※ Product name：Fluorine lined elbow
※ Flange standard：HG/T 20592
※ Nominal pressure：PN10 PN16 CL150
※ Lining standard：HG /T 20538-2016
※ Lining material：PTFE、PO
※ Non-standard parts can be specially processed according to drawings
First, product overview
Steel lining polytetrafluoroethylene lining elbow is produced by molding process, the whole one molding, high density, reliable quality, and polytetrafluoroethylene lining straight pipe supporting use, has the same corrosion resistance, interchangeability, good versatility. A good PTFE resin is selected through reasonable formula, and the fluorine plastic is hot fused with the steel tube matrix by integral molding. Make the whole fluorine-lined pipe fittings have the following characteristics:
1, the use of high temperature: under the condition of strong corrosive medium, can meet the use of temperature range -60℃ ~ 200℃, in this temperature range (in addition to molten alkali metals, elemental fluorine and aromatic hydrocarbons), can meet all chemical media.
2, vacuum resistance: in the range of -60℃ ~ 150℃, can be used in vacuum conditions, in chemical production, often due to cooling, longitudinal discharge, pump valve is not synchronous operation of the local vacuum state.
3, high pressure resistance: in the range of temperature, can withstand up to 3Mpa use pressure.
4, anti-permeability: the selection of high quality resin, through the advanced lining process into high density, enough thickness of PTFE lining layer, so that the product has superior permeability resistance.
5, the integral molding sintering process lining, solve the problem of steel lining fluorine hot and cold expansion, so that it can achieve synchronous expansion.
6, the use of standardized size preparation, especially the chemical pipeline used in the pipeline, pipe fittings have a strong interchangeability, for the installation of spare parts to provide great convenience.
Second, PTFE lining layer test, inspection
1, pipe and pipe fittings are 1.5 times the design pressure for hydraulic test
2, where the PTFE lining layer is involved in the water pressure test,100% of the integrity of the test, the leakage point test method using electrical discharge test.
Third, maintenance and precautions before use
1, shall not be stored in the open for a long time, avoid the sun, rain, avoid violent collision, multi-layer stacking heavy pile pressure.
2. The sealing surface is not allowed to scrape, cut, scratch, scratch or collide with hard objects.
3. Welding, wind cutting and fire roasting are not allowed on the steel body of pipe fittings and fittings after lining, which should be separated from the heat source by more than 1 meter.


Main connection size
Connection size information unit：mm

Nominal diameter DN	90 degree bend H	45 degree bend H	Flange spacing Фd			Screw hole n*k
			0.6MPa	1.0MPa	1.6MPa	0.6MPa	1.0MPa	1.6MPa
25	90	65	75	85	85	4-Ф11	4-Ф14	4-Ф14
32	100	65	90	100	100	4-Ф14	4-Ф18	4-Ф18
40	110	70	100	110	110	4-Ф14	4-Ф18	4-Ф18
50	120	70	110	125	125	4-Ф14	4-Ф18	4-Ф18
65	130	85	130	145	145	4-Ф14	8-Ф18	8-Ф18
80	140	85	150	160	160	4-Ф18	8-Ф18	8-Ф18
100	150	105	170	180	180	4-Ф18	8-Ф18	8-Ф18
125	180	115	200	210	210	8-Ф18	8-Ф18	8-Ф18
150	230	130	225	240	240	8-Ф18	8-Ф22	8-Ф22
200	280	160	280	295	295	8-Ф18	8-Ф22	12-Ф22
250	380	200	335	350	355	12-Ф18	12-Ф22	12-Ф26
300	440	230	395	400	410	12-Ф22	12-Ф22	12-Ф26
350	535		445	460	470	12-Ф22	16-Ф22	16-Ф26
400	590		495	515	525	16-Ф22	16-Ф26	16-Ф30