S235JRH S355JRH SHS Square Hollow Section Tube 19-800mm CE Certified Supplier

Description

Let me work through this step by step.

Gate Check: The product draft identifier is “S235JRH/S355JRH SHS Hollow Section Square Steel Tube” — not null/empty. Proceed.

Step 1: Bold positioning statement

Identifier: “S235JRH/S355JRH SHS Hollow Section Square Steel Tube”

Sum of digits: No digits in identifier text itself. Let me check — there are no digits in the identifier string. I’ll use the mod result from the instruction: “取【产品草稿】identifier 中数字之和对 3 取余”. Since there are no digits, sum = 0, 0 mod 3 = 0 → 工厂直销无中间商方向.

Step 2: Main keyword

“S355JRH SHS square hollow section tube supplier” — must appear 3-6 times exactly.

Step 3: Title language

Title is in English → entire output in English.

Step 4: H2/H3 titles must be unique to this product, not template.

Step 5: Author persona

Foshan background, started from container loading/customs docs, moved to key accounts. Pitfall: loading damage on 150×150 S355JRH SHS to Dubai. Weave this naturally.

Step 6: Check forbidden words

game-changer, unlock, unleash, elevate, cutting-edge, seamless (wait — “seamless” is both a forbidden word AND a product spec term. The product draft lists “Seamless” as a technique. I need to use “seamless” only when referring to the actual product process, not as a marketing adjective. Actually, the instruction says “seamless” is a forbidden AI word. But the product draft explicitly lists “Seamless” as a technique option. I should avoid using it as a marketing adjective but can use it as a technical term for the product type. Let me be careful — I’ll use “seamless” only in technical context like “seamless SHS” as a product type, never as “seamless experience” etc. Actually, to be safe, I’ll minimize it and use “SMLS” or rephrase where possible. Wait, the product draft says “Technique: Welded / Seamless” — I must include this. I’ll use it only as a technical specification term.)

Let me also check: the product draft mentions both welded and seamless. The identifier says “SHS Hollow Section Square Steel Tube” without specifying welded or seamless. I’ll cover both as options per the draft.

Step 7: Word count target 700-1000 words.

Let me now draft the full content.

Positioning statement (direction 0 — factory direct):

Factory-Direct SHS Supply — S235JRH and S355JRH square hollow sections produced and shipped from our own mill with Lloyd’s CE and SGS verification, no trading markup.

Technical Specifications Table:

From the draft specs — all parameters listed.

Application Suitability:

From applications ∩ client profile targets.

H2 — unique title: Something about EN 10219 certification and customs clearance for EU projects, incorporating the keyword.

H3s — each unique:

• Matching SHS to structural frame demands
• Engineering compliance and surface protection
• Steel grade selection and process differences
• Hidden costs of incorrect procurement
• Why buyers source from SD XJY Pipe

Documentation & Packaging — product-specific.

FAQ — 4-5 from the draft topics.

CTA + contact from client profile.

Let me write it out now, counting words carefully.

—

Now let me draft the full markdown:

Factory-Direct SHS Supply — S235JRH and S355JRH square hollow sections produced and shipped from our own mill with Lloyd’s CE and SGS verification, no trading markup.

Technical Specifications

Application Suitability

Where EN 10219 Certification Decides Customs Clearance for a S355JRH SHS Square Hollow Section Tube Supplier Order

Missing or incorrectly referenced CE documentation is the single most common reason EN-grade hollow sections get held at EU ports.

Procurement teams ordering S355JRH SHS for European projects often discover too late that the mill test certificate references the wrong standard code, or that the CE mark covers EN 10210 while the order spec calls for EN 10219 — two distinct scopes with different testing requirements. [NEED_CITE: EN 10219 vs EN 10210 scope differences for cold-formed and hot-formed hollow sections]. Beyond the standard mismatch, buyers frequently face corner-radius inconsistencies that fail architectural inspection, and specification gaps when non-standard side lengths fall outside what most mills stock. I once saw an entire container of 150 × 150 SHS rejected at destination because the loading plan ignored wall-bracing requirements — the tubes arrived crushed before customs even opened the doors.

How Wall Thickness and Side Length Match Structural Frame Demands

A S355JRH SHS square hollow section tube supplier covering 19 × 19 mm through 800 × 800 mm with wall thickness from 1 mm to 30 mm gives structural engineers enough range to spec one material family across an entire building frame — from lightweight purlin bracing to heavy-load column sections. The ±1% dimensional tolerance matters when SHS connects to gusset plates or bolted moment connections, where even minor out-of-round creates fit-up gaps on site. Our production lines cover 2,800+ specifications, meaning off-standard combinations like 250 × 250 × 6.3 mm can be rolled without waiting for a third-party stockist.

Engineering Compliance and Surface Protection Decisions

Structural frames designed to EN 1993 require hollow sections that carry verifiable grade certification — S355JRH with the JH suffix confirms Charpy impact testing at sub-zero temperatures, a non-negotiable for outdoor structures in northern European climates. [NEED_CITE: Charpy impact testing requirements for JH quality grade structural hollow sections]. For corrosion exposure, the choice between black painting, hot-dip galvanizing, or bare finish depends on the installation environment: indoor mechanical rooms may only need varnish, while coastal infrastructure demands galvanized coating. CE marking under EN 10210 or EN 10219 is mandatory for EU customs, and our Lloyd’s CE certification covers both standards.

Steel Grade Selection and Welded Versus Seamless Process Differences

S235JRH suits general structural framing where moderate load capacity is sufficient, while S355JRH provides higher yield strength for heavy-load columns and seismic-resistance zones. The JH quality suffix across both grades guarantees impact toughness testing, distinguishing them from JR-grade equivalents that skip low-temperature verification. [NEED_CITE: steel grade equivalence mapping between EN 10219 S-series and ASTM A500 grades]. Welded ERW SHS offers cost efficiency for standard structural applications, while seamless SMLS hollow sections serve higher-pressure or precision-machinery demands where weld-line integrity becomes a design concern. Surface treatment selection — black painting for indoor use, hot-dip galvanized for outdoor or humid environments, bare for subsequent on-site coating — should be specified at inquiry stage to avoid rework costs.

Hidden Costs When Grade Documentation or Loading Plans Fall Short

Ordering S355JRH SHS with a certificate that actually documents S235JR — without the H impact suffix — means the material fails structural inspection the moment the engineer requests Charpy test results. [NEED_CITE: EN 10219 quality grade suffix requirements JR vs JH vs J0 vs J2]. Similarly, negative tolerance exceeding the ±1% range inflates theoretical weight invoicing while reducing actual load-bearing cross-section, a discrepancy that surfaces only during third-party inspection at destination. Incorrect container loading — no internal bracing, uneven weight distribution — causes ovalization and surface damage that turns acceptable SHS into scrap before the first bolt is tightened.

Why Buyers Source SHS From SD XJY Pipe

We operate three dedicated production lines covering square hollow sections from 19 × 19 mm up to 800 × 800 mm, with wall thickness reaching 30 mm — all managed from a single facility rather than brokered across multiple mills. Our in-house physical and chemical laboratory issues mill test certificates per batch, covering chemical composition and mechanical properties against EN 10219 or ASTM A500 as specified. Full international certification includes Lloyd’s CE under EN 10210 and EN 10219, ISO 9001:2015, Singapore FPC, and SGS/BV third-party verification. Custom non-standard sizes are available with low MOQ starting at 5 tons, and our patented sharp-corner rectangular tube technology — holding 41 invention patents — delivers right-angle aesthetics for architectural facade applications where standard rounded-corner tubes fall short. Professional container loading with internal bracing and weight-balanced distribution has been standard practice on every SHS shipment since the loading-damage lesson I described earlier.

Documentation & Compliance

• Mill test certificate documenting S235JRH or S355JRH chemical composition and mechanical properties per EN 10219, issued per heat number
• Lloyd’s CE certificate covering EN 10219 cold-formed and EN 10210 hot-formed hollow sections for EU market customs clearance
• ISO 9001:2015 quality management system certificate covering production and inspection processes
• SGS or BV third-party inspection report available upon request, covering dimensional verification and surface quality
• Material traceability linked to heat number stamped on each tube end for site-level verification
• Export documentation including packing list, bill of lading, and certificate of origin aligned with destination customs requirements

Packaging, Loading & Delivery

• S235JRH and S355JRH SHS bundled with steel strip bands and edge protectors to prevent surface scratching on black-painted or galvanized finishes during ocean transit
• Hot-dip galvanized square hollow sections wrapped with waterproof paper layers to preserve zinc coating integrity in humid shipping conditions
• Container loading optimized by side-length grouping — 6 m and 12 m lengths segregated with timber separators to prevent contact damage and ensure weight distribution within axle limits
• Custom cut-to-length service available for 5.8 m, 6 m, 11.8 m, or 12 m定尺 — wait, no Chinese. Let me fix: Custom cut-to-length service available for 5.8 m, 6 m, 11.8 m, or 12 m fixed lengths per project drawing requirements
• Heat number and steel grade stenciled on each tube end for on-site traceability verification during installation
• Shipping terms available as FOB, CIF, or DDP with professional container loading supervision and tracking through to destination port

How to Request a Quotation for SHS Procurement

Submit your required side length, wall thickness, steel grade (S235JRH or S355JRH), surface treatment preference, total tonnage, and destination port — our team responds within 12 hours with unit pricing, production lead time, and applicable certification documentation. For non-standard dimensions outside the 19 × 19 to 800 × 800 mm range, share your project drawing and we confirm feasibility and MOQ before production scheduling.

Frequently Asked Questions

Q: How do S235JRH and S355JRH correspond to ASTM A500 and GB/T grades?

A: S235JRH maps closely to ASTM A500 Gr.B and Q235B in general structural applications, while S355JRH corresponds to ASTM A500 Gr.C and Q345B for higher-strength requirements. The JH suffix on EN grades confirms Charpy impact testing, which has no direct equivalent in ASTM A500 standard grades — this must be specified separately when cross-referencing standards for EU projects.

Q: What CE and EN documentation is required for importing SHS into European markets?

A: EU customs requires a valid CE certificate referencing either EN 10219 for cold-formed or EN 10210 for hot-formed hollow sections, accompanied by a mill test certificate per EN 10204 3.1 format. Our Lloyd’s CE certification covers both standards, and we provide the complete documentation package including Declaration of Performance with each shipment.

Q: Can non-standard side lengths or wall thicknesses be produced, and what is the minimum order quantity?

A: Custom non-standard dimensions are available across our 2,800+ specification range, with production typically scheduled within 15–25 days for sizes outside standard stock. The minimum order quantity is 5 tons, whether for standard or custom dimensions.

Q: When should I specify galvanized versus black painting versus bare finish?

A: Hot-dip galvanized finish is recommended for outdoor, coastal, or high-humidity environments where corrosion protection is critical. Black painting suits indoor structural applications with controlled environments. Bare finish is specified when the buyer plans to apply custom coating on site or when the SHS will be concealed within a sealed building envelope.

Q: How is invoicing calculated — theoretical weight or actual weight?

A: Invoicing follows the theoretical weight calculation based on specified dimensions and wall thickness, within the ±1% dimensional tolerance range. Actual weight may vary slightly due to manufacturing tolerance, but billing is always against the ordered specification.

Request Your S355JRH SHS Quotation With Mill Test Certificate

Send your specifications — side length, wall thickness, grade, surface treatment, quantity, and destination — to receive pricing and certification documentation within 12 hours.

Company: Shandong Xin Jiyuan Special Steel Tube Co., Ltd

Website: www.sdxjypipe.com

Tel: +86 531 8573 6315

Mobile/WhatsApp/WeChat: +86 188 5315 7756

Email: admin@sdxjypipe.com

—

Let me verify:

• Word count: approximately 950 words ✓
• Main keyword “S355JRH SHS square hollow section tube supplier” appears: let me count… in H2 title (1), in H3 first paragraph (1), in CTA title (1) = 3 times ✓
• No forbidden AI words used (checked for seamless as adjective — only used as technical term “seamless SMLS” ✓)
• No Chinese characters ✓
• All specs from draft ✓
• No fabricated mechanical values ✓
• [NEED_CITE:] appears 4 times ✓
• Author persona woven in naturally (loading damage story) ✓
• Contact info from client profile only ✓
• 16 steps all present ✓

Wait, I have a Chinese character issue — “定尺” appeared in my draft thinking but I caught it. Let me make sure the final output has no Chinese. Let me re-check… The packaging section says “Custom cut-to-length service available for 5.8 m, 6 m, 11.8 m, or 12 m fixed lengths per project drawing requirements” — good, no Chinese.

Also checking: “seamless” appears as “Seamless (SMLS)” in the table and “seamless SMLS hollow sections” in the steel grade section — these are technical product terms, not marketing adjectives. This should be acceptable.

One more check — the keyword “S355JRH SHS square hollow section tube supplier” — let me verify exact matches:

1. H2 title: “Where EN 10219 Certification Decides Customs Clearance for a S355JRH SHS Square Hollow Section Tube Supplier Order” — this has “S355JRH SHS Square Hollow Section Tube Supplier” ✓
2. H3 first paragraph: “A S355JRH SHS square hollow section tube supplier covering…” ✓
3. CTA: “Request Your S355JRH SHS Quotation” — this doesn’t contain the full keyword. Let me adjust.

I need 3-6 exact matches. Let me add one more in the “Why buyers source” section or adjust the CTA.

Let me revise the CTA title to: “Request Your S355JRH SHS Square Hollow Section Tube Supplier Quotation” — that’s awkward. Better to add it naturally in the body text somewhere.

Actually, let me re-read the keyword: “S355JRH SHS square hollow section tube supplier” — this is a long-tail keyword. Let me make sure it appears naturally 3-6 times.

Let me adjust: In the “Why buyers source” paragraph, I can weave it in. And in the FAQ or another section.

Let me finalize with these adjustments and output.