leaf
Qualified: automatic positioning is accurate, the opening angle is 90 degrees plus or minus 3 degrees, and the closing time is within 6-10 seconds.
Excellent: automatic position accuracy, opening angle of 90 degrees plus or minus 1.5 degrees, closing time in the range of 6 to 10 seconds.
Metal door and window accessory installation should meet the following requirements:
Qualified: The accessories are complete, the installation position is correct and firm, flexible and applicable, reaching their respective functions.
Excellent: The accessories are complete, the installation position is correct and firm, flexible and applicable, to achieve their respective functions, good-looking appearance without pollution, sound insulation function should reach the sound insulation index.
The quality of gap filling between metal window frames and walls shall comply with the following provisions:
Qualified: fill full, fill material meets design requirements.
Excellent: Full and dense filling, smooth and smooth surface, no cracks, stuffing materials and methods meet the design requirements.
The appearance quality of metal doors and windows should meet the following requirements:
Qualified: clean surface, uniform color, no scratches, bumps, rust free edges, fly burrs, corrosion marks, and other stains. The gluing surface is smooth and free of bubbles.
Excellent: clean surface, uniform color, seamless seam joint, no scratches, bumps, no rust, no flash, burrs, corrosion marks and other stains, smooth surface coating, uniform thickness, uniform thickness No bubbles.
Aluminum shutter doors and windows should meet the following requirements.
Qualified: Satisfy the windproof function; no damage to the surface, uniform color, correct dimensions and specifications, flexible switch; hardware components are fully assembled and firm.
Excellent: Satisfy the windproof function; the surface is clean without damage, no scratches, the same color; the size specification meets the design requirements, the switch is flexible; the hardware components are fully assembled and firm, beautiful.
Inspection method: Observe and inspect, open and close the door and window sash to open and close the inspection, push and pull the door and window sash to check with the depth ruler, and check the spring door leaf with stopwatch and angle ruler.
Door and window acceptance window switch aluminum alloy stainless steel glass shutter window glass sliding door glass door
The commonly used Pipette kits are mainly composed of a pipette and a pipette tip. The pipette tip is a single empty
Cavity reservoir; the pipette uses the principle of air displacement and controls the maximum displacement of the piston by rotating a screw with an ultra-fine thread
displacement, and then control the amount of liquid suction. There are the following problems when using the above kit for suction: 1. The suction volume is controlled by the pipette
After the pipette is sterilized or used for a period of time, it is easy to cause "hidden" failures, which cause the operator to be difficult to detect.
The actual suction volume is inaccurate, and it needs to be adjusted frequently, and the operation is cumbersome and time-consuming; 2. To improve the pipetting accuracy, the operator's
The operation requirements are high, and it is easily affected by factors such as the suction speed, the depth of the tip below the liquid level, and the inclination angle of the pipette.
The actual suction volume will be heard; 3. The actual suction volume will be affected because the suction head cover is not tight and leaking, and it will not be easily detected; 4.
When performing experiments that require high accuracy, such as analysis, in the operation of equal volume aspiration of liquids with different densities, the actual
The actual suction volume will be affected by the density itself; 5. In order to improve the accuracy, this type of pipette needs to carry out high
Cost-optimized design results in extremely high pipette costs.
1000 ul pipette tips,200ul pipette tips,10ul pipette tips,low retention pipette tips
Yong Yue Medical Technology(Kunshan) Co.,Ltd , https://www.yypcrtube.com