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XIan Longjoy Foreign Trade Co.,Ltd
XIan Longjoy Foreign Trade Co.,Ltd
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XIan Longjoy Foreign Trade Co.,Ltd Quality Info

XIan Longjoy Foreign Trade Co.,Ltd
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Quality Control

Process Flow


The production process of pipe fittings mainly includes forming, heat treatment, bevelling, surface treatment, non-destructive testing, marking, packing.

Different pipe fittings have different forming methods.

Seamless pipe fittings are pipe cutting. The process flow is cutting, bulge-forming, end-cutting, heat treatment, bevelling, surface treatment, non-destructive testing, marking, packing.

Welded pipe fittings are plate cutting. The process flow is cutting, press-forming, trimming, welding, bevelling, surface treatment, non-destructive testing, marking, packing.

Ductile cast iron pipe fittings are casting. The process flow is pre-expand beads, model shaping, bond&model form, coat painting, model lay box, molten iron melting, nodular treat ment, pouring, polish&clean, zinc paint spray, mechanical machining, hydraulic press test, cement lining, bituminous paint externally, finished products packing.

(Carbon steel elbow)

(Alloy elbow)

(Push process)

Quality Control


Quality inspection includes non-destructive test, hydraulic test, tensile test, hardness test, dimensions check, super sonic wave thickness measure, lining thickness measure, coat thickness measure.

The pipe and plate used for the pipe fittings should be selected according to the material characteristics and the shape of the blank used in the product. The shape, size, and other requirements of the blank are based on the process regulations of different products.

Inspection of heat treatment is generally done through hardness test.

Non-destructive testing of pipe fittings in accordance with order requirements or clear provisions of standards.

(Surface painting treatment)

(Socket weld cross)

(Ductile iron elbow)

Certifications

XIan Longjoy Foreign Trade Co.,Ltd Certifications
Standard: CQC certification
Number: 00111E20697R2L/4419
Issue Date: 2019-01-16
Expiry Date: 2022-12-15
Scope/Range: Steel pipe, pipe fitting
Issued By: CQC China Quality Certification Center
XIan Longjoy Foreign Trade Co.,Ltd Certifications
Standard: API-5CT certification
Number: 5CT-0480
Issue Date: 2017-12-09
Expiry Date: 2022-12-09
Scope/Range: API Pipe Production
Issued By: American Petroleum Institute
XIan Longjoy Foreign Trade Co.,Ltd Certifications
Standard: ABS certification
Number: 15-HS1468283-PDA
Issue Date: 2016-01-19
Expiry Date: 2021-01-18
Scope/Range: Steel pipe and tubes
Issued By: Houston SED Structures
XIan Longjoy Foreign Trade Co.,Ltd Certifications
Standard: API-5DP certification
Number: 5DP-0040
Issue Date: 2017-08-07
Expiry Date: 2022-08-06
Scope/Range: API Pipe Production
Issued By: American Petroleum Institute
XIan Longjoy Foreign Trade Co.,Ltd Certifications
Standard: Recognition for BV mode II scheme
Number: SMS.W.II./56339/D.0
Issue Date: 2016-04-14
Expiry Date: 2020-05-08
Scope/Range: Steel pipe and tubes
Issued By: American Petroleum Institute

Company Profile

XIan Longjoy Foreign Trade Co.,Ltd

Contact Person: MissDoris Li

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