During the decoration, we will always encounter a variety of big things, such as the toilet kitchen, whether to lay the wooden floor, the floor is paved, there are always 1-2 pieces of the wrong or the wrong color, the floor is paved. After that, a certain position is always creaking. Today, let’s take a look at how to solve the problem that is always squeaking after the floor is paved.
First of all, if you want to know what caused it, you must first see how the sound is emitted. If a place slams on one foot and then slams again and again, it must be that there is no fixed between the wooden dragon and the ground raft, or the raft is too soft and not too hard to be pulled up by the dragon. To. If somewhere is stepped on, sometimes there will be sound, sometimes not. This kind of situation is mostly because the floor nail is smaller than the drill hole of the solid wood floor. The loose space between the male and female on the floor is related to the quality of the floor itself.
1. Before installing the ground dragon, it is generally used to punch holes with 12mm electric hammer drills. Then the wooden rafts should be at least 18-20mm square wooden rafts. It is not very easy to cut the holes. After a few days, the rafts are dry and shrink. That's it;
2. The material of the raft is harder than that of the earthen material, and the hard shrinkage force of the wood is small. It is not easy for the earthworm to pull the raft to keep it firm;
3. Some rooms have a height difference of several centimeters. At this time, the carpenter will put some knife-shaped cork or three-ply board under the ground dragon to ensure the level of the dragon. Don’t forget to raise the height 2.5. Between the dragons above the centimeters, it is necessary to fasten the short dragons to prevent the ground dragon from swinging and swaying to ensure that the ground dragon is flat and firm;
4. When installing solid wood floor drilling, the hole diameter must be smaller than the floor nail, so that the floor only eats nails;
5. A floor shrinkage joint of more than 1 cm is reserved around the wall to avoid climate change or the moisture content of the floor does not conform to the expansion arch, which is known to most people.
There are few ways to deal with the sound of the floor. Even after the treatment, the situation is slightly relieved, and it cannot be completely cured. One way to completely eradicate this problem is to retighten the ground dragon and reload the floor, but it is a laborious and costly headache. No one wants to rework and reload. Only before the installation of the ground dragon and the floor, as long as the installation master pays attention to some techniques and methods, it can prevent problems before they occur, and the floor will not make a sound.
Boiler Tube - for pressure equipment, used at higher temperatures
Standards and steel grades,
Tube sizes acc. to EN, DIN, BS, NF A, UNI, STN, ÄŒSN and PN-H standards,
Tube sizes acc. to GOST and TU standards,
Tube sizes acc. to ANSI standards,
Tube sizes acc. to ASME standards,
Precision tube sizes.
Boiler tube is made from heat resisting carbon and low alloyed steels which can withstand the load at high pressure and temperature. Boiler tube is used for parts of energy type equipment such as boilers, steam superheaters, steam pipelines, etc. The tubes are supplied as hot rolled or cold drawn. Specifications, dimensions and the steel grades are shown in a separate overview.
Boiler tube dimensions and tolerances
The tube dimensions range from 10.2 mm to 139.7 mm, from 26.9 mm diameter and the wall thickness from 2.6 mm and they supplied as hot rolled. The smaller diameter tubes and the thick wall tubes of larger diameters are supplied as cold drawn and subsequently they are heat treated. The tubes delivery in this condition happens only if there is an agreement upfront at the time of ordering the tubes. Based on an agreement it is possible to deliver boiler tubes with dimensions and tolerances according to the dimensional specifications for precision tubes. The tube dimensions meet the requirements of the following EN 10216-2, DIN 2448, BS 3059-1, BS 3059-2, BS 3602-1, BS 3604-1, NF A 49-211, NF A 49-213, UNI 4991, STN 42 5715, STN 42 5716, ÄŒSN 425715, ÄŒSN 42 5716, GOST 8732, PN-H 74252, ANSI B36.10, ASME B36.10. The detailed dimensional overview is shown in the tables according to EN, DIN, BS, NF A, UNI, STN, ÄŒSN and PN-H standards, GOST standards, TU standards, ANSI standards, ASME standards and standards for precision tubes.
Length of the boiler tube
Diameter (OD) [mm] Wall (WT) [mm] Length (L) [m]
OD < 60,3 5 – 6
OD => 60,3 WT < 7,1 5 – 6 or 10 – 14 after an agreement 22,4
WT => 7,1 5 – 6
Types of the length of supplied tubes: (a) random, (b) fixed ± 500 m, (c) exact + 15 / - 0 mm.
Boiler tube straightness
Straightness deviation for the whole length of a tube can not exceed value of 0.0015 x L. In conversion to the 1 meter length it can not exceed 3 mm.
Ends of the boiler tubes
The ends of the tubes are vertical to the longitudinal axis and are without burrs.
Condition of the tubes surface
The tubes condition corresponds to the requirements of appropriate standards, heat treatment to the way of tube manufacturing and chemical composition of steel.
Marking of the tubes and tube bundles
The tubes with the outside diameter up to 51 mm are marked with a label that is attached to the bundle. Larger tubes are marked at least at a one end of a tube by the necessary data.
Surface protection of the boiler tubes
While ordering, it is necessary to agree upon the way and means of temporary protecting the surface of the tubes during transportation and storing. The tubes may be supplied without temporary preservation of the surface, or with the preservation of the surface with an agreed upon preservative.
Packaging of the boiler tubes
The tubes are supplied in packages with a circular or hexagonal diameter with weight of 300 to 3500 kilograms. The tubes are bound with a steel band. It is possible to arrange wrapping to plastic sheet, burlap or to wooden crates.
Boiler Tube
Boiler Tube,High Pressure Boiler Tube,Stainless Steel Boiler Tube
YUHONG GROUP CO.,LIMITED , http://www.alloypipeline.com