When was TJL INDUSTRY GROUP CO.,LIMITED founded?

TJL INDUSTRY GROUP CO.,LIMITED was founded in 1998.

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TJL handles valves, actuator, pipe and fittings products.

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The site lists gate valve, ball valve, butterfly valve, check valve, globe valve, filter and exhaust valve, PVC valve, solenoid valve, and steam trap categories.

What butterfly valve subtypes are listed on tjlindustry.com?

The site lists wafer type butterfly valve, lug type butterfly valve, flange center line butterfly valve, double offset butterfly valve, triple eccentric butterfly valve, PTFE butterfly valve, and industry butterfly valve.

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The site directs customers to contact TJL by email at info@tjlindustry.com and through inquiry pages.

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GOST Gate Valve Sourcing & RFQ Guide

This guide is written for importers, distributors and project buyers who are shortlisting a gate valve supplier for GOST pipeline work, and it sets out what a well-run Wholesale gate valve order should contain: the published standards behind the product, the material grades on the data sheet, the checks worth making before you commit, and the information to send with a request for quotation.

See Product Details

GOST standard gate valve supplied for wholesale pipeline projects

Start From Your Buying Role

The same valve is bought for very different reasons. Pick the path that matches your order and use the listed preparation points to build a faster, cleaner quotation.

Path 1

Wholesale & Distribution

You buy in volume for resale or stock and need repeatable sizes, consistent packing and a supplier that answers technical questions quickly.

Fix the sizes you will stock most often
Agree packing and pallet configuration up front
Confirm which documents travel with each shipment

Prepare: DN list, quantity per size, destination port.

Path 2

Project & EPC Packages

You are matching a valve to a line specification, so standards conformance and drawing approval matter more than unit price alone.

Quote against the named design and flange standards
Request a general arrangement drawing for approval
Set the inspection point in the schedule

Prepare: line specification, PN rating, inspection scope.

Path 3

Replacement & MRO

You are replacing an installed valve and the priority is fit — face-to-face length and flange drilling must match what is already in the line.

Record the existing size and pressure rating
Measure face-to-face before ordering
Ask about single-unit or small-lot handling

Prepare: photos, dimensions, quantity required.

GOST standard gate valve product view for wholesale buyers

What the Four Published Standards Mean for You

The product data sheet names four standards. Read as buyer checkpoints rather than model numbers, they tell you exactly what to put in writing on the quotation.

GOST 5762 — Design standard Defines the design basis of the valve. Ask the supplier to state this standard on the quotation so the design basis is not left to interpretation.

GOST 3706 — Face-to-face dimension Controls installed length. This is the dimension that decides whether the valve drops into an existing pipe run without rework.

GOST 12815 — Flange connection Controls bolt circle and drilling. It must match the mating flange on your line, especially in utility and heating networks.

GOST 356 — Inspection and test Names the inspection and test basis. Request the test record against this standard before the shipment is released.

Supply Terms Snapshot

Published numbers sit in the upper block. Commercial terms are confirmed in writing by sales, so they are flagged rather than guessed.

Item	Published detail
Product name	Cast Iron Gate Valve In GOST Standard
Nominal diameter	DN50–DN600
Nominal pressure	PN16 / PN25 / PN40 / PN63 Bar
Design standard	GOST 5762
Face-to-face dimension	GOST 3706
Flange connection	GOST 12815
Inspection and test	GOST 356
Delivery time	15–30 days
Sample policy	Confirm with sales
MOQ	Confirm with sales
Warranty	Confirm with sales
Unit price	Confirm with sales

The product page lists sample, warranty and MOQ as topics but does not publish answers, and no unit price is shown. Treat any figure you see elsewhere as unverified until your quotation states it.

Supplier Qualification Checklist

Ten checkpoints worth working through before you place a first order. Each one produces a specific question you can put to any supplier you are comparing.

Standards compliance chain

Confirm the quotation names GOST 5762 for design, GOST 3706 for face-to-face, GOST 12815 for flange connection and GOST 356 for inspection and test. All four are published for this product, so they can be written into the offer.

Material certificates

Match the certificate to the grade you ordered. Published options are ASTM A216 WCB and ASTM A351 CF8 for the body, SS420 or SS304 for the disc, Steel 45 or Monel K500 for the stem, and 13Cr for the seat.

Test reports

The named test basis is GOST 356. Ask for the pressure test record, the test medium used and the point in production at which the test is carried out.

Factory or trader

The supplier states it is a supplier and factory in China that can produce to buyer requirements. Verify which operations — machining, assembly, testing — happen in-house before you rely on lead times.

Export documentation capability

Check that packing list, commercial invoice and certificate of origin can be issued in the form your customs broker needs, and that the supplier can quote the Incoterm you work with.

Inspection access

Agree the inspection point in the schedule and whether buyer or third-party inspection is accepted, plus whether photo or video evidence is shared before dispatch.

Dimensional conformity

Face-to-face length and flange drilling are the two dimensions that stop an installation. Tie the order to GOST 3706 and GOST 12815 and ask for a dimensional record.

Pressure test evidence

For the PN rating you order — PN16, PN25, PN40 or PN63 — confirm which test pressures apply and have the result recorded against your order number, not just the batch.

Packing and export readiness

For larger sizes, settle flange face protection, end protection and crate or pallet configuration before production finishes, not after the goods are packed.

RFQ responsiveness

Send a first RFQ with DN, PN, material, quantity and destination. How clearly and how quickly the technical questions come back tells you how the delivery will be managed.

Material & Configuration Options

These are the material options published for this valve. Selection is made per component, so a single order can combine a steel body with a stainless trim.

Component	Published material options
Body	Carbon Steel ASTM A216 WCB · Stainless Steel ASTM A351 CF8
Disc	Carbon Steel ASTM A216 WCB · Stainless Steel SS420 / SS304
Stem	Carbon Steel Steel 45 · Stainless Steel Monel K500
Seat	13Cr

Naming caution: the product title reads “Cast Iron,” but the published material list shows carbon steel and stainless steel for the body. Resolve this before quoting: state the body grade you actually need — ASTM A216 WCB or ASTM A351 CF8 — and have the supplier confirm it in writing on the offer.

GOST gate valve material and configuration options for wholesale supply

Scenario-to-Specification Decision Table

Use this to prepare the first technical conversation. These are discussion starting points inside the published DN50–DN600 and PN16–PN63 range, not engineering selections — your project specification decides the final size and rating.

Buyer scenario	Starting point to discuss	Decision to lock before ordering
Distribution stock for resale	DN50–DN200, PN16	How many sizes you will hold, repeat-order consistency, and export packing suited to warehouse storage. Published range is DN50–DN600 with a 15–30 day delivery time.
Utility and district heating isolation	DN100–DN300, PN16 / PN25	Flange drilling must match the existing network, so tie the order to GOST 12815 and confirm the mating flange before production.
Industrial process line or EPC package	DN200–DN600, PN40 / PN63	Design basis and installed length for the pipe run — quote against GOST 5762 and GOST 3706, and approve the drawing first.
Replacement and MRO	Match the installed valve	Measure face-to-face and flange dimensions on site before ordering so the replacement fits without pipe rework.
Higher-pressure or more demanding service	Confirm the PN rating with sales	Body and trim grade: published body options are ASTM A216 WCB and ASTM A351 CF8, with a 13Cr seat and SS420 / SS304 disc options.

Order-to-Delivery Workflow

A wholesale valve order runs on documents and confirmations, not on a shopping cart. The published delivery time is 15–30 days, and it starts after the specification and drawing are agreed.

Step 1

Send the RFQ

DN, PN, quantity per size, material choice, standard and destination port.

Step 2

Specification and drawing confirmation

Align face-to-face and flange details to GOST 3706 and GOST 12815 before anything is cut.

Step 3

Proforma invoice

Price, terms, packing and schedule confirmed in writing by sales.

Step 4

Production

Manufacturing runs to the published 15–30 day delivery window.

Step 5

Inspection and test

Inspection and test to GOST 356, plus any buyer or third-party inspection you agreed.

Step 6

Packing

Flange face protection and export packing confirmed before the goods are closed.

Step 7

Shipping documents

Packing list, invoice, origin certificate and test documentation issued with the shipment.

What the buyer must supply: DN and PN · body, disc, stem selection · flange drilling confirmation to GOST 12815 · quantity per size · destination port and Incoterm · required documents and inspection scope · required delivery date.

Documents to Request With the Quotation

Ask for the document list as part of the RFQ so it is priced and scheduled with the order rather than chasing it after dispatch.

Pressure test report

Recorded against the named inspection and test basis, GOST 356, and linked to your order number.

Dimensional record

Face-to-face length to GOST 3706 and flange drilling to GOST 12815, so the valve can be checked against the line before installation.

Material certificates

For the grades actually ordered — ASTM A216 WCB or ASTM A351 CF8 body, SS420 / SS304 disc, Steel 45 or Monel K500 stem, 13Cr seat.

General arrangement drawing

Issued for approval before production so dimensions and connection details are agreed by both sides.

Packing list and commercial invoice

Prepared in the form your customs broker and port require for clearance.

Certificate of origin

Confirm the issuing body and format your destination market accepts before the shipment leaves.

Document availability, legalisation and language are confirmed by sales with each quotation — state your requirements in the RFQ and they can be written into the offer.

Send Your Gate Valve RFQ

Include DN, PN, material selection, quantity per size, flange drilling requirement and destination port, and the supplier can quote against the published GOST standards. A PDF specification download is available on the product page for sharing with your engineering or purchasing team.

Product Page & PDF

Emailinfo@tjlindustry.com
Tel+86-22-28219562
Fax+86-22-28219554 ext.8888
Request for quotationSubmit an RFQ or custom production request

Frequently Asked Questions

which standards does this gost gate valve follow?

the product page lists gost 5762 for design, gost 3706 for face-to-face dimension, gost 12815 for flange connection, and gost 356 for inspection and test. ask for all four to appear on the quotation and on the inspection documentation.

what sizes and pressure ratings are available?

nominal diameter runs from dn50 to dn600, and nominal pressure covers pn16, pn25, pn40 and pn63 bar. confirm the sizes you intend to stock or install so the quotation is built around your real mix.

what materials are published for body, disc, stem and seat?

the body is offered in carbon steel astm a216 wcb or stainless steel astm a351 cf8; the disc in carbon steel astm a216 wcb or stainless steel ss420 / ss304; the stem in carbon steel steel 45 or stainless steel monel k500; and the seat in 13cr.

why does the title say cast iron when the material list shows steel?

the product title uses “cast iron,” while the published material table lists carbon steel and stainless steel for the body. because the two do not match, state the body grade you require and have the supplier confirm that exact grade in writing before you place the order.

what is the delivery time, and how do i get price, moq or warranty terms?

delivery time is published as 15–30 days. price, moq, warranty and sample terms are not published on the page, so they must be confirmed by sales — send your size list and destination and ask for them in writing on the quotation.

can the valve be produced to my own requirements?

the product page states the factory can produce the product according to buyer requirements, so custom production is possible. send dn, pn, material selection, quantity, standard alignment and destination to start the rfq, and include your drawing or specification if you have one.

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