Accessory Testing for Fully Condensing Horizontal Oil (Gas) Steam Boilers

Fully condensing horizontal oil (gas) steam boiler accessories need to be tested before they can be put into use. The accessories of fully condensing horizontal oil (gas) steam boilers that need to be tested or experimented with are pressure gauges, pressure piping, safety valves, and boiler body hydrostatic testing. In Dongguan, fully condensing horizontal oil (gas) steam boiler

In Dongguan, fully condensing horizontal oil (gas) steam boiler accessories testing can refer to the Dongguan Special Equipment Testing Institute's safety accessory calibration room guide.

(1) fully condensing horizontal oil (gas) steam boiler pressure gauge test:

For the working pressure of less than 2.45MPa fully condensing horizontal oil (gas) steam boiler, the boiler pressure gauge accuracy of not less than 2.5 level, and by the measurement of the department to recalibrate, qualified before installation. Fully condensing horizontal oil (gas) steam boiler pressure gauge safety inspection: pressure gauge is the correct indication of boiler steam pressure

Small instrumentation, mainly used in steam boilers and pressurized hot water boilers, the accuracy of the pressure gauge itself and the correctness of the installation of the boiler's safe operation, to avoid major accidents play a key role.

(2) Fully condensing horizontal oil (gas) steam boiler pressure pipe inspection:

Fully condensing horizontal oil (gas) steam boiler elbows, tees, reducers, plugs, flanges and other surface defects and deviations in size should be in line with the current national manufacturing standards promulgated by the state, and in accordance with the design requirements, to identify and check the applicable nominal diameter and nominal pressure. Threads of screws and nuts for pipe connection should be complete, free of injury, burr and other defects.

The threads of screws and nuts used for connection of pipe fittings should be complete, free of scars, burrs and other defects. Pipe fittings used in various gaskets to meet the requirements. After passing the self-inspection, the materials shall be reported to the supervisory unit, and the pressure piping installation shall be carried out only after the supervisor passes the inspection.

(3) fully condensing horizontal oil (gas) steam boiler valve detection:

Piping valve types, specifications, models, working pressure should be selected according to the requirements of the design. Each fully condensing horizontal oil (gas) steam boiler should be installed at least two safety valves, including the drum and superheater safety valve. In addition, at the outlet of the reheater, as well as DC boiler external start-up (vapor) separator

In addition, safety valves are required at the outlet of the reheater and at the external starter (vapor separator) of the DC boiler; in the DC steam boiler superheated steam system, safety valves are required before the shut-off valves of the connecting piping between the two stages. Fully condensing horizontal oil (gas) steam boiler valves should be product certification, inspection reports, should be done on-site inspection, the main control valve should be 100% to do strength tightness test, non-main control valve should be sampled 5% to do the test.

The main control valve should be sampling 5% test, strength test pressure for the nominal pressure of 1.5 times the tightness test pressure for the working pressure, and make a good record of the test. Valve strength tightness test should be carried out on a specialized test bench.

Standard requirements for safety valves: TSG ZF001-2006 "Safety Valve Safety Technology Supervision Regulations", TSG G0001-2012 "Boiler Safety Technology Supervision Regulations", GB/T12241-2005 "General Requirements for Safety Valves", GB/T12243-2005 "Spring Direct Load Safety Valves".

(4) fully condensing horizontal oil (gas) steam boiler body hydraulic test

Fully condensing horizontal oil (gas) steam boiler collector box after cleaning up the dirt, closed manhole, hand hole, check the boiler body piping, valves, there is no leakage of gaskets, leakage of the installation of bolts and not tightened and other phenomena. Docking sewage valve, water valve, safety valve pipeline should be closed blind, and in the highest pipe seat of the blind plate

Install a bleeder valve on the highest pipe seat, the length of the bleeder pipe should exceed the protective shell of the boiler. Install two tested pressure gauges. Report to the supervisory unit and Party A, after the approval of the Technical Supervision Bureau for acceptance.

Fully condensing horizontal oil (gas) steam boiler accessory testing specific reference to the safety accessory laboratory guide ——;

1、 Processing the required information

1.1, in the window for inspection, boiler safety valves and rated pressure over 0.90MPa above the pressure vessel safety valve inspection, you need to provide the use of the boiler or pressure vessel registration code.

1.2. For inspection of new rubber hose or metal hose, it is necessary to provide the factory number and a copy of the certificate of product conformity.

2、 Processing procedures

2.1, business acceptance

2.2.1 inspection unit to fill out the "inspection acceptance form", signed by the inspector.

2.2.2 window acceptance of the information provided by the staff to verify, check the appearance of safety accessories and inspection of the quality of the main technical indicators, to determine whether the inspected safety accessories meet the test requirements. Where it does not meet the inspection requirements, returned to the customer, and explain the reasons to the customer.

2.2 Payment

2.2.1. Customers sending safety valves for inspection should pay the fee by credit card at the fee window of Safety Accessory Calibration Laboratory (Tuen Village, Liaobu Town) with UnionPay card.

2.2.2, the customer requires on-site calibration of safety valves, you need to sign the "on-site calibration agreement", and according to the agreement on the amount of payment within 10 working days to the bank account payment part of the designated account, the agreement on the part of the bank payment to the charge window of the room to pay by credit card.

2.2.3, report the inspection of speed limiters, rubber hoses or metal pipes, you need to take the UnionPay card to the Special Inspection Branch (Municipal Bureau of Quality Supervision compound) charge window card payment.

3、 Inspection report

3.1, safety accessories calibration completed within three working days, calibration of qualified safety accessories hanging qualified and sealed, out of the inspection report. Calibration failed safety accessories, not listed without sealing, out of the unqualified report.

3.2, the inspection report in duplicate, a copy to the customer, a copy of my office archives.

4、Pick up safety accessories and reports

4.1, the customer with the "test acceptance form" customer coupling, payment vouchers and the recipient's valid ID, fill out the window to receive the registration form, you can get the safety accessories and reports.

5, contact person and contact information

Inspection Contact: Mr. Zhang

Window Contact: Ms. Yao (fees), Ms. Lai (acceptance), Ms. Zhuo (issued).

Tel: 0769-23061891, 23061892; 0769-23061893 (fax) 

Contact Address: Liaobu Town, Dongguan City, Guangdong Province, Xiangyuan East Road, the middle of the Tuen Village