EAC, GOST, CE, ISO, SKZ: Which Certificates You Actually Need

EAC, GOST, CE, ISO and SKZ are easy to blur together in correspondence with a Chinese factory, and the consequences of confusing them differ completely: without one document the goods will not clear customs, without another the tender committee rejects the bid, without a third the design institute will not approve the specification. Start from two axes: is this a market-access document or a commercial trust signal? and does it certify the product or the management system?

EAC: access to the Union market

The EAC mark means conformity assessed under the technical regulations of the Eurasian Economic Union (Russia, Kazakhstan, Kyrgyzstan, Armenia, Belarus). The essential fact for polyethylene and polypropylene pipe is that there is no single union-wide technical regulation for all pipes, so the required package depends on the application:

• Fire safety: pipes and materials used in buildings and structures are declared under TR EAEU 043/2017; without this declaration, legal sale and tender participation are off the table.
• Hygiene: for drinking-water contact the Union system uses not a certificate but a State Registration Certificate (SRC / СГР), filed by the applicant (which must be a legal entity registered inside the EAEU) on the basis of sanitary-chemical and toxicological test reports from an accredited laboratory.
• Other routes: voluntary certification in national systems (including the Russian GOST R system), or assessment under whichever TR EAEU applies if the product falls inside its scope — for example the electrical part of manifold groups.

Keep declaration and certificate apart: a declaration is registered by the applicant on its own evidence plus accredited lab protocols, while a certificate is issued by a certification body and, for series production, usually involves a factory audit. Validity: series schemes typically run 1 to 5 years with annual surveillance, a batch scheme covers one specific shipment only. The applicant named in the document must match the entity on the invoice and the booking — otherwise at the border the paperwork is simply not yours.

GOST: a standard, not a piece of paper

GOST is a technical standard, not a certificate. For thermoplastic pressure pipe the region normally cites GOST 32415-2013 together with the relevant product-specific standards; composite and aluminium composite pipe is produced to national standards or to TU (technical specifications). What must be verified is not whether the word "GOST" appears in an email but whether the pipe is actually made to the cited standard: SDR, PN, application class, dimension series and the measured test values in the protocol. Separately, the Russian GOST R system — national mandatory and voluntary certification — is still frequently named in tender documents.

CE, ISO, SKZ: what each one proves

• CE is the legal requirement for the EU market under harmonised standards: EN ISO 22391 (PEX), EN ISO 15876 (PP-R), EN ISO 15877 (multilayer composite), EN 1264 (building heating services). It requires a Declaration of Performance, and where the applicable module calls for a notified body, that body's four-digit number must appear in the EU NANDO list.
• ISO 9001 / 14001 / 45001 certify the management system. They describe factory discipline; they do not permit sale and do not replace pipe testing. Only certificates bearing an accreditation mark (CNAS, IAF or a national accreditation body) and verifiable by number in the issuer's register carry weight. We hold ourselves to that rule: SANLI's own ISO 9001 (0350124Q30689R0S), ISO 14001 (0350124E20450R0S) and ISO 45001 (0350124S30433R0S) certificates carry CNAS C035-M and IAF-MRA accreditation and are listed on our Certificates page, verifiable by number with the issuing body and on CNCA.
• SKZ is the Süddeutsches Kunststoff-Zentrum testing institute in Leipzig: independent testing and a quality mark for pipe and fittings. It is not a legal requirement in the EAEU, but it is a strong signal — specifiers and tender committees use SKZ reports precisely to avoid commissioning a full in-house type-test programme.

How a buyer actually uses the documents

At customs you need the EAC declaration or certificate number and date, the correct applicant, and an HS code matching the goods exactly. In a tender you need a document valid on the bid date, a test report covering the size you are buying, and often an opinion based on local water chemistry. For the end client you need a warranty and service life backed by real long-term hydrostatic data, not a catalogue "50 years". A good habit is to ask the factory for a shipment package — declaration or certificate, batch test report, technical data sheet, a photo of the actual coil label — rather than a generic PDF archive assembled for the website. File that package per purchase line: at a border check or a batch claim you will quote a document number and a test protocol, not a messenger chat history.

Four questions, four groups of documents

A single request for "certificates" usually collapses four different questions. Separate them first:

• Does this product type meet the specification? — type-test reports and product conformity documents.
• Can the factory's management repeat it consistently? — system certificates such as ISO 9001.
• Is this shipment the approved product? — lot marking, release records and the retained sample.
• Can it clear customs and be sold lawfully? — the conformity and sanitary documents required by the destination country.

The four do not substitute for one another: a system certificate cannot replace a product assessment, and a type report cannot replace batch records. Mixing them up is the most common documentary failure.

Contract, batch, logistics: written evidence on three levels

Contract level — write the product as a structure, not a label: the layer sequence (inner layer / adhesive / aluminium with the weld type stated / adhesive / outer layer) with material codes, outer diameter × wall thickness with tolerance, coil length with its plus-minus range, net weight per coil, packing and marking, the named Incoterms 2020 rule with a named place, and a change-control clause under which any change of material, adhesive, barrier, printing or packaging returns to written re-approval. Add one line that is often forgotten: the bank account name must match the contracting entity. Where it does not, the payment risk is structural, not documentary.

Batch level — the evidence chain that survives a dispute: a retained sample with a unique number (kept by both parties, with permanent marking on the pipe body), the lot number, factory release test records, and the third-party or pre-shipment inspection report referencing the same lot. Without this chain a warranty is hard to enforce in practice.

Logistics level — the documents the destination actually requires: a packing list (pallet, coil length, net weight), a transport bill whose consignor and consignee match the contract, and the origin and customs papers per the destination's requirement list. That requirement list should be obtained in writing first from a local certification body or customs broker — not copied from the supplier's archive.

Payment nodes — key documents (conformity, test reports, the retained sample) should be verified before the payment nodes that are not refundable. Where they cannot be verified, change the payment terms rather than paying without them.

Which documents are required, the certification schemes, validity periods and registry procedures all change, and the EAEU's transition from national systems to technical regulations is still under way. This article is general information, not legal or certification advice — confirm current requirements with a certification body, your customs broker and the tender documents before shipping.